Updated on 2024/07/28

Information

 

写真a

 
TAKAKUWA OSAMU
 
Organization
Faculty of Engineering Department of Mechanical Engineering Associate Professor
School of Engineering (Joint Appointment)
Graduate School of Engineering Department of Mechanical Engineering(Joint Appointment)
Title
Associate Professor
Contact information
メールアドレス
Tel
0928023213
Profile
破壊力学,材料強度学を基盤とし,種々の実験・観察・解析技術を用いて構造材料の力学特性に関する学術研究ならびに応用研究を実施している。 <主な研究内容> ・Fe-Cr-Ni準安定オーステナイト鋼の相変態と力学特性発現メカニズムの解明:4Dイメージング ・シンクロトロン放射光を用いた構造材料の水素脆性に関するその場3次元観察 ・Fe-Cr-Niオーステナイト鋼の水素存在状態に関する原子スケール計算 ・Ni基超合金の析出粒子における水素トラップ状態に関する原子スケール計算 ・Ni基超合金の水素誘起き裂進展抵抗低下、延性低下メカニズムの解明 ・BCC鋼の水素環境下疲労き裂進展特性評価

Degree

  • Ph.D. in Eng.

Research History

  • 東北大学 (2012.4.1-2016.9.30)

Research Interests・Research Keywords

  • Research theme:Numerical simulation on the hydrogen solubility in Fe-Cr-Ni alloy using a first principle calculation

    Keyword:Hydrogen, Solubility, First principle calculation

    Research period: 2021.4

  • Research theme:Hydrogen embrittlement mechanism in austenitic stainless steels using a in-situ high-resolution X-ray CT and X-ray diffraction

    Keyword:X-ray CT, X-ray diffraction, hydrogen embrittlement

    Research period: 2021.4

  • Research theme:A mechanism behind the hydrogen-induced fatigue crack propagation in BCC steels based on a thermal activation process of hydrogen-dislocation interaction

    Keyword:Hydrogen, fatigue crack growth

    Research period: 2018.4

  • Research theme:Effect of hydrogen on the mechanical properties in a Ni-based superalloy

    Keyword:Ni-based superalloy

    Research period: 2018.4

  • Research theme:Strength properties of metals in high pressure gaseous hydrogen environment

    Keyword:Hydrogen energy society, hydrogen embrittlement, Crack propagation, Fracture toughness

    Research period: 2016.10 - 2021.3

  • Research theme:Improvement of fatigue strength by a surface modification

    Keyword:Surface modification, Fatigue

    Research period: 2012.4 - 2016.9

Awards

  • 日本材料学会優秀講演賞

    2023.5   日本材料学会   第8回マルチスケール材料力学シンポジウムにて優れた講演を行ったため

  • 日本鉄鋼協会論文賞(俵論文賞)

    2023.3   日本鉄鋼協会   内部・外部水素によるNi基超合金718の延性低下機構とその温度依存性

  • 九州大学共同研究等活動表彰

    2022.11   九州大学   共同研究等の活性化に努め、九州大学に多大な貢献をした。

  • 溶接学会FS賞

    2020.6   溶接学会  

  • 九州大学共同研究等活動表彰

    2019.11   九州大学   共同研究等の活性化に努め、九州大学に多大な貢献をした。

  • 日本機械学会優秀講演賞

    2019.11   日本機械学会  

  • 日本機械学会奨励賞(研究)

    2014.4   日本機械学会  

  • 優秀講演発表賞

    2013.5   日本材料学会  

  • 日本ウォータージェット学会論文賞

    2013.5   日本ウォータージェット学会  

  • 総長賞

    2012.3   東北大学  

  • 日本機械学会フェロー賞

    2007.10   日本機械学会  

▼display all

Papers

  • Solid-solution hardening by hydrogen in Fe-Cr-Ni-based austenitic steel: temperature and strain effects Reviewed International journal

    Yuhei OGAWA, Osamu TAKAKUWA, Kaneaki TSUZAKI

    Materials Science and Engineering A   879   2023.7

     More details

    Language:English   Publishing type:Research paper (scientific journal)  

  • Antagonistic fatigue crack acceleration/deceleration phenomena in Ni-based superalloy 718 under hydrogen-supply Reviewed International journal

    Osamu TAKAKUWA, Yuhei OGAWA, Ryunosuke MIYATA

    Scientific Reports   13   2023.6

     More details

    Language:English   Publishing type:Research paper (scientific journal)  

  • Criteria for hydrogen-assisted crack initiation in Ni-based superalloy 718 Reviewed International journal

    Yuhei OGAWA, Kohei Noguchi, Osamu TAKAKUWA

    Acta Materialia   229   2022.5

     More details

    Language:English   Publishing type:Research paper (scientific journal)  

  • Hydrogen-assisted fatigue crack-propagation in a Ni-based superalloy 718, revealed via crack-path crystallography and deformation microstructures Reviewed

    Yuhei Ogawa, Osamu Takakuwa, Saburo Okazaki, Yusuke Funakoshi, Saburo Matsuoka, Hisao Matsunaga

    Corrosion Science   174   2020.9

     More details

    Language:English   Publishing type:Research paper (scientific journal)  

    DOI: 10.1016/j.corsci.2020.108814

  • A mechanism behind hydrogen-assisted fatigue crack growth in ferrite-pearlite steel focusing on its behavior in gaseous environment at elevated temperature Reviewed

    Osamu Takakuwa, Yuhei Ogawa, Saburo Okazaki, Masami Nakamura, Hisao Matsunaga

    Corrosion Science   168   2020.5

     More details

    Language:English   Publishing type:Research paper (scientific journal)  

    DOI: 10.1016/j.corsci.2020.108558

  • Pronounced transition of crack initiation and propagation modes in the hydrogen-related failure of a Ni-based superalloy 718 under internal and external hydrogen conditions Reviewed

    Y. Ogawa, O. Takakuwa, Saburo Okazaki, Koichi Okita, Yusuke Funakoshi, H. Matsunaga, Saburo Matsuoka

    Corrosion Science   2019.1

     More details

    Language:English   Publishing type:Research paper (scientific journal)  

    DOI: 10.1016/j.corsci.2019.108186

  • Hydrogen-induced ductility loss of precipitation-strengthened Fe-Ni-Cr-based superalloy Reviewed

    Osamu Takakuwa, Yuhei Ogawa, Junichiro Yamabe, Hisao Matsunaga

    Materials Science and Engineering A   739   335 - 342   2019.1

     More details

    Language:English   Publishing type:Research paper (scientific journal)  

    DOI: 10.1016/j.msea.2018.10.040

  • Peculiar temperature dependence of hydrogen-enhanced fatigue crack growth of low-carbon steel in gaseous hydrogen Reviewed

    Saburo Matsuoka, Osamu Takakuwa, Saburo Okazaki, Michio Yoshikawa, Junichiro Yamabe, Hisao Matsunaga

    Scripta Materialia   154   101 - 105   2018.9

     More details

    Language:English   Publishing type:Research paper (scientific journal)  

    DOI: 10.1016/j.scriptamat.2018.05.035

  • Comprehensive Understanding of Ductility Loss Mechanisms in Various Steels with External and Internal Hydrogen Reviewed

    Osamu Takakuwa, Junichiro Yamabe, Hisao Matsunaga, Yoshiyuki Furuya, Saburo Matsuoka

    Metallurgical and Materials Transactions A: Physical Metallurgy and Materials Science   48 ( 11 )   5717 - 5732   2017.11

     More details

    Language:English   Publishing type:Research paper (scientific journal)  

    DOI: 10.1007/s11661-017-4323-3

  • Experimental verification of the hydrogen concentration around a crack tip using spot X-ray diffraction Reviewed

    Osamu Takakuwa, Takuya Fujisawa, Hitoshi Soyama

    International Journal of Hydrogen Energy   41 ( 48 )   23188 - 23195   2016.12

     More details

    Language:English   Publishing type:Research paper (scientific journal)  

    DOI: 10.1016/j.ijhydene.2016.10.083

  • Hydrogen-enhanced deformation twinning in Fe-Cr-Ni-based austenitic steel characterized by in-situ EBSD observatio Reviewed International journal

    Yuhei OGAWA, Haruki NISHIDA, Osamu TAKAKUWA, Kaneaki TSUZAKI

    Materials Today Communications   34   2023.3

     More details

    Language:English   Publishing type:Research paper (scientific journal)  

  • Direct observation of three-dimensional short fatigue crack closure behavior in Ti-6Al-4V alloy using ultra-high-resolution X-ray microtomography Reviewed International journal

    Valary TUBEI, Hiroyuki TODA, Worapol KENTANOND, Hiro FUJIHARA, Osamu TAKAKUWA, Akihisa TAKEUCHI, Masayuki UESUGI

    International Journal of Fatigue   168   2023.3

     More details

    Language:English   Publishing type:Research paper (scientific journal)  

  • 析出硬化型高Mnオーステナイト鋼の水素脆化挙動に及ぼすNi含有量および時効熱処理の影響 Invited Reviewed

    細田孝, 小川祐平, 髙桑脩, 本村達,細井日向, 松永久生

    鉄と鋼   108 ( 2 )   2021.11

     More details

    Language:Japanese   Publishing type:Research paper (scientific journal)  

  • Fatigue crack-growth retardation after overloading in gaseous hydrogen: revisiting the effect of hydrogen on crack-tip plastic-zone development Invited Reviewed International journal

    Yuhei OGAWA, Keiichiro IWATA, Saburo OKAZAKI, Masami NAKAMURA, Kazuki MATSUBARA, Osamu TAKAKUWA, Hisao MATSUNAGA

    Materials Letters   308   2021.10

     More details

    Language:English   Publishing type:Research paper (scientific journal)  

  • 内部・外部水素によるNi基超合金718の延性低下機構とその温度依存性 Reviewed

    野口耕平, 小川祐平, 髙桑脩, 松永久生

    鉄と鋼   107 ( 11 )   2021.7

     More details

    Language:Japanese   Publishing type:Research paper (scientific journal)  

  • 3D short fatigue crack closure behavior in Ti-6Al-4V alloy investigated using in-situ high resolution synchrotron X-ray tomography Reviewed International journal

    Valary Tubei, Hiroyuki Toda, Meysam Hassanipour, Kyosuke Hirayama, Osamu Takakuwa, Akihisa Takeuchi, Masayuki Uesugi

    Engineering Fracture Mechanics   249   2021.5

     More details

    Language:English   Publishing type:Research paper (scientific journal)  

    DOI: 10.1016/j.engfracmech.2021.107755

  • Hydrogen-assisted, intergranular, fatigue crack-growth in ferritic iron Influences of hydrogen-gas pressure and temperature variation Reviewed

    Yuhei Ogawa, Kensuke Umakoshi, Masami Nakamura, Osamu Takakuwa, Hisao Matsunaga

    International Journal of Fatigue   140   2020.11

     More details

    Language:English   Publishing type:Research paper (scientific journal)  

    DOI: 10.1016/j.ijfatigue.2020.105806

  • Hydrogen, as an alloying element, enables a greater strength-ductility balance in an Fe-Cr-Ni-based, stable austenitic stainless steel Reviewed

    Acta Materialia   199   181 - 192   2020.10

     More details

    Language:English   Publishing type:Research paper (scientific journal)  

    DOI: 10.1016/j.actamat.2020.08.024

  • Defect tolerance and hydrogen susceptibility of the fatigue limit of an additively manufactured Ni-based superalloy 718 Reviewed

    Kevinsanny, Saburo Okazaki, Osamu Takakuwa, Yuhei Ogawa, Yusuke Funakoshi, Hideto Kawashima, Saburo Matsuoka, Hisao Matsunaga

    International Journal of Fatigue   139   2020.10

     More details

    Language:English   Publishing type:Research paper (scientific journal)  

    DOI: 10.1016/j.ijfatigue.2020.105740

  • 転位の水素トラップ占有率に基づく高圧水素ガス中における水素拡散特性と各種破壊特性の統一的解釈-オーステナイト系ステンレス鋼と低合金鋼 Reviewed

    松岡三郎, 髙桑脩, 岡崎三郎,吉田聡子,山辺純一郎,松永久生

    日本機械学会論文集   88 ( 888 )   2020.7

     More details

    Language:Japanese   Publishing type:Research paper (scientific journal)  

  • Comparative study of hydrogen-induced intergranular fracture behavior in Ni and Cu–Ni alloy at ambient and cryogenic temperatures Reviewed

    766   2019.10

     More details

    Language:English   Publishing type:Research paper (scientific journal)  

    In order to clarify the contribution of dislocation‒hydrogen interaction on the hydrogen embrittlement (HE) of pure Ni and of Cu‒55 wt% Ni binary alloy, slow strain rate tensile (SSRT) tests were conducted at room temperature (RT) and at 77 K on hydrogen-precharged specimens. Regarding the SSRT test at RT, hydrogen increased the flow stress and induced intergranular fracture in both pure Ni and Cu–Ni alloy. Furthermore, based on scanning transmission electron microscopy investigations, it was suggested that the evolution of dislocation structures had been enhanced by hydrogen, but only in the case of pure Ni. At 77 K, the ductility of pure Ni was degraded by hydrogen, whereas that of Cu–Ni alloy was not. The difference in temperature dependence of the dislocation‒hydrogen interaction between pure Ni and Cu–Ni alloy was discussed, based on the previously proposed HE mechanisms.

    DOI: 10.1016/j.msea.2019.138349

  • Simulation of the effect of internal pressure on the integrity of hydrogen pre-charged BCC and FCC steels in SSRT test conditions Invited Reviewed International journal

    Jean-Gabriel Sezgin, Osamu Takakuwa, Hisao Matsunaga, Junichiro Yamabe

    Engineering Fracture Mechanics   2019.7

     More details

    Language:English   Publishing type:Research paper (scientific journal)  

    DOI: 10.1016/j.engfracmech.2019.106505

  • Hydrogen-Assisted Crack Propagation of α-iron during Elasto-Plastic Fracture Toughness Test Reviewed International journal

    Domas Birenis, Yuhei Ogawa, Hisao Matsunaga, Osamu Takakuwa, Annett Thøgersen, Øystein Prytz, Junichiro Yamabe

    756   396 - 404   2019.5

     More details

    Language:English   Publishing type:Research paper (scientific journal)  

    DOI: 10.1016/j.msea.2019.04.084

  • Role of Hydrogen-Charging on Nucleation and Growth of Ductile Damage in Austenitic Stainless Steels Reviewed International journal

    Eric Maire, Stanislas Grabon, Jerome Adrien, Pablo Lorenzino, Yuki Asanuma, Osamu Takakuwa, Hisao Matsunaga

    Materials   12   2019.1

     More details

    Language:English   Publishing type:Research paper (scientific journal)  

    DOI: 10.3390/ma12091426

  • Effect of defects and hydrogen on the fatigue limit of Ni-based superalloy 718 Reviewed

    Kevinsanny, Saburo Okazaki, Osamu Takakuwa, Yuhei Ogawa, Koichi Okita, Yusuke Funakoshi, Junichiro Yamabe, Saburo Matsuoka, Hisao Matsunaga

    Fatigue Design 2019 - 8th edition of the International Conference on Fatigue Design Procedia Structural Integrity   19   312 - 319   2019.1

     More details

    Language:English   Publishing type:Research paper (scientific journal)  

    DOI: 10.1016/j.prostr.2019.12.034

  • Temperature dependence of fatigue crack growth in low-carbon steel under gaseous hydrogen

    Osamu Takakuwa, Yuhei Ogawa, Saburo Okazaki, Hisao Matsunaga, Saburo Matsuoka

    ASME 2019 Pressure Vessels and Piping Conference, PVP 2019 Materials and Fabrication   2019.1

     More details

    Language:English   Publishing type:Research paper (other academic)  

    DOI: 10.1115/PVP2019-93451

  • Fracture and deformation behavior in slow-strain-rate tensile testing of Cu-Ni alloy with internal hydrogen

    Kentaro Wada, Junichiro Yamabe, Yuhei Ogawa, Osamu Takakuwa, Takashi Iijima, Hisao Matsunaga

    ASME 2019 Pressure Vessels and Piping Conference, PVP 2019 Materials and Fabrication   2019.1

     More details

    Language:English   Publishing type:Research paper (other academic)  

    DOI: 10.1115/PVP2019-93477

  • Change of crack initiation and propagation modes in hydrogenrelated failure of a precipitation-strengthened NI-based superalloy 718 under internal and external hydrogen conditions

    Yuhei Ogawa, Osamu Takakuwa, Saburo Okazaki, Saburo Matsuoka, Hisao Matsunaga

    ASME 2019 Pressure Vessels and Piping Conference, PVP 2019 Materials and Fabrication   2019.1

     More details

    Language:English   Publishing type:Research paper (other academic)  

    DOI: 10.1115/PVP2019-93204

  • The roles of internal and external hydrogen in the deformation and fracture processes at the fatigue crack tip zone of metastable austenitic stainless steels Reviewed

    Yuhei Ogawa, Saburo Okazaki, Osamu Takakuwa, Hisao Matsunaga

    Scripta Materialia   157   95 - 99   2018.12

     More details

    Language:English   Publishing type:Research paper (scientific journal)  

    DOI: 10.1016/j.scriptamat.2018.08.003

  • Interpretation of hydrogen-assisted fatigue crack propagation in BCC iron based on dislocation structure evolution around the crack wake Reviewed

    Acta Materialia   156   245 - 253   2018.9

     More details

    Language:English   Publishing type:Research paper (scientific journal)  

    DOI: 10.1016/j.actamat.2018.06.041

  • The role of intergranular fracture on hydrogen-assisted fatigue crack propagation in pure iron at a low stress intensity range Reviewed

    Materials Science and Engineering A   733   316 - 328   2018.8

     More details

    Language:English   Publishing type:Research paper (scientific journal)  

    DOI: 10.1016/j.msea.2018.07.014

  • Multi-scale observation of hydrogen-induced, localized plastic deformation in fatigue-crack propagation in a pure iron Reviewed

    Scripta Materialia   140   13 - 17   2017.11

     More details

    Language:English   Publishing type:Research paper (scientific journal)  

    DOI: 10.1016/j.scriptamat.2017.06.037

  • Hydrogen-enhanced fatigue crack growth in steels and its frequency dependence Invited Reviewed International journal

    Hisao Matsunaga, Osamu Takakuwa, Junichiro Yamabe, Saburo Matsuoka

    Philosophical Transactions of the Royal Society A   375 ( 2098 )   1 - 14   2017.6

     More details

    Language:English   Publishing type:Research paper (scientific journal)  

    DOI: 10.1098/rsta.2016.0412

  • Optimum injection pressure of a cavitating jet for introducing compressive residual stress into stainless steel Reviewed International journal

    Hitoshi Soyama, Kazuya Nagasaka, Osamu Takakuwa, Akima Naito

    Journal of Power and Energy Systems   6 ( 2 )   63 - 75   2017.6

     More details

    Language:English   Publishing type:Research paper (scientific journal)  

    DOI: 10.1299/jpes.6.63

  • 岩石のメカノルミネッセンスによる発光における支配因子の検討 Reviewed

    髙桑 脩, 宮坂 晃輔, 祖山 均

    日本機械学会論文集   82 ( 842 )   2017.6

     More details

    Language:Japanese   Publishing type:Research paper (scientific journal)  

    DOI: 10.1299/transjsme.16-00169

  • Hydrogen diffusivity and tensile-ductility loss of solution-treated austenitic stainless steels with external and internal hydrogen Reviewed International journal

    Junichiro Yamabe, Osamu Takakuwa, Hisao Matsunaga, Hisatake Itoga, Saburo Matsuoka

    International Journal of Hydrogen Energy   42 ( 18 )   13289 - 13299   2017.5

     More details

    Language:English   Publishing type:Research paper (scientific journal)  

    DOI: 10.1016/j.ijhydene.2017.04.055

  • Using cavitation peening to enhance the fatigue strength of duralumin plate containing a hole with rounded edges Reviewed International journal

    Osamu Takakuwa, Fumio Takeo, Mitsuru Sato, Hitoshi Soyama

    Surface & Coatings Technology   307   200 - 205   2016.12

     More details

    Language:English   Publishing type:Research paper (scientific journal)  

    DOI: 10.1016/j.surfcoat.2016.08.087

  • Enhancing the durability of spinal implant fixture applications made of Ti-6Al-4V ELI by means of cavitation peening Reviewed International journal

    Osamu Takakuwa, Masaaki Nakai, Kengo Narita, Mitsuo Niinomi, Kazuhiro Hasegawa, Hitoshi Soyama

    International Journal of Fatigue   92   360 - 367   2016.11

     More details

    Language:English   Publishing type:Research paper (scientific journal)  

    DOI: 10.1016/j.ijfatigue.2016.07.021

  • Improvement of fatigue life of welded parts by peening employing cavitating jet and water jet Invited Reviewed International journal

    Hitoshi Soyama, Osamu Takakuwa

    Proceedings of the 11th Pacific Rim International Conference on Water Jet Technology   2016.10

     More details

    Language:English   Publishing type:Research paper (international conference proceedings)  

  • Improvement of the resistance to delayed fracture in high-strength bolt made of Cr-Mo steel by means of cavitation peening Reviewed International journal

    Osamu Takakuwa, Naoki Kumagai, Hitoshi Soyama

    Proceedings of the 6th International Conference on Laser Peening and Related Phenomena   2016.10

     More details

    Language:English   Publishing type:Research paper (international conference proceedings)  

  • キャビテーションピーニングによるクロムモリブデン鋼製ボルトの遅れ破壊耐性の向上 Reviewed

    熊谷 直輝, 髙桑 脩, 祖山 均

    日本機械学会論文集   82 ( 842 )   2016.10

     More details

    Language:Japanese   Publishing type:Research paper (scientific journal)  

    DOI: 10.1299/transjsme.16-00111

  • 水噴流を利用した各種ピーニングによるステンレス鋼溶接部の疲労強度向上 Reviewed

    髙桑 脩, 祖山 均

    噴流工学   33 ( 1 )   4 - 9   2016.6

     More details

    Language:Japanese   Publishing type:Research paper (scientific journal)  

  • 水噴流加速式循環型ショットピーニングによるステンレス鋼の下限応力拡大係数範囲の増大 Reviewed

    髙桑 脩, 内藤 暁馬, 祖山 均

    噴流工学   32 ( 1 )   4 - 9   2016.6

     More details

    Language:Japanese   Publishing type:Research paper (scientific journal)  

  • Using cavitation peening to improve the fatigue life of titanium alloy Ti-6Al-4V manufactured by electron beam melting Reviewed International journal

    Mitsuru Sato, Osamu Takakuwa, Masaaki Nakai, Mitsuo Niinomi, Fumio Takeo, Hitoshi Soyama

    Materials Sciences and Applications   7 ( 4 )   181 - 191   2016.4

     More details

    Language:English   Publishing type:Research paper (scientific journal)  

    DOI: 10.4236/msa.2016.74018

  • Preventing hydrogen diffusion in stainless steel by cavitating jet in air

    O. Takakuwa, H. Soyama

    23rd International Conference on Water Jetting 2016 23rd International Conference on Water Jetting 2016   215 - 221   2016.1

     More details

    Language:English   Publishing type:Research paper (other academic)  

  • 機械的表面改質によるステンレス鋼の水素脆化抑止 Reviewed

    髙桑 脩, 祖山 均

    JCOSSAR2015論文集   128 - 133   2015.10

     More details

    Language:Japanese   Publishing type:Research paper (scientific journal)  

  • Suppression of fatigue crack propagation of duralumin by cavitation peening Reviewed International journal

    Hitoshi Soyama, Naoki Kumagai, Osamu Takakuwa

    The Journal of Engineering   3   2015.7

     More details

    Language:English   Publishing type:Research paper (scientific journal)  

    DOI: 10.1049/joe.2015.0066

  • Preventing hydrogen embrittlement in stainless steel by means of compressive stress induced by cavitation peening Reviewed International journal

    Osamu Takakuwa, Hitoshi Soyama

    The Journal of Engineering   4   2015.7

     More details

    Language:English   Publishing type:Research paper (scientific journal)  

    DOI: 10.1049/joe.2015.0065

  • キャビテーションピーニングによるオーステナイト系ステンレス鋼への水素侵入抑止 Reviewed

    髙桑 脩, 眞野 優太, 祖山 均

    日本機械学会論文集   81 ( 824 )   2015.4

     More details

    Language:Japanese   Publishing type:Research paper (scientific journal)  

    DOI: 10.1299/transjsme.14-00638

  • 微小圧子押込み試験によるオーステナイト系ステンレス鋼の水素侵入量評価 Reviewed

    髙桑 脩, 眞野 優太, 祖山 均

    日本機械学会論文集   81 ( 823 )   2015.3

     More details

    Language:Japanese   Publishing type:Research paper (scientific journal)  

    DOI: 10.1299/transjsme.14-00426

  • Movement of dislocations in the sub-surface of a polycrystalline metal by cavitation peening observed by transmission electron microscopy Reviewed International journal

    Osamu Takakuwa, Akihiko Chiba, Hitoshi Soyama

    Materials Sciences and Applications   6 ( 2 )   140 - 144   2015.2

     More details

    Language:English   Publishing type:Research paper (scientific journal)  

  • Effect of residual stress on the corrosion behavior of austenitic stainless steel Reviewed International journal

    Osamu Takakuwa, Hitoshi Soyama

    Advances in Chemical Engineering and Science   5 ( 1 )   62 - 71   2015.1

     More details

    Language:English   Publishing type:Research paper (scientific journal)  

    DOI: 10.4236/aces.2015.51007

  • Reduction of hydrogen embrittlement cracking of stainless steel SUS316L by cavitation peening Reviewed International journal

    Hitoshi Soyama, Osamu Takakuwa

    Proceedings of the International Congress (APCF/SIF-2014)   401 - 405   2014.12

     More details

    Language:English   Publishing type:Research paper (international conference proceedings)  

  • The Interaction between hydrogen and surface stress in stainless steel Invited Reviewed International journal

    Osamu Takakuwa, Yuta Mano, Hitoshi Soyama

    Proceedings of the 12th International Conference on Material Science and Engineering Technology   1285 - 1289   2014.12

     More details

    Language:English   Publishing type:Research paper (international conference proceedings)  

  • Effect of indentation load on Vickers hardness of austenitic stainless steel after hydrogen charging Reviewed International journal

    Osamu Takakuwa, Yuta Mano, Hitoshi Soyama

    Proceedings of the ASME2014 Pressure Vessels & Piping Conference   2014.7

     More details

    Language:English   Publishing type:Research paper (international conference proceedings)  

  • 脊椎固定用インプラントロッドへの水噴流加速式循環型ショットピーニングの適用 Reviewed

    髙桑 脩, 祖山 均

    噴流工学   31 ( 1 )   20 - 27   2014.6

     More details

    Language:Japanese   Publishing type:Research paper (scientific journal)  

  • Effect of hydrogen on the micro- and macro-strain near the surface of austenitic stainless steel Reviewed International journal

    Osamu Takakuwa, Yuta Mano, Hitoshi Soyama

    Advanced Materials Research   936   1298 - 1302   2014.6

     More details

    Language:English   Publishing type:Research paper (scientific journal)  

  • Increase in the local yield stress near the surface of austenitic stainless steel due to invasion by hydrogen Reviewed International journal

    Osamu Takakuwa, Yuta Mano, Hitoshi Soyama

    International Journal of Hydrogen Energy   39 ( 11 )   6095 - 6103   2014.4

     More details

    Language:English   Publishing type:Research paper (scientific journal)  

    DOI: 10.1016/j.ijhydene.2014.01.190

  • 荷重制御型平面曲げ式疲労試験機による表面改質層における疲労亀裂進展挙動の定量的評価 Reviewed

    髙桑 脩, 左奈田 一将, 祖山 均

    日本機械学会論文集   80 ( 810 )   2014.2

     More details

    Language:Japanese   Publishing type:Research paper (scientific journal)  

    DOI: 10.1299/transjsme.2014smm0022

  • Effect of load current density during the production of Cu2O/Cu solar cells by anodic oxidation on film quality and output power Reviewed

    K. Hasuda, O. Takakuwa, H. Soyama

    Solid-State Electronics   91   130 - 136   2014.1

     More details

    Language:English   Publishing type:Research paper (scientific journal)  

    DOI: 10.1016/j.sse.2013.09.007

  • Effect of nozzle geometry on aggressivity of cavitating jet for cavitation erosion test and applications Reviewed

    Satoshi Nishimura, Osamu Takakuwa, Hitoshi Soyama

    Fluid Mechanics and its Applications   106   283 - 302   2014.1

     More details

    Language:English   Publishing type:Research paper (scientific journal)  

    DOI: 10.1007/978-94-017-8539-6_12

  • Estimation of the yield stress of stainless steel from the Vickers hardness taking account of the residual stress Reviewed International journal

    Osamu Takakuwa, Yusuke Kawaragi, Hitoshi Soyama

    Journal of Surface Engineered Materials and Technology   3 ( 4 )   262 - 268   2013.10

     More details

    Language:English   Publishing type:Research paper (scientific journal)  

  • Introduction of compressive residual stress by means of cavitation peening into a titanium alloy rod used for spinal implants Reviewed International journal

    Osamu Takakuwa, Amrinder S. Gill, Gokul Ramakrishnan, Seetha R. Mannava, Vijay K. Vasudevan, Hitoshi Soyama

    Materials Sciences and Applications   4 ( 7A )   23 - 28   2013.7

     More details

    Language:English   Publishing type:Research paper (scientific journal)  

    DOI: 10.4236/msa.2013.47A2004

  • ショットピーニングによる歯科用材料の機械的特性の向上 Reviewed

    青柳 吉輝, 河原木 雄介, 髙桑 脩, 徳江 藍, 大久保 力廣, 祖山 均

    日本機械学会論文集A編   79 ( 803 )   1019 - 1029   2013.7

     More details

    Language:Japanese   Publishing type:Research paper (scientific journal)  

    DOI: 10.1299/kikaia.79.1019

  • An indicator for the suppression of fatigue crack growth by hybrid peening Reviewed International journal

    Osamu Takakuwa, Kouhei Yamamiya, Hitoshi Soyama

    Journal of Solid Mechanics and Materials Engineering   7 ( 3 )   357 - 371   2013.6

     More details

    Language:English   Publishing type:Research paper (scientific journal)  

    DOI: 10.1299/jmmp.7.357

  • Optimizing the conditions for residual stress measurement using a two-dimensional XRD method with specimen oscillation Reviewed International journal

    Osamu Takakuwa, Hitoshi Soyama

    Advances in Materials Physics and Chemistry   3 ( 1A )   8 - 18   2013.4

     More details

    Language:English   Publishing type:Research paper (scientific journal)  

    DOI: 10.4236/ampc.2013.31A002

  • Similarity law on shedding frequency of cavitation cloud induced by a cavitating jet Reviewed International journal

    Satoshi Nishimura, Osamu Takakuwa, Hitoshi Soyama

    Journal of Fluid Science and Technology   7 ( 3 )   405 - 420   2012.12

     More details

    Language:English   Publishing type:Research paper (scientific journal)  

    DOI: 10.1299/jfst.7.405

  • Technique for partially strengthening electrical steel sheet of IPM motor using cavitation peening Reviewed

    Osamu Takakuwa, M. Nishikawa, H. Soyama

    Energy Materials: Materials Science and Engineering for Energy Systems   6 ( 1 )   1422 - 1426   2012.12

     More details

    Language:English   Publishing type:Research paper (scientific journal)  

  • Effect of the impact energy of various peening techniques on the induced plastic deformation region Reviewed International journal

    Shinya Kanou, Osamu Takakuwa, Seetha R. Mannava, Dong Qian, Vijay K. Vasudevan, Hitoshi Soyama

    Journal of Materials Processing Technology   212 ( 10 )   1998 - 2006   2012.10

     More details

    Language:English   Publishing type:Research paper (scientific journal)  

    DOI: 10.1016/j.jmatprotec.2012.05.003

  • Effect of nozzle shape for high injection pressure on aggressivity of cavitating jet Reviewed International journal

    Hitoshi Soyama, Osamu Takakuwa, Akima Naito

    Proceedings of the 21th International Conference on Water Jetting   ( 367 )   378   2012.9

     More details

    Language:English   Publishing type:Research paper (international conference proceedings)  

  • Estimation of the depth of surface modification layer induced by cavitation peening Reviewed International journal

    Osamu Takakuwa, Masaaki Nishikawa, Hitoshi Soyama

    Journal of Materials Processing Technology   212 ( 8 )   1716 - 1722   2012.8

     More details

    Language:English   Publishing type:Research paper (scientific journal)  

    DOI: 10.1016/j.jmatprotec.2012.03.010

  • The effect of scanning pitch of nozzle for a cavitating jet during overlapping peening treatment Reviewed International journal

    Osamu Takakuwa, Hitoshi Soyama

    Surface & Coatings Technology   206 ( 23 )   4756 - 4762   2012.7

     More details

    Language:English   Publishing type:Research paper (scientific journal)  

    DOI: 10.1016/j.surfcoat.2012.03.034

  • Using an indentation test to evaluate the effect of cavitation peening on the invasion of the surface of austenitic stainless steel by hydrogen Reviewed International journal

    Osamu Takakuwa, Hitoshi Soyama

    Surface & Coatings Technology   206 ( 18 )   3747 - 3750   2012.5

     More details

    Language:English   Publishing type:Research paper (scientific journal)  

    DOI: 10.1016/j.surfcoat.2012.03.027

  • Suppression of hydrogen-assisted fatigue crack growth in austenitic stainless steel by cavitation peening Reviewed International journal

    Osamu Takakuwa, Hitoshi Soyama

    International Journal of Hydrogen Energy   37 ( 6 )   5268 - 5276   2012.3

     More details

    Language:English   Publishing type:Research paper (scientific journal)  

    DOI: 10.1016/j.ijhydene.2011.12.035

  • Numerical simulation of the effects of residual stress on the concentration of hydrogen around a crack tip Reviewed International journal

    Osamu Takakuwa, Masaaki Nishikawa, Hitoshi Soyama

    Surface & Coatings Technology   206 ( 11-12 )   2892 - 2898   2012.2

     More details

    Language:English   Publishing type:Research paper (scientific journal)  

    DOI: 10.1016/j.surfcoat.2011.12.018

  • Development of peening technique using recirculating shot accelerated by water jet Reviewed International journal

    Akima Naito, Osamu Takakuwa, Hitoshi Soyama

    Materials Science and Technology   28 ( 2 )   234 - 239   2012.2

     More details

    Language:English   Publishing type:Research paper (scientific journal)  

    DOI: 10.1179/1743284711Y.0000000027

  • Effect of injection pressure and size of nozzle throat of a cavitating jet on cavitation peening Reviewed International journal

    Hitoshi Soyama, Osamu Takakuwa, Akima Naito

    Proceedings of the 11th International Conference on Shot Peening   129 - 134   2011.9

     More details

    Language:English   Publishing type:Research paper (international conference proceedings)  

  • 水噴流加速式循環型ショットピーニングによるステンレス鋼の水素脆化抑止 Reviewed

    内藤 暁馬, 髙桑 脩, 祖山 均

    噴流工学   28 ( 2 )   12 - 17   2011.6

     More details

    Language:Japanese   Publishing type:Research paper (scientific journal)  

  • Suppression of fatigue crack growth in austenite stainless steel by cavitation peening Reviewed International journal

    Osamu Takakuwa, Masaaki Nishikawa, Hitoshi Soyama

    Key Engineering Materials   452-453   641 - 644   2011.6

     More details

    Language:English   Publishing type:Research paper (scientific journal)  

  • Enhancing the aggressive strength of a cavitating jet and its practical application Reviewed International journal

    Hitoshi Soyama, Osamu Takakuwa

    Journal of Fluid Science and Technology   6 ( 4 )   510 - 521   2011.6

     More details

    Language:English   Publishing type:Research paper (scientific journal)  

    DOI: 10.1299/jfst.6.510

  • Suppression of fatigue crack propagation with hydrogen embrittlement in stainless steel by cavitation peening Reviewed International journal

    Osamu Takakuwa, Toshihito Ohmi, Masaaki Nishikawa, A. Toshimitsu Yokobori, Jr., Hitoshi Soyama

    Strength, Fracture and Complexity   7 ( 1 )   79 - 85   2011.2

     More details

    Language:English   Publishing type:Research paper (scientific journal)  

    DOI: 10.3233/SFC-2011-0126

  • Introduction of compressive residual stress into stainless steel by employing a cavitating jet in air Reviewed International journal

    Hitoshi Soyama, Tsutomu Kikuchi, Masaaki Nishikawa, Osamu Takakuwa

    Surface & Coatings Technology   205 ( 10 )   3167 - 3174   2011.2

     More details

    Language:English   Publishing type:Research paper (scientific journal)  

    DOI: 10.1016/j.surfcoat.2010.11.031

  • キャビテーションピーニングを受けたステンレス鋼の表面改質層の降伏応力分布と疲労特性の評価 Reviewed

    髙桑 脩, 西川 雅章, 祖山 均

    日本機械学会論文集A編   76 ( 770 )   1367 - 1372   2010.10

     More details

    Language:Japanese   Publishing type:Research paper (scientific journal)  

  • Evaluation of yield stress distribution in the surface layer and fatigue properties of the stainless steel modified by cavitation peening Reviewed

    Masaaki Nishikawa, Osamu Takakuwa, Hitoshi Soyama

    Nihon Kikai Gakkai Ronbunshu, A Hen/Transactions of the Japan Society of Mechanical Engineers, Part A   76 ( 770 )   1367 - 1372   2010.10

     More details

    Language:English   Publishing type:Research paper (scientific journal)  

    DOI: 10.1299/kikaia.76.1367

  • Release of micro strain in tool alloy steel by a cavitating jet in air Reviewed International journal

    Hitoshi Soyama, Nao Yamada, Osamu Takakuwa, Yuichi Sekine, Mitsuhiro Mikami

    Proceedings of the 19th International Conference on Water Jetting   219 - 228   2008.10

     More details

    Language:English   Publishing type:Research paper (international conference proceedings)  

▼display all

Books

  • Hydrogen Gas Embrittlement: Mechanisms, Mechanics, and Design

    Hisao MATSUNAGA, Junichiro YAMABE, Osamu TAKAKUWA, Yuhei OGAWA, Saburo MATSUOKA( Role: Joint author)

    Elsevier  2024.1 

     More details

    Responsible for pages:eBook ISBN: 9780323853330   Language:English   Book type:Scholarly book

  • Advanced Experimental and Numerical Techniques for Cavitation Erosion Prediction, Chapter 12, Effect of Nozzle Geometry on Aggressivity of Cavitating Jet for Cavitation Erosion Test and Applications

    Satoshi Nishimura, Osamu Takakuwa, Hitoshi Soyama( Role: Joint author)

    Springer  2014.7 

     More details

    Language:English   Book type:Scholarly book

  • 水素利用技術集成Vol.4

    高桑脩 他多数( Role: Joint author)

    2014.4 

     More details

    Language:Japanese   Book type:Scholarly book

Presentations

  • 水素脆性による力学特性の低下とその分析法 Invited

    髙桑脩

    安全・安心な社会を築く先進材料・非破壊計測技術シンポジウム  2024.3 

     More details

    Event date: 2024.4

    Language:Japanese   Presentation type:Oral presentation (invited, special)  

    Country:Japan  

  • First-principles study on the hydrogen absorption energy in Fe-Cr-Ni austenitic systems: Effect of Cr and Ni content International conference

    Junichiro MORIYAMA, Osamu TAKAKUWA, Masatake YAMAGUCHI, Yuhei OGAWA, Kaneaki TSUZAKI

    5th International Conference on Structural Integrity (ICSI 2023)  2023.8 

     More details

    Event date: 2024.4

    Language:English   Presentation type:Oral presentation (general)  

    Country:Portugal  

  • Hydrogen-assisted fatigue crack propagation in ferritic iron: An overview of macroscale behavior and microscale mechanisms International conference

    Yuhei OGAWA, Osamu TAKAKUWA

    5th International Conference on Structural Integrity (ICSI 2023)  2023.8 

     More details

    Event date: 2024.4

    Language:English   Presentation type:Oral presentation (general)  

    Country:Portugal  

  • Hydrogen-accelerated/decelerated fatigue crack propagation in Ni-based superalloy 718 Invited International conference

    Osamu TAKAKUWA, Yuhei OGAWA

    5th International Conference on Structural Integrity (ICSI 2023)  2023.8 

     More details

    Event date: 2024.4

    Language:English   Presentation type:Oral presentation (general)  

    Country:Portugal  

  • 3D in situ observation for strain-induced martensitic transformation in austenitic steel by synchrotron X-ray International conference

    #Tatsuya IWANO, Osamu TAKAKUWA, Kyosuke HIRAYAMA, Hiroyuki TODA

    FEMS EUROMAT23  2023.9 

     More details

    Event date: 2024.4

    Language:English   Presentation type:Oral presentation (general)  

    Country:Germany  

  • First-principles study on the hydrogen absorption energy in Fe-Cr-Ni austenitic systems: Effect of Cr and Ni content International conference

    #Junichiro MORIYAMA, Osamu TAKAKUWA, Masatake YAMAGUCHI, Yuhei OGAWA, Kaneaki TSUZAKI

    FEMS EUROMAT23  2023.9 

     More details

    Event date: 2024.4

    Language:English   Presentation type:Oral presentation (general)  

    Country:Germany  

  • シンクロトロン放射光によるオーステナイト鋼のひずみ誘起マルテンサイト変態の3次元その場観察

    #岩野竜也, 髙桑脩, 平山恭介, 戸田裕之

    日本鉄鋼協会第186回秋季講演大会  2023.9 

     More details

    Event date: 2024.4

    Language:Japanese   Presentation type:Oral presentation (general)  

    Venue:富山大学   Country:Japan  

  • 第一原理計算を用いたFe-Cr-Niオーステナイト合金中への水素固溶特性の検討:平均および局所水素濃度に与えるCr・Ni原子の影響

    #森山潤一朗, 髙桑脩, 山口正剛, 小川祐平, 津﨑兼彰

    日本鉄鋼協会第186回秋季講演大会  2023.9 

     More details

    Event date: 2024.4

    Language:Japanese   Presentation type:Oral presentation (general)  

    Venue:富山大学   Country:Japan  

  • 転位-水素相互作用の熱活性化過程に着目した低炭素鋼の水素助長疲労き裂進展メカニズム

    髙桑脩, 小川祐平

    日本鉄鋼協会第186回秋季講演大会  2023.9 

     More details

    Event date: 2024.4

    Language:Japanese   Presentation type:Oral presentation (general)  

    Venue:富山大学   Country:Japan  

  • Ni基超合金718における水素脆性き裂の発生クライテリア

    小川祐平, 野口耕平, 髙桑脩

    日本鉄鋼協会第187回春季講演大会  2024.3 

     More details

    Event date: 2024.4

    Language:Japanese   Presentation type:Oral presentation (general)  

    Venue:東京理科大学   Country:Japan  

  • 内部水素による析出強化型Ni基超合金718の疲労き裂進展加速/減速現象

    髙桑脩, 小川祐平

    日本材料学会第8回マルチスケール材料力学シンポジウム  2023.5 

     More details

    Event date: 2023.5

    Language:Japanese   Presentation type:Oral presentation (general)  

    Venue:つくば国際会議場   Country:Japan  

  • シンクロトロン放射光によるオーステナイト鋼におけるひずみ誘起マルテンサイト変態のその場観察

    岩野竜也,髙桑脩, 平山恭介,戸田裕之

    日本材料学会第8回マルチスケール材料力学シンポジウム  2023.5 

     More details

    Event date: 2023.5

    Language:Japanese   Presentation type:Oral presentation (general)  

    Venue:つくば国際会議場   Country:Japan  

  • 第一原理計算を用いたFe-Cr-Niオーステナイト合金への水素固溶特性の検討:水素溶解エネルギーと局所濃度分布に対するCr原子の役割

    森山潤一朗,髙桑脩, 山口正剛,小川祐平,津﨑兼彰

    日本材料学会第8回マルチスケール材料力学シンポジウム  2023.5 

     More details

    Event date: 2023.5

    Language:Japanese   Presentation type:Oral presentation (general)  

    Venue:つくば国際会議場   Country:Japan  

  • Ni基超合金718の水素誘起き裂進展下限界:粒界析出物δ相の影響

    髙桑脩, 竹中修平

    日本鉄鋼協会第185回春季講演大会  2023.3 

     More details

    Event date: 2023.3

    Language:Japanese   Presentation type:Oral presentation (general)  

    Venue:東京大学   Country:Japan  

  • シンクロトロン放射光によるオーステナイト鋼のひずみ誘起マルテンサイト変態の3次元その場観察

    岩野竜也,髙桑脩,平山恭介,戸田裕之

    日本鉄鋼協会第185回春季講演大会  2023.3 

     More details

    Event date: 2023.3

    Language:Japanese  

    Venue:東京大学   Country:Japan  

  • Hydrogen-accelerated / decelerated fatigue crack propagation in Nickel-based superalloy 718 Invited International conference

    Osamu Takakuwa, Yuhei Ogawa

    International Symposium on Hydrogen Embrittlement in Nickel-based Superalloys  2022.12 

     More details

    Event date: 2022.12

    Language:English   Presentation type:Oral presentation (general)  

    Country:Norway  

  • Gaseous hydrogen-assisted failure in Ni-based alloy 718 during tensile test: phenomenological understanding and mechanisms Invited International conference

    Yuhei Ogawa, Osamu Takakuwa

    International Symposium on Hydrogen Embrittlement in Nickel-based Superalloys  2022.12 

     More details

    Event date: 2022.12

    Language:English   Presentation type:Oral presentation (general)  

    Country:Norway  

  • 第一原理計算に基づくFe-Cr-Ni合金の水素占有率予測モデルの構築とその評価

    森山潤一郎,髙桑脩

    日本鉄鋼協会第184回春季講演大会  2022.9 

     More details

    Event date: 2022.9

    Language:Japanese  

    Venue:福岡工業大学   Country:Japan  

  • Ni基超合金718のき裂進展下限界値に及ぼす固溶水素の影響

    竹中修平, 髙桑脩

    日本鉄鋼協会第183回春季講演大会  2022.3 

     More details

    Event date: 2022.6

    Language:Japanese   Presentation type:Oral presentation (general)  

    Venue:オンライン   Country:Japan  

  • 析出硬化型Ni基超合金Alloy718 のき裂進展下限界に及ぼす固溶水素の影響

    竹中修平, 髙桑脩

    日本機械学会M&M材料力学カンファレンス2021  2021.3 

     More details

    Event date: 2022.6

    Language:Japanese   Presentation type:Oral presentation (general)  

    Venue:オンライン   Country:Japan  

  • 水素ガス環境下における炭素鋼の疲労き裂進展温度依存性/負荷周波数依存性

    石井悠太郎, 髙桑脩

    日本機械学会M&M材料力学カンファレンス2021  2021.9 

     More details

    Event date: 2022.6

    Language:Japanese   Presentation type:Oral presentation (general)  

    Venue:オンライン   Country:Japan  

  • Ni基超合金の水素誘起疲労き裂進展加速/減速現象

    髙桑脩, 宮田龍之介, 小川祐平

    日本鉄鋼協会第183回春季講演大会  2022.3 

     More details

    Event date: 2022.6

    Language:Japanese   Presentation type:Oral presentation (general)  

    Venue:オンライン   Country:Japan  

  • Fe-Cr-Ni原子構造の水素溶解エネルギーに及ぼすNiおよびCrの影響に関する第一原理計算

    森山潤一郎, 髙桑脩, 山口正剛, 小川祐平, 津﨑兼彰

    日本鉄鋼協会第183回春季講演大会  2022.3 

     More details

    Event date: 2022.6

    Language:Japanese   Presentation type:Oral presentation (general)  

    Venue:オンライン   Country:Japan  

  • 温度依存性に着目した炭素鋼の水素助長疲労き裂進展加速メカニズム

    髙桑脩, 小川祐平, 岡崎三郎, 松永久生

    日本鉄鋼協会第179回春季講演大会  2020.3 

     More details

    Event date: 2022.6

    Language:Japanese   Presentation type:Oral presentation (general)  

    Venue:東京   Country:Japan  

  • レーザー溶接部における新たな疲労き裂進展試験法の開発と溶接部の強度特性に及ぼす水素の影響

    髙桑脩, 松永久生, 西村貴郎, 國立悦生, 宮本宜幸

    溶接構造シンポジウム2019  2019.12 

     More details

    Event date: 2019.12

    Language:Japanese   Presentation type:Oral presentation (general)  

    Venue:大阪大学   Country:Japan  

  • Ni基超合金718における特異な水素誘起き裂進展挙動

    宮田龍之介, 髙桑脩, 小川祐平, 松永久生

    日本機械学会九州支部沖縄講演会  2019.11 

     More details

    Event date: 2019.11

    Language:Japanese   Presentation type:Oral presentation (general)  

    Venue:琉球大学   Country:Japan  

  • 高圧水素環境下におけるBCC鋼の水素誘起疲労き裂進展加速メカニズム-汎用鋼における水素脆化の温度依存性-

    髙桑脩, 小川祐平, 松永久生

    日本機械学会M&M若手シンポジウム2019  2019.8 

     More details

    Event date: 2019.8

    Language:Japanese   Presentation type:Oral presentation (general)  

    Venue:KKR伊豆長岡   Country:Japan  

  • 高圧水素ガス中におけるオーステナイト系ステンレス鋼の強度特性

    髙桑脩, 岡﨑三郎, 山辺純一郎, 松永久生, 松岡三郎

    溶接学会平成30年度秋季全国大会  2018.9 

     More details

    Event date: 2019.6

    Language:Japanese   Presentation type:Oral presentation (general)  

    Venue:愛媛大学   Country:Japan  

  • 外部水素と内部水素に着目したオーステナイト系ステンレス鋼のSSRT破壊形態の分類

    髙桑脩, 山辺純一郎, 松永久生, 古谷佳之, 松岡三郎

    日本鉄鋼協会第173回春季講演大会  2017.3 

     More details

    Event date: 2019.6

    Language:Japanese   Presentation type:Oral presentation (general)  

    Venue:首都大学東京   Country:Japan  

  • 外部水素と内部水素に着目した低合金鋼および炭素鋼の破壊形態の検証

    髙桑脩, 山辺純一郎, 松永久生, 古谷佳之, 松岡三郎

    日本鉄鋼協会第174回秋季講演大会  2017.9 

     More details

    Event date: 2019.6

    Language:Japanese   Presentation type:Oral presentation (general)  

    Venue:北海道大学   Country:Japan  

  • 鉄基超合金A286の破壊形態に及ぼす内部水素の影響

    髙桑脩, 小川祐平, 山辺純一郎, 松永久生

    日本機械学会M&M2017材料力学カンファレンス  2017.9 

     More details

    Event date: 2019.6

    Language:Japanese   Presentation type:Oral presentation (general)  

    Venue:北海道大学   Country:Japan  

  • Compatibility of Type 304 Stainless Steel to High-Pressure Hydrogen Gas Invited International conference

    Osamu TAKAKUWA, Junichiro YAMABE, Hisao MATSUNAGA, Saburo MATSUOKA

    HYDROGENIUS, I2CNER & HydroMate Joint Research Symposium 2018  2018.2 

     More details

    Event date: 2019.6

    Language:English   Presentation type:Oral presentation (general)  

    Country:Japan  

  • 水素ガス環境下における低炭素鋼SM490Bの疲労き裂進展の温度依存性

    髙桑脩, 岡﨑三郎, 山辺純一郎, 松永久生, 松岡三郎

    日本鉄鋼協会第175回春季講演大会  2018.3 

     More details

    Event date: 2019.6

    Language:Japanese   Presentation type:Oral presentation (general)  

    Venue:千葉工業大学   Country:Japan  

  • 鉄基超合金A286の水素誘起破壊メカニズム

    髙桑脩,小川祐平,山辺純一郎,松永久生

    日本鉄鋼協会第176回秋季講演大会  2018.9 

     More details

    Event date: 2019.6

    Language:Japanese   Presentation type:Oral presentation (general)  

    Venue:東北大学   Country:Japan  

  • 高圧水素ガス中におけるオーステナイト系ステンレス鋼の強度特性

    髙桑脩, 岡﨑三郎, 山辺純一郎, 松永久生, 松岡三郎

    溶接学会平成30年度秋季全国大会  2018.9 

     More details

    Event date: 2019.6

    Language:Japanese   Presentation type:Oral presentation (general)  

    Venue:愛媛大学   Country:Japan  

  • Osamu TAKAKUWA, Yuhei OGAWA, Junichiro YAMABE, Hisao MATSUNAGA International conference

    Peculiar Temperature Dependence of Hydrogen-Assisted Fatigue Crack Growth of Low-Carbon Steel in Gaseous Hydrogen

    Japan-Korea-China Joint Workshop on Hydrogen Materials 2019  2019.4 

     More details

    Event date: 2019.4

    Language:English   Presentation type:Oral presentation (general)  

    Country:Japan  

  • Fe-Ni-Crオーステナイト鋼における水素誘起変形双晶の連続EBSD観察

    小川祐平, 西田会希, 髙桑脩, 津﨑兼彰

    日本鉄鋼協会第186回秋季講演大会  2023.9 

     More details

    Event date: 2024.4

    Language:Japanese   Presentation type:Oral presentation (general)  

    Venue:富山大学   Country:Japan  

  • Fatigue crack propagation in ferritic iron under pressurized gaseous hydrogen International conference

    Yuhei OGAWA, Osamu TAKAKUWA

    FEMS EUROMAT23  2023.9 

     More details

    Event date: 2024.4

    Language:English   Presentation type:Oral presentation (general)  

    Country:Germany  

  • Ni基超合金Alloy718の水素ガス環境脆化:支配要因とメカニズム

    小川祐平,野口耕平,髙桑脩

    日本鉄鋼協会第185回春季講演大会  2023.3 

     More details

    Event date: 2023.3

    Language:Japanese   Presentation type:Oral presentation (general)  

    Venue:東京大学   Country:Japan  

  • オーステナイト鋼における水素による固溶強化の元素濃度・試験温度依存性

    小川祐平,髙桑脩, 津﨑兼彰

    日本鉄鋼協会第184回春季講演大会  2022.9 

     More details

    Event date: 2022.9

    Language:Japanese   Presentation type:Oral presentation (general)  

    Venue:福岡工業大学   Country:Japan  

  • き裂先端部の塑性域寸法に及ぼす高圧水素ガス環境の影響 —低合金鋼 SCM435 における単一 過大荷重負荷後の疲労き裂遅延現象にもとづく考察—

    岩田圭一郎, 中村眞実, 岡﨑三郎, 松原和輝, 髙桑脩, 小川祐平, 松永久生

    日本機械学会M&M材料力学カンファレンス2021  2021.9 

     More details

    Event date: 2022.6

    Language:Japanese   Presentation type:Oral presentation (general)  

    Venue:オンライン   Country:Japan  

  • Ni基超合金718の引張特性に及ぼす内部・外部水素の影響とその温度依存性

    野口耕平, 小川祐平, 髙桑脩, 松永久生

    日本鉄鋼協会第180回秋季講演大会  2020.9 

     More details

    Event date: 2022.6

    Language:Japanese   Presentation type:Oral presentation (general)  

    Venue:オンライン   Country:Japan  

  • 高圧水素ガス中における低合金鋼SCM435の疲労き裂進展特性に対する単一過大荷重の影響

    岩田圭一郎, 中村眞実, 岡﨑三郎, 小川祐平, 髙桑脩, 松永久生, 松原和輝

    日本鉄鋼協会第180回秋季講演大会  2020.9 

     More details

    Event date: 2022.6

    Language:Japanese   Presentation type:Oral presentation (general)  

    Venue:オンライン   Country:Japan  

  • Investigation of material compatibility to high-pressure hydrogen-gas Invited International conference

    Osamu TAKAKUWA

    International Conference on Flow Dynamics 2020  2020.10 

     More details

    Event date: 2022.6

    Language:English   Presentation type:Oral presentation (general)  

    Country:Japan  

  • BCC鉄中における水素助長疲労き裂進展の巨視的挙動と微視的メカニズム

    小川祐平, 髙桑脩, 松永久生

    2020.12 

     More details

    Event date: 2022.6

    Language:Japanese   Presentation type:Oral presentation (general)  

    Venue:オンライン   Country:Japan  

  • 温度依存性に着目したbcc鋼の水素助長疲労き裂進展加速メカニズム Invited

    髙桑脩

    ESISM第11回プラストンに基づく変形現象研究会  2021.1 

     More details

    Event date: 2022.6

    Language:Japanese   Presentation type:Oral presentation (general)  

    Venue:オンライン   Country:Japan  

  • 鉄鋼の高強度・高延性化元素としての水素の新たな一面:Fe-Cr-Ni基合金での一例

    小川祐平, 細井日向, 津﨑兼彰, 髙桑脩, 松永久生

    日本鉄鋼協会 第181回春季講演大会  2021.3 

     More details

    Event date: 2022.6

    Language:Japanese   Presentation type:Oral presentation (general)  

    Venue:オンライン   Country:Japan  

  • 水素固溶に伴うオーステナイト鋼の強度・延性向上効果に対するCr・Ni量の影響

    西田会希, 小川祐平, 松永久生, 髙桑脩, 津﨑兼彰

    日本鉄鋼協会 第181回春季講演大会  2021.3 

     More details

    Event date: 2022.6

    Language:Japanese   Presentation type:Oral presentation (general)  

    Venue:オンライン   Country:Japan  

  • 水素チャージしたNi基超合金718の引張特性に及ぼす試験温度の影響,

    野口耕平, 小川祐平, 髙桑脩, 松永久生

    日本機械学会九州支部 第74期総会・講演会  2021.3 

     More details

    Event date: 2022.6

    Language:Japanese   Presentation type:Oral presentation (general)  

    Venue:オンライン   Country:Japan  

  • 高圧水素ガス中における低合金鋼SCM435の単一過大荷重負荷後の疲労き裂進展挙動

    岩田圭一郎, 中村眞実, 岡﨑三郎, 松原和輝, 髙桑脩, 小川祐平, 松永久生

    日本機械学会九州支部 第74期総会・講演会  2021.3 

     More details

    Event date: 2022.6

    Language:Japanese   Presentation type:Oral presentation (general)  

    Venue:オンライン   Country:Japan  

  • 水素チャージに伴うオーステナイト系ステンレス鋼310Sの高強度・高延性化とそのメカニズム

    小川祐平, 細井日向, 津﨑兼彰, 髙桑脩, 松永久生

    日本鉄鋼協会第179回春季講演大会  2020.3 

     More details

    Event date: 2022.6

    Language:Japanese   Presentation type:Oral presentation (general)  

    Venue:東京   Country:Japan  

  • Temperature dependence of hydrogen-assisted fatigue crack growth of ferrite-pearlite steel in gaseous environment Invited International conference

    Osamu TAKAKUWA, Yuhei OGAWA, Hisao MATSUNAGA

    Joint Research Symposium -Hydrogen-Material Interactions-  2020.1 

     More details

    Event date: 2022.6

    Language:English   Presentation type:Oral presentation (general)  

    Country:Japan  

  • 純ニッケルおよび銅ニッケル合金の引張破壊に及ぼす内部水素の影響と温度依存性

    和田健太郎, 山辺純一郎, 小川祐平, 髙桑脩, 飯島高志, 松永久生

    日本機械学会M&M材料力学カンファレンス2019  2019.11 

     More details

    Event date: 2019.11

    Language:Japanese   Presentation type:Oral presentation (general)  

    Venue:九州大学   Country:Japan  

  • 固溶水素による析出強化型Fe基超合金A286の延性低下メカニズム

    細井日向, 髙桑脩, 小川祐平, 松永久生

    日本機械学会M&M材料力学カンファレンス2019  2019.11 

     More details

    Event date: 2019.11

    Language:Japanese   Presentation type:Oral presentation (general)  

    Venue:九州大学   Country:Japan  

  • 内部水素による析出強化型Fe基超合金A286の延性低下メカニズム

    細井日向, 髙桑脩, 小川祐平, 松永久生

    第9回構造物の安全性・信頼性に関する国内シンポジウムJCOSSAR2019  2019.10 

     More details

    Event date: 2019.10

    Language:Japanese   Presentation type:Oral presentation (general)  

    Venue:日本学術会議   Country:Japan  

  • BCC鋼の水素環境での疲労き裂進展特性

    松永久生, 小川祐平, 髙桑脩

    日本鉄鋼協会第178回秋季講演大会  2019.9 

     More details

    Event date: 2019.9

    Language:Japanese   Presentation type:Oral presentation (general)  

    Venue:岡山大学   Country:Japan  

  • 内部水素および外部水素環境下におけるNi基超合金Alloy718の水素脆性破壊挙動

    小川祐平, 髙桑脩, 岡崎三郎, 沖田耕一, 船越裕亮, 松永久生, 松岡三郎

    日本鉄鋼協会第178回秋季講演大会  2019.9 

     More details

    Event date: 2019.9

    Language:Japanese   Presentation type:Oral presentation (general)  

    Venue:岡山大学   Country:Japan  

  • 高圧水素環境下におけるBCC鋼の水素誘起疲労き裂進展加速メカニズム-モデル材料純鉄における変形組織への水素の影響-

    小川祐平, 髙桑脩, 松永久生

    日本機械学会M&M若手シンポジウム2019  2019.8 

     More details

    Event date: 2019.8

    Language:Japanese   Presentation type:Oral presentation (general)  

    Venue:KKR伊豆長岡   Country:Japan  

  • Recent Progress in the Study on Strength Properties of Metallic Materials in High-Pressure Hydrogen Environments Invited International conference

    Hisao MATSUNAGA, Osamu TAKAKUWA, Junichiro YAMABE

    The 8th World Hydrogen Technologies Convention (WHTC2019)  2019.6 

     More details

    Event date: 2019.6

    Language:English   Presentation type:Oral presentation (general)  

    Country:Japan  

  • SSRT特性に及ぼす外部水素と内部水素の影響

    36. 髙桑脩, 山辺純一郎, 松永久生, 古谷佳之, 松岡三郎

    日本鉄鋼協会「水素脆化の基本要因と特性評価」研究会  2016.11 

     More details

    Event date: 2019.6

    Language:Japanese   Presentation type:Oral presentation (general)  

    Venue:上智大学   Country:Japan  

  • 外部水素と内部水素に着目したオーステナイト系ステンレス鋼の引張特性に及ぼす水素の影響

    髙桑脩, 山辺純一郎, 松永久生, 古谷佳之, 松岡三郎

    東京オリンピックで水素社会を実証するための技術課題に関する研究分科会  2017.2 

     More details

    Event date: 2019.6

    Language:Japanese   Presentation type:Oral presentation (general)  

    Venue:トヨタ自動車東日本株式会社   Country:Japan  

  • 高圧水素ガス環境へのSUS304の適合性評価

    髙桑脩, 松永久生, 山辺純一郎

    日本鉄鋼協会「水素脆化の基本要因と特性評価」研究会  2017.8 

     More details

    Event date: 2019.6

    Language:Japanese   Presentation type:Oral presentation (general)  

    Venue:上智大学   Country:Japan  

  • マルチスケール観察手法を用いた純鉄の水素助長疲労き裂進展機構に関する検討

    小川祐平, Domas BIRENIS, 松永久生, 髙桑脩, 山辺純一郎

    日本鉄鋼協会第174回秋季講演大会  2017.9 

     More details

    Event date: 2019.6

    Language:Japanese   Presentation type:Oral presentation (general)  

    Venue:北海道大学   Country:Japan  

  • Ni基超合金718の疲労寿命限度特性に及ぼす内部水素の影響

    坂田優太, 髙桑脩, 岡﨑三郎, 山辺純一郎, 松岡三郎, 松永久生, 竹腰正雄, 砂川英生, 小林悌宇, 沖田耕一

    日本材料学会九州支部第4回学術講演会  2017.11 

     More details

    Event date: 2019.6

    Language:Japanese   Presentation type:Oral presentation (general)  

    Venue:沖縄県青年会館   Country:Japan  

  • 水素ガス中における純鉄の疲労き裂進展加速機構に関する微視的検討

    小川祐平, Domas BIRENIS, 松永久生, 髙桑脩, 山辺純一郎

    日本材料学会九州支部第4回学術講演会  2017.11 

     More details

    Event date: 2019.6

    Language:Japanese   Presentation type:Oral presentation (general)  

    Venue:沖縄県青年会館   Country:Japan  

  • 軸受鋼SUJ2の水素侵入特性に及ぼす表面処理の影響

    松永久生, 高越大輝, 髙桑脩, 山辺純一郎, 松岡三郎, 山田紘樹, 宇山英幸

    日本鉄鋼協会2017年度「水素脆化の基本要因と特性評価」研究会  2017.12 

     More details

    Event date: 2019.6

    Language:Japanese   Presentation type:Oral presentation (general)  

    Venue:ネツレン株式会社   Country:Japan  

  • Interpretation of Hydrogen-Assisted Fatigue Crack Propagation in a Pure BCC Iron Based on Crack Tip Plasticity Evolution Invited International conference

    Yuhei OGAWA, Domas BIRENIS, Hisao MATSUNAGA, Osamu TAKAKUWA, Junichiro YAMABE

    HYDROGENIUS, I2CNER & HydroMate Joint Research Symposium 2018  2018.2 

     More details

    Event date: 2019.6

    Language:English   Presentation type:Oral presentation (general)  

    Country:Japan  

  • Ni基超合金718の疲労限度特性に及ぼす微小欠陥の影響

    ケビンサニー, 岡﨑三郎, 髙桑脩, 山辺純一郎, 松永久生, 松岡三郎, 竹腰正雄, 砂川英生, 小林悌宇, 沖田耕一

    日本機械学会九州支部第71期総会・講演会  2018.3 

     More details

    Event date: 2019.6

    Language:Japanese   Presentation type:Oral presentation (general)  

    Venue:九州大学   Country:Japan  

  • き裂先端の変形組織に基づいた純鉄中の水素助長疲労き裂進展加速機構に関する検討

    小川祐平, Domas BIRENIS, 松永久生, 髙桑脩, 山辺純一郎

    日本機械学会九州支部第71期総会・講演会  2018.3 

     More details

    Event date: 2019.6

    Language:Japanese   Presentation type:Oral presentation (general)  

    Venue:九州大学   Country:Japan  

  • 準安定オーステナイト系ステンレス鋼中の疲労き裂進展加速に対する内部水素と外部水素の役割

    小川祐平, 岡﨑三郎, 髙桑脩, 松永久生

    日本鉄鋼協会第175回春季講演大会  2018.3 

     More details

    Event date: 2019.6

    Language:Japanese   Presentation type:Oral presentation (general)  

    Venue:千葉工業大学   Country:Japan  

  • 水素ガス環境中での疲労き裂進展の加速におけるき裂先端の水素濃度分布と転位水素占有率の重要性 Invited

    松永久生, 髙桑脩, 小川祐平, 山辺純一郎, 松岡三郎

    日本高圧力技術協会HPI技術セミナー「水素社会の実現に向けた学識と実践の融合」  2018.6 

     More details

    Event date: 2019.6

    Language:Japanese   Presentation type:Oral presentation (invited, special)  

    Venue:エッサム神田   Country:Japan  

  • 高圧水素ガス中におけるBCC鋼の疲労き裂進展加速メカニズム

    小川祐平, Domas BIRENIS, 髙桑脩, 山辺純一郎, 松永久生

    日本鉄鋼協会2018年度「水素脆化の基本要因と特性評価」研究会  2018.9 

     More details

    Event date: 2019.6

    Language:Japanese   Presentation type:Oral presentation (general)  

    Venue:上智大学   Country:Japan  

  • 水素ガス環境中疲労き裂進展過程におけるBCC鉄中の粒界破壊メカニズム

    小川祐平, Domas BIRENIS, 松永久生, 髙桑脩, 山辺純一郎

    日本鉄鋼協会第176回秋季講演大会  2018.9 

     More details

    Event date: 2019.6

    Language:Japanese   Presentation type:Oral presentation (general)  

    Venue:東北大学   Country:Japan  

  • オーステナイト系ステンレス鋼突合せ溶接継手の疲労強度特性に及ぼす内部水素の影響

    岡﨑三郎, 中村眞実, 松永久生, 髙桑脩, 松岡三郎

    溶接学会平成30年度秋季全国大会  2018.9 

     More details

    Event date: 2019.6

    Language:Japanese   Presentation type:Oral presentation (general)  

    Venue:愛媛大学   Country:Japan  

  • 高圧水素ガス中におけるオーステナイト系ステンレス鋼溶接金属317LのSSRT特性

    中村眞実, 岡﨑三郎, 松永久生, 髙桑脩, 松岡三郎

    溶接学会平成30年度秋季全国大会  2018.9 

     More details

    Event date: 2019.6

    Language:Japanese   Presentation type:Oral presentation (general)  

    Venue:愛媛大学   Country:Japan  

  • 水素ガス環境中における純鉄の疲労き裂進展特性とその微視的メカニズム

    小川祐平, Domas BIRENIS, 松永久生, 髙桑脩, 山辺純一郎

    溶接学会平成30年度秋季全国大会  2018.9 

     More details

    Event date: 2019.6

    Language:Japanese   Presentation type:Oral presentation (general)  

    Venue:愛媛大学   Country:Japan  

  • 高圧水素ガス中における材料強度試験

    松永久生, 髙桑脩, 山辺純一郎, 松岡三郎

    溶接学会平成30年度秋季全国大会  2018.9 

     More details

    Event date: 2019.6

    Language:Japanese   Presentation type:Oral presentation (general)  

    Venue:愛媛大学   Country:Japan  

  • 九州大学・水素材料先端科学研究センター金属材料研究部門の取組み

    松永久生,髙桑脩,佐藤慎巳,岡崎三郎,中村眞実

    溶接学会第244回溶接法研究委員会  2018.11 

     More details

    Event date: 2019.6

    Language:Japanese   Presentation type:Oral presentation (general)  

    Venue:九州大学   Country:Japan  

  • BCC鉄中の水素誘起疲労き裂進展の微視的機構とき裂進展加速挙動に及ぼす固溶炭素の影響

    小川祐平, 木村由比子, 松永久生, 髙桑脩, 山辺純一郎

    日本鉄鋼協会第177回春季講演大会  2019.3 

     More details

    Event date: 2019.6

    Language:Japanese   Presentation type:Oral presentation (general)  

    Venue:東京電機大学   Country:Japan  

  • 析出強化型Fe基超合金A286の引張変形および破壊挙動に及ぼす固溶水素の効果

    細井日向,髙桑脩, 小川祐平, 松永久生

    日本鉄鋼協会第177回春季講演大会  2019.3 

     More details

    Event date: 2019.6

    Language:Japanese   Presentation type:Oral presentation (general)  

    Venue:東京電機大学   Country:Japan  

  • 水素環境によるオーステナイト系ステンレス鋼の疲労き裂進展加速と延性低下

    髙桑脩, 小川祐平, 松永久生

    日本鉄鋼協会2019年度「水素脆化の基本要因と実用課題」フォーラム  2019.4 

     More details

    Event date: 2019.6

    Language:Japanese   Presentation type:Oral presentation (general)  

    Country:Japan  

  • 異種材料レーザ溶接部の疲労き裂進展下限界特性に及ぼす水素ガス環境の影響 Invited

    髙桑脩, 橋口雄大, 松永久生, 西村貴郎, 國立悦生, 宮本宜幸

    溶接学会2019年度溶接疲労強度研究委員会  2019.4 

     More details

    Event date: 2019.6

    Language:Japanese   Presentation type:Oral presentation (general)  

    Venue:大阪大学   Country:Japan  

  • Recent Activities for Hydrogen Compatibility of Materials Used in Hydrogen Stations in Japan Invited International conference

    Hisao MATSUNAGA, Osamu TAKAKUWA, Junichiro YAMABE

    International Workshop on Standards and Codes for Hydrogen Infrastructure Safety  2018.11 

     More details

    Event date: 2018.11

    Language:English   Presentation type:Oral presentation (general)  

    Country:Korea, Republic of  

  • Assessment of the contribution of internal pressure to the structural damage in a hydrogen-charged Type 316L austenitic stainless steel during slow strain rate tensile test

    Jean Gabriel Sezgin, Osamu Takakuwa, Hisao Matsunaga, Junichiro Yamabe

    22nd European Conference on Fracture, ECF 2018  2018.1 

     More details

    Event date: 2018.8

    Language:English  

    Country:Serbia  

  • Hydrogen-assisted fatigue crack propagation in a commercially pure BCC iron

    ASME 2018 Pressure Vessels and Piping Conference, PVP 2018  2018.1 

     More details

    Event date: 2018.7

    Language:English  

    Country:Czech Republic  

  • Temperature dependence of fatigue crack growth in low-alloy steel under gaseous hydrogen

    Osamu Takakuwa, Michio Yoshikawa, Saburo Matsuoka, Junichiro Yamabe, Saburo Okazaki, Hisao Matsunaga

    ASME 2018 Pressure Vessels and Piping Conference, PVP 2018  2018.1 

     More details

    Event date: 2018.7

    Language:English  

    Country:Czech Republic  

  • Hydrogen-assisted fatigue crack propagation in a pure BCC iron. Part II Accelerated regime manifested by quasi-cleavage fracture at relatively high stress intensity range values

    12th International Fatigue Congress, FATIGUE 2018  2018.5 

     More details

    Event date: 2018.5 - 2018.6

    Language:English  

    Country:France  

  • Hydrogen-assisted fatigue crack propagation in a pure BCC iron. Part I Intergranular crack propagation at relatively low stress intensities

    12th International Fatigue Congress, FATIGUE 2018  2018.5 

     More details

    Event date: 2018.5 - 2018.6

    Language:English  

    Country:France  

  • Hydrogen-Assisted Fracture in Pre-Charged Precipitation-Hardened Iron-Based Superalloy A286 International conference

    Osamu TAKAKUWA, Yuhei OGAWA, Junichiro YAMABE, Hisao MATSUNAGA

    Korea-China-Japan Joint Workshop on Hydrogen Materials 2018  2018.4 

     More details

    Event date: 2018.4

    Language:English   Presentation type:Oral presentation (general)  

    Country:Korea, Republic of  

  • Hydrogen-assisted degradation of high-strength stainless steel with a newly developed aluminum-based coating in high-pressure hydrogen gas environment

    Junichiro Yamabe, Osamu Takakuwa, Tohru Awane, Saburo Matsuoka

    ASME 2017 Pressure Vessels and Piping Conference, PVP 2017  2017.1 

     More details

    Event date: 2017.7

    Language:English  

    Country:United States  

  • Recent progress on interpretation of tensile ductility loss for various austenitic stainless steels with external and internal hydrogen

    Osamu Takakuwa, Junichiro Yamabe, Hisao Matsunaga, Yoshiyuki Furuya, Saburo Matsuoka

    ASME 2017 Pressure Vessels and Piping Conference, PVP 2017  2017.1 

     More details

    Event date: 2017.7

    Language:English  

    Country:United States  

  • Effect of indentation load on vickers hardness of austenitic stainless steel after hydrogen charging

    Osamu Takakuwa, Yuta Mano, Hitoshi Soyama

    ASME 2014 Pressure Vessels and Piping Conference, PVP 2014  2014.1 

     More details

    Event date: 2014.7

    Language:English  

    Country:United States  

  • Effect of hydrogen on the micro- and macro-strain near the surface of austenitic stainless steel

    Osamu Takakuwa, Yuta Mano, Hitoshi Soyama

    2014 International Conference on Materials Science and Engineering Technology, MSET 2014  2014.1 

     More details

    Event date: 2014.6

    Language:English  

    Country:China  

  • Effect of nozzle shape for high injection pressure on aggressivity of cavitating jet

    H. Soyama, Osamu Takakuwa, A. Naito

    21st International Conference on Water Jetting: Looking to the Future, Learning from the Past  2012.12 

     More details

    Event date: 2012.9

    Language:English  

    Country:Canada  

  • Suppression of fatigue crack growth in austenite stainless steel by cavitation peening

    Osamu Takakuwa, Masaaki Nishikawa, Hitoshi Soyama

    9th International Conference on Fracture and Damage Mechanics, FDM 2010  2011.1 

     More details

    Event date: 2009.9

    Language:English  

    Country:Japan  

  • Release of micro strain in tool alloy steel by a cavitating jet in air

    H. Soyama, N. Yamada, Osamu Takakuwa, Y. Sekine, M. Mikami

    19th International Conference on Water Jetting  2008.12 

     More details

    Event date: 2008.10

    Language:English  

    Country:United Kingdom  

▼display all

MISC

  • キャビテーションピーニングによる圧縮応力付与

    高桑脩, 西川雅章, 祖山均

    砥粒加工学会誌   2010.5

     More details

    Language:Japanese   Publishing type:Article, review, commentary, editorial, etc. (scientific journal)  

Industrial property rights

Patent   Number of applications: 5   Number of registrations: 4
Utility model   Number of applications: 0   Number of registrations: 0
Design   Number of applications: 0   Number of registrations: 0
Trademark   Number of applications: 0   Number of registrations: 0

Professional Memberships

  • The Japan Society of Mechanical Engineers

  • The Iron and Steel Institute of Japan

  • The Society of Materials Science, Japan

Committee Memberships

  • Steering committee member   Domestic

    2020.4 - 2021.3   

  • 日本機械学会   広報委員長   Domestic

    2020.4 - 2021.3   

  • Steering committee member   Domestic

    2019.4 - 2021.3   

  • 日本機械学会   広報副委員長   Domestic

    2019.4 - 2021.3   

Academic Activities

  • 実行委員

    日本機械学会M&M CMD若手シンポジウム2023  ( KKR金沢 ) 2023.8

     More details

    Type:Competition, symposium, etc. 

  • Screening of academic papers

    Role(s): Peer review

    2023

     More details

    Type:Peer review 

    Number of peer-reviewed articles in foreign language journals:11

    Number of peer-reviewed articles in Japanese journals:2

    Proceedings of International Conference Number of peer-reviewed papers:0

    Proceedings of domestic conference Number of peer-reviewed papers:0

  • Screening of academic papers

    Role(s): Peer review

    2022

     More details

    Type:Peer review 

    Number of peer-reviewed articles in foreign language journals:13

    Number of peer-reviewed articles in Japanese journals:1

    Proceedings of International Conference Number of peer-reviewed papers:1

  • Screening of academic papers

    Role(s): Peer review

    2021

     More details

    Type:Peer review 

    Number of peer-reviewed articles in foreign language journals:11

    Number of peer-reviewed articles in Japanese journals:1

  • Screening of academic papers

    Role(s): Peer review

    2020

     More details

    Type:Peer review 

    Number of peer-reviewed articles in foreign language journals:12

  • 不明

    日本機械学会M&M2019材料力学カンファレンス  ( 九州大学 ) 2019.11

     More details

    Type:Competition, symposium, etc. 

  • 座長

    日本鉄鋼協会第177回春季講演大会  ( 東京電機大学 ) 2019.3

     More details

    Type:Competition, symposium, etc. 

  • Screening of academic papers

    Role(s): Peer review

    2019

     More details

    Type:Peer review 

    Number of peer-reviewed articles in foreign language journals:15

    Proceedings of International Conference Number of peer-reviewed papers:4

  • 座長

    日本鉄鋼協会第176回秋季講演大会  ( 東北大学 ) 2018.9

     More details

    Type:Competition, symposium, etc. 

  • 座長

    日本機械学会九州支部第71期総会・講演会  ( 九州大学 ) 2018.3

     More details

    Type:Competition, symposium, etc. 

  • 座長

    日本鉄鋼協会第175回春季講演大会  ( 千葉工業大学 ) 2018.3

     More details

    Type:Competition, symposium, etc. 

  • Screening of academic papers

    Role(s): Peer review

    2018

     More details

    Type:Peer review 

    Number of peer-reviewed articles in foreign language journals:11

    Number of peer-reviewed articles in Japanese journals:0

    Proceedings of International Conference Number of peer-reviewed papers:4

    Proceedings of domestic conference Number of peer-reviewed papers:0

  • Screening of academic papers

    Role(s): Peer review

    2017

     More details

    Type:Peer review 

    Number of peer-reviewed articles in foreign language journals:6

    Number of peer-reviewed articles in Japanese journals:0

    Proceedings of International Conference Number of peer-reviewed papers:4

    Proceedings of domestic conference Number of peer-reviewed papers:0

▼display all

Research Projects

  • ベリリウム銅合金の各種強度特性評価

    2024.4 - 2025.3

    共同研究

      More details

    Authorship:Principal investigator  Grant type:Other funds from industry-academia collaboration

  • 高圧水素機器の強度設計に関する研究

    2023.4 - 2026.3

    共同研究

      More details

    Authorship:Principal investigator  Grant type:Other funds from industry-academia collaboration

  • 科学研究費補助金 基盤研究(B)「相変態×水素誘起き裂発生・進展現象解明:高分解能X線CTと局所XRDの援用」

    2023.4 - 2025.3

    日本学術振興会 

      More details

    Authorship:Principal investigator 

    最も汎用的なFe-18Cr-8Niは、オーステナイト相の安定度が低く、変形中に水素脆化敏感性の高いマルテンサイト相に相変態するために、水素により強度・延性・靭性などの重要な機械的特性が低下する。今後、水素社会が自立して発展するためには、その機械的特性低下の本質を見極めて“水素の影響を受ける材料”についての安全・安心な設計指針を構築し、積極的に使用することが不可欠である。本研究では、重要課題となるFe-Cr-Ni合金の相変態×水素に焦点を当て、変形中における関心領域に随時ズームインして、相変態挙動および結晶学的情報を解析し、相変態起因の水素誘起き裂の発生・進展プロセスの解明に挑戦する。

  • ベリリウム銅合金の各種強度特性評価

    2023.4 - 2024.3

    共同研究

      More details

    Authorship:Principal investigator  Grant type:Other funds from industry-academia collaboration

  • 相変態×水素誘起き裂発生・進展現象解明:高分解能X線CTと局所XRDの援用

    Grant number:23H01304  2023 - 2025

    日本学術振興会  科学研究費助成事業  基盤研究(B)

      More details

    Authorship:Principal investigator  Grant type:Scientific research funding

  • 超高分解能X線顕微鏡で解くFe-Cr-Ni合金の相変態と水素脆化

    2023 - 2024

    吉田学術教育振興財団 2023年度学術奨励金

      More details

    Authorship:Principal investigator  Grant type:Contract research

  • 高分解能X線CTによる水素誘起ミクロ損傷発生挙動の3次元追跡および素過程解明

    2023

    池谷科学技術振興財団 2023年度研究助成

      More details

    Authorship:Principal investigator  Grant type:Contract research

  • 溶接部の新たな水素脆化試験法の開発

    2022.10 - 2023.9

    共同研究

      More details

    Authorship:Principal investigator  Grant type:Other funds from industry-academia collaboration

  • ベリリウム銅合金の各種強度特性評価

    2022.4 - 2023.3

    共同研究

      More details

    Authorship:Principal investigator  Grant type:Other funds from industry-academia collaboration

  • 高分解能X線CTとXRDを活用したFe-Cr-Ni合金の相変態誘起水素脆化メカニズム解明

    2022 - 2023

    日本鉄鋼協会 第1回鉄鋼カーボンニュートラル研究助成

      More details

    Authorship:Principal investigator  Grant type:Contract research

  • 溶接部の新たな水素脆化試験法の開発

    2021.10 - 2022.9

    共同研究

      More details

    Authorship:Principal investigator  Grant type:Other funds from industry-academia collaboration

  • 高圧水素機器の強度設計に関する研究

    2021.4 - 2023.3

    共同研究

      More details

    Authorship:Principal investigator  Grant type:Other funds from industry-academia collaboration

  • ベリリウム銅合金の各種強度特性評価

    2021.4 - 2022.3

    共同研究

      More details

    Authorship:Principal investigator  Grant type:Other funds from industry-academia collaboration

  • 科学研究費補助金 基盤研究(C)「熱活性過程で理解する水素環境下疲労き裂進展加速メカニズム」

    2020.4 - 2023.3

    日本学術振興会 

      More details

    Authorship:Principal investigator 

    国策でもある水素社会の実現のためには“水素の影響がない材料”だけでなく“水素の影響がある材料”(例えば炭素鋼などの安価な鉄鋼材料)の水素脆化の本質を見極めて設計指針を構築し、積極的に使用することが求められる。変幻自在な水素脆化を考える際に重要となるのは、き裂周りの「転位と水素の相互作用」であり、この相互作用がき裂の「力学状態」と「水素環境」に大きく依存すると考えられる。本研究では転位-水素間相互作用を“熱活性過程(時間と温度に依存する現象)”として捉え、鉄鋼材料の水素助長疲労き裂進展の素過程を包括的に明らかにし、破壊モデルを確立して、水素環境における鉄鋼材料の適用指針構築への橋渡しを目指す。

  • 熱活性過程で理解する水素環境下疲労き裂進展加速メカニズム

    Grant number:20K04161  2020 - 2022

    日本学術振興会  科学研究費助成事業  基盤研究(C)

      More details

    Authorship:Principal investigator  Grant type:Scientific research funding

  • 溶接部の新たな水素脆化試験法の開発

    2018.10 - 2021.9

    共同研究

      More details

    Authorship:Principal investigator  Grant type:Other funds from industry-academia collaboration

  • 高圧水素機器の強度設計に関する研究

    2018.8 - 2021.3

    共同研究

      More details

    Authorship:Principal investigator  Grant type:Other funds from industry-academia collaboration

  • H3ロケットの強度設計

    2018.6 - 2020.3

    受託研究

      More details

    Authorship:Coinvestigator(s)  Grant type:Other funds from industry-academia collaboration

  • 接合部への水素の影響に関する共同研究

    2018.5 - 2019.3

    共同研究

      More details

    Authorship:Principal investigator  Grant type:Other funds from industry-academia collaboration

  • 省エネルギー戦略に寄与するヘテロナノ超高強度銅合金の開発

    2018 - 2020

    戦略的省エネルギー技術革新プログラム

      More details

    Authorship:Coinvestigator(s)  Grant type:Contract research

  • ニッケル基超合金の水素誘起割れ発生・成長メカニズム

    2018 - 2019

    JFE21世紀財団 技術研究助成

      More details

    Authorship:Principal investigator  Grant type:Contract research

  • 高温・高圧水素ガス環境下におけるNi基超合金の破壊決定メカニズム

    2018 - 2019

    鉄鋼研究振興助成

      More details

    Authorship:Principal investigator  Grant type:Contract research

  • 接合部への水素の影響に関する共同研究

    2017.8 - 2018.2

    共同研究

      More details

    Authorship:Principal investigator  Grant type:Other funds from industry-academia collaboration

  • 耐水素溶射皮膜の開発と高圧水素ガス中における効果の実証

    2017 - 2018

    福岡水素エネルギー戦略会議

      More details

    Authorship:Principal investigator  Grant type:Contract research

  • 新エネルギー・産業技術開発機構NEDO 戦略的省エネルギー技術革新プログラム「省エネルギーに寄与するヘテロナノ超高強度銅合金材の開発」

    2016.10 - 2018.2

    新エネルギー・産業技術開発機構 

      More details

    Authorship:Coinvestigator(s) 

  • 新エネルギー・産業技術開発機構NEDO 水素利用技術研究開発事業「FCV及び水素ステーション関連機器向け使用可能鋼材の拡大及び複合容器の基準整備等に関する研究開発」

    2016.10 - 2018.2

    新エネルギー・産業技術開発機構 

      More details

    Authorship:Coinvestigator(s) 

  • 歪評価に立脚した局所的な水素凝集マッピング法の構築

    2015 - 2016

    科学研究費助成事業  若手研究(B)

      More details

    Authorship:Principal investigator  Grant type:Scientific research funding

  • インデンテーション法による水素侵入層の局所的かつ定量的評価手法の構築

    2013 - 2014

    科学研究費助成事業  若手研究(B)

      More details

    Authorship:Principal investigator  Grant type:Scientific research funding

  • 圧子押込み試験による耐水素脆化層評価法の構築

    2012 - 2013

    日本学術振興会  科学研究費助成事業  研究活動スタート支援

      More details

    Authorship:Principal investigator  Grant type:Scientific research funding

  • 歪評価に立脚した次世代水素貯蔵システム用表面改質法の構築

    2010 - 2012

    日本学術振興会  科学研究費助成事業  特別研究員奨励費

      More details

    Authorship:Principal investigator  Grant type:Scientific research funding

▼display all

Class subject

  • 材料強度学 Ⅱ

    2023.6 - 2023.8   Summer quarter

  • 弾性力学B(A)

    2023.6 - 2023.8   Summer quarter

  • 弾性力学B(A)

    2023.6 - 2023.8   Summer quarter

  • 弾性力学A(A)

    2023.4 - 2023.6   Spring quarter

  • 弾性力学A(A)

    2023.4 - 2023.6   Spring quarter

  • (IUPE)Mechanical and Aerospace Engineering Experiments I

    2023.4 - 2023.6   Spring quarter

  • 材料力学Ⅳ(S2-20後半、S2-21)

    2022.12 - 2023.2   Winter quarter

  • 材料力学Ⅳ(機械・航空)

    2022.12 - 2023.2   Winter quarter

  • 弾性力学A

    2022.10 - 2022.12   Fall quarter

  • 材料強度学 Ⅱ

    2022.6 - 2022.8   Summer quarter

  • 機械材料

    2022.4 - 2023.3   Full year

  • 機械工学実験第一(A-Ⅰ)

    2022.4 - 2022.9   First semester

  • 機械工学実験第一(B-Ⅱ)

    2022.4 - 2022.9   First semester

  • 機械工学実験第一(A-Ⅱ,B-Ⅰ)

    2022.4 - 2022.9   First semester

  • (IUPE)Mechanical and Aerospace Engineering Experiments I

    2022.4 - 2022.6   Spring quarter

  • 弾性力学B(A)

    2022.4 - 2022.6   Spring quarter

  • 機械材料Ⅱ

    2022.4 - 2022.6   Spring quarter

  • 弾性力学A(Aクラス)

    2021.12 - 2022.2   Winter quarter

  • 材料力学Ⅳ(理27後半、理28)

    2021.10 - 2021.12   Fall quarter

  • 材料強度学 Ⅱ

    2021.6 - 2021.8   Summer quarter

  • 機械工学実験第一(A-Ⅰ)

    2021.4 - 2021.9   First semester

  • 機械工学実験第一(B-Ⅱ)

    2021.4 - 2021.9   First semester

  • 機械工学実験第一(A-Ⅱ,B-Ⅰ)

    2021.4 - 2021.9   First semester

  • 機械材料

    2021.4 - 2021.6   Spring quarter

  • (IUPE)Mechanical and Aerospace Engineering Experiments I

    2021.4 - 2021.6   Spring quarter

  • 弾性力学B(A)

    2021.4 - 2021.6   Spring quarter

  • 弾性力学第二・同演習(A)

    2021.4 - 2021.6   Spring quarter

  • 機械材料Ⅱ

    2021.4 - 2021.6   Spring quarter

  • 弾性力学第一・同演習(Aクラス

    2020.12 - 2021.2   Winter quarter

  • 弾性力学A(Aクラス)

    2020.12 - 2021.2   Winter quarter

  • 材料力学Ⅳ(理27後半、理28)

    2020.10 - 2020.12   Fall quarter

  • 機械材料

    2020.4 - 2021.3   Full year

  • 材料強度学

    2020.4 - 2020.9   First semester

  • 弾性力学第二・同演習(Aクラス)

    2020.4 - 2020.9   First semester

  • 弾性力学B(Aクラス)

    2020.4 - 2020.6   Spring quarter

  • 機械材料 II

    2020.4 - 2020.6   Spring quarter

  • 弾性力学A(Aクラス)

    2019.12 - 2020.2   Winter quarter

  • 材料力学Ⅳ(理27後半・理28)

    2019.10 - 2019.12   Fall quarter

  • 材料強度学

    2019.4 - 2019.9   First semester

  • 弾性力学B

    2019.4 - 2019.6   Spring quarter

  • 弾性力学A

    2018.12 - 2019.2   Winter quarter

  • 機械工学実験第一

    2018.4 - 2018.9   First semester

  • 材料強度学

    2018.4 - 2018.9   First semester

  • 弾性力学第二・同演習

    2018.4 - 2018.9   First semester

▼display all

FD Participation

  • 2023.1   Role:Participation   Title:2022年度第2回機械系FD

    Organizer:Undergraduate school department

  • 2022.11   Role:Participation   Title:2022年度第1回機械系FD

    Organizer:Undergraduate school department

  • 2021.8   Role:Participation   Title:2021年度第1回機械系FD

    Organizer:Undergraduate school department

  • 2021.3   Role:Participation   Title:2020年度第3回機械系FD

    Organizer:Undergraduate school department

  • 2020.11   Role:Participation   Title:2020年度第2回機械系FD

    Organizer:Undergraduate school department

  • 2020.6   Role:Participation   Title:2020年度第1回機械系FD

    Organizer:Undergraduate school department

  • 2019.12   Role:Participation   Title:2019年度第2回機械系FD

    Organizer:Undergraduate school department

  • 2019.6   Role:Participation   Title:2019年度第1回機械系FD

    Organizer:Undergraduate school department

  • 2018.12   Role:Planning   Title:2018年度第2回機械系FD

    Organizer:Undergraduate school department

  • 2018.6   Role:Planning   Title:2018年度第1回機械系FD

    Organizer:Undergraduate school department

▼display all

Other educational activity and Special note

  • 2023  Class Teacher 

  • 2023  Class Teacher 

  • 2023  Coaching of Students' Association 

  • 2022  Class Teacher 

  • 2022  Coaching of Students' Association 

  • 2018  Class Teacher 

▼display all

Social Activities

  • 安全・安心な暮らしを支える構造材料とその使い方 ―材料力学(Mechanics of Material)への入門編-

    呉市立三津田高等学校  2023.6

     More details

    Audience: Infants, Schoolchildren, Junior students, High school students

    Type:Seminar, workshop

  • 暮らしを支える構造材料

    九州大学大学院工学研究院機械工学部門  2023.1

     More details

    Audience: General, Scientific, Company, Civic organization, Governmental agency

    Type:Lecture

  • ものづくりと材料力学

    西宮市立西宮高等学校  2019.9

     More details

    Audience: Infants, Schoolchildren, Junior students, High school students

    Type:Seminar, workshop

Travel Abroad

  • 2012.5 - 2012.8

    Staying countory name 1:United States   Staying institution name 1:University of Cincinnati