| 1. |
K. Matsuda, T. Masumura, T. Tsuchiyama, Y. Onuki, M. Takanashi, T. Maeda, Y. Kawamoto, H. Shirahata, R. Uemori, Reverse Transformation Behavior in Multi-phased Medium Mn Martensitic Steel Analyzed by in-situ Neutron Diffraction, ISIJ International, https://doi.org/10.2355/isijinternational.ISIJINT-2023-053, 64, 2, 486-490, 2024.02. |
| 2. |
S. Uranaka, M. Takanashi, T. Maeda, T. Masumura, T. Tsuchiyama, Y. Kawamoto, H. Shirahata, Y. Kobayashi, Effects of Retained Austenite upon Softening during Low-temperature Tempering in Martensitic Carbon Steels, ISIJ International, https://doi.org/10.2355/isijinternational.ISIJINT-2023-100, 64, 2, 449-458, 2024.02. |
| 3. |
S. Uranaka, I. Hirashima, T. Maeda, T. Masumura, T. Tsuchiyama, Y. Kawamoto, H. Shirahata, R. Uemori, Quantitative Analysis of Hardening Due to Carbon in Solid Solution in Martensitic Steels, ISIJ International, https://doi.org/10.2355/isijinternational.ISIJINT-2022-416, 63, 3, 569-578, 2023.03. |
| 4. |
Y. Takenouchi, S. Wada, T. Masumura, T. Tsuchiyama, H. Okano, S. Takagi, Relation between Low Elastic Limit and Mobile Dislocation , ISIJ International, https://doi.org/10.2355/isijinternational.ISIJINT-2022-196, 62, 10, 2000-2007, 2022.10. |
| 5. |
S. Uranaka, C. Nishimura, I. Hirashima, T. Maeda, T. Masumura, T. Tsuchiyama, Y. Kawamoto, H. Shirahata, R. Uemori, Dependance of solute carbon concentration on electrical resistivity of retained austenite, Scripta Materialia, https://doi.org/10.1016/j.scriptamat.2022.114791, 218, 114791, 2022.09. |
| 6. |
T. Tsuchiyama, K. Tsugumi, T. Ma, T. Masumura, Y. Ono, Nitrogen-Enhanced Temperature Dependence of Grain Refinement Strengthening in Austenitic Stainless Steel, steel research international, https://doi.org/10.1002/srin.202200428, 2200428, 2022.07. |
| 7. |
T. Masumura, K. Inami, K. Matsuda, T. Tsuchiyama, S. Nanba, A. Kitahara, Quantitative evaluation of dislocation density in as-quenched martensite with teteragonality by X-ray line profile analysis in a medium-carbon steel, Acta Materialia, https://doi.org/10.1016/j.actamat.2022.118052, 218, 118052, 2022.05. |
| 8. |
T. Masumura, T. Honda, K. Naridomi, S. Uranaka, T. Tsuchiyama, G. Miyamoto, S. Yamasaki, Age-Hardening Behavior in High-Nitrogen Stable Austenitic Stainless Steel, Materials Transactions, https://doi.org/10.2320/matertrans.MT-H2021001, 63, 2, 163-169, 2022.02. |
| 9. |
M. Kubota, D. Takazaki, R. Komoda, K. Wada, T. Tsuchiyama, M. Dadfarnia, B.P.Somerday, P. Sofronis, Effect of Hydrogen on Creep Properties, Minerals, Metals and Materials Series（TMS2022), 1541-1548, 2022.01. |
| 10. |
Y. Oba, S. Morooka, K. Ohishi, J. Suzuki, T. Tsuchiyama, Characterization of Deformation by Cold Rolling in Ferritic Steel Containing Cu Particles Using Neutron Transmission Analysis, ISIJ International, https://doi.org/10.2355/isijinternational.ISIJINT-2021-144, 62, 1, 173-178, 2022.01. |
| 11. |
Y. Zhou, T. Masumura, T. Tsuchiyama, Verification of Thermodynamic Models for Predicting Grain Boundary Segregation of Carbon and Nitrogen in Ferritic Steels, ISIJ International, https://doi.org/10.2355/isijinternational.ISIJINT-2021-386, 62, 1, 278-280, 2022.01. |
| 12. |
T.Maeda, S.Okuhata, K.Matsuda, T.Masumura, T.Tsuchiyama, H.Shirahata, Y.Kawamoto, M.Fujioka, R.Uemori, Toughening mechanism in 5%Mn and 10%Mn martensitic steels treated by thermo-mechanical control process, Materials Science & Engineering A, https://doi.org/10.1016/j.msea.2021.141058, 812, 141058, 2021.04. |
| 13. |
L. Meng, T. Kitashima, T. Tsuchiyama, M. Watanabe, β-Texture evolution of a Near-β Titanium Alloy During Cooling After Forging in the β Single-Phase and (α + β) Dual-Phase Regions, Metallurgical and Materials Transactions A, 52, 303-315, 2021.01. |
| 14. |
T. Masumura, T. Taniguchi, S. Uranaka, I. Hirashima, T. Tsuchiyama, N. Maruyama, H. Shirahata, R.Uemori, Estimation of Solute Carbon Concentration by Electrical Resistivity Measurement in Martensitic Steel, ISIJ International, https://doi.org/10.2355/isijinternational.ISIJINT-2020-669, 61, 5, 1708-1715, 2021.05. |
| 15. |
K.Kaneko, T.Maeda, Y.Kawahara, K.Ichino, T.Masumura, T.Tsuchiyama, H.Shirahata, R.Uemori, Formation of core-shell type structure in Duplex Martensitic Steel, Scripta Materialia, https://doi.org/10.1016/j.scriptamat.2020.10.044, 193, 112-116, 2021.03. |
| 16. |
T. Masumura, T. Tsuchiyama, Effect of Carbon and Nitrogen on Work-hardening Behavior in Metastable Austenitic Stainless Steel, ISIJ International, https://doi.org/10.2355/isijinternational.ISIJINT-2020-535, 61, 2, 617-624, 2021.02. |
| 17. |
T. Masumura, K. Fujino, T. Tsuchiyama, S. Takaki, K. Kimura, Effect of Carbon and Nitrogen on Md30 in Metastable Austenitic Stainless Steel, ISIJ International, https://doi.org/10.2355/isijinternational.ISIJINT-2020-719, 61, 2, 546-555, 2021.02. |
| 18. |
T. Tsuchiyama. Y. Amano, S. Uranaka, T. Masumura, Effect of Initial Austenite Grain Size on Microstructure Development and Mechanical Properties in a Medium-carbon Steel Treated with One-step Quenching and Partitioning, ISIJ International, https://doi.org/10.2355/isijinternational.ISIJINT-2020-543, 61, 2, 537-545, 2021.02. |
| 19. |
T. Tsuchiyama, T. Sakamoto, S. Tanaka, T. Masumura, Control of Core-shell Type Second Phase Formed via Interrupted Quenching and Intercritical Annealing in a Medium Manganese Steel
, ISIJ International, https://doi.org/10.2355/isijinternational.ISIJINT-2020-164, 60, 12, 2954-2962, 2020.12, Medium manganese steel (Fe-5.0%Mn-1.2%Si-0.10%C alloy) was subjected to interrupted quenching from the austenite single-phase region to a temperature between Ms and Mf followed by intercritical annealing in the ferrite and austenite dual-phase region at 923 K. As a result, a core-shell type second phase, which consisted of a fresh martensite core surrounded by a film-like retained austenite shell, was formed. The mechanism and kinetics of reversion for the interrupted-quenched specimens were analyzed with DICTRA simulation and TEM observation. With regard to the effect of the core-shell type second phase on mechanical properties, it was inferred that the fresh martensite core functioned as a hard second phase and enhanced work hardening by stress partitioning similar to DP steel, while the film-like retained austenite contributed to improved ductility due to the TRIP effect. As the interrupted quenching temperature decreased, the volume fraction of the fresh martensite core decreased, while the stability of the retained austenite shell increased. This showed potential for controlling the strength and ductility balance of medium manganese steel. A possible beneficial effect of the core-shell type second phase on the ductile fracture behavior was also discussed in terms of stress/strain relaxation at the interfaces between hard martensite and ferrite matrix.. |
| 20. |
L. Meng, T. Kitashima, T. Tsuchiyama, M. Wstanabe, β-Texture Evolution During α Precipitation in the Two-Step Forging Process of a Near-βTitanium Alloy, Metallurgical and Materials Transactions A, https://doi.org/10.1007/s11661-020-05981-0, 51A, 5912-5922, 2020.11. |
| 21. |
K. Hyodo, S. Munetoh, T. Tsuchiyama, Empirical interatomic potential for Fe-C system using original FinnisSinclair potential function, Computational Materials Science, https://doi.org/10.1016/j.commatsci.2020.109871, 184, 109871, 2020.06. |
| 22. |
Y. Tanaka, T. Masumura, T. Tsuchiyama, S. Takaki, Effect of dislocation distribution on the yield stress in ferritic steel under identical dislocation density conditions, Scripta Materialia, https://doi.org/10.1016/j.scriptamat.2019.10.018, 177, 176-180, 2020.03. |
| 23. |
Y. Tanaka, T. Masumura, T. Tsuchiyama, S. Takaki, Effect of dislocation distribution on the yield stress in ferritic steel under identical dislocation density conditions, Scripta Materialia, https://doi.org/10.1016/j.scriptamat.2019.10.018, 177, 176-180, 2020.03. |
| 24. |
T. Masumura, Y. Seto, T. Tsuchiyama, K. Kimura, Work-Hardening Mechanism in High-Nitrogen Austenitic Stainless Steel, Materials Transactions, https://doi.org/10.2320/matertrans.H-M2020804, 61, 4, 678-684, 2020.03. |
| 25. |
K. Hyodo, S. Munetoh, T. Tsuchiyama, S. Takaki, Empirical interatomic potential for Fe-N binary system based onFinnis–Sinclair potential, Computational Materials Science, https://doi.org/10.1016/j.commatsci.2019.109500, 174, 109500, 2020.03, 後ほど入力. |
| 26. |
F. Jiang, S. Takaki, T. Masumura, R. Uemori, H. Zhang, T. Tsuchiyama, Nonadditive strengthening functions for cold-worked cubic metals: Experiments and constitutive modeling, International Journal of Plasticity, https://doi.org/10.1016/j.ijplas.2020.102700, 129, 102700, 2020.02. |
| 27. |
M. Koyama, K. Habib, T. Masumura, T. Tsuchiyama, H. Noguchi, Gaseous hydrogen embrittlement of a Ni-free austenitic stainless steel containing 1mass% nitrogen: Sffects of nitrogen-enhanced dislocation planarity, International Journal of Hydrogen Energy, https://doi.org/10.1016/j.ijhydene.2020.02.014, 45, 10209-10218, 2020.02. |
| 28. |
F. Jiang, T. Masumura, T. Tsuchiyama, S. Takaki, Effect of Substitutional Element Addition on Hall-Petch Relationship in Interstitial Free Ferritic Steels , ISIJ International, https://doi.org/10.2355/isijinternational.ISIJINT-2019-100, 59, 10, 1929-1931, 2019.10. |
| 29. |
S.Araki, K.Mashima, T.Masumura, T.Tsuchiyama, S.Takaki, T.Ohmura, Effect of grain boundary segregation of carbon on critical grain boundary strength of ferritic steel, Scripta Materialia, https://doi.org/10.1016/j.scriptamat.2019.05.001, 169, 38-41, 2019.05. |
| 30. |
S. Takaki, T. Masumura, T. Tsuchiyama, Dislocation Characterization by the Direct-fitting/modified Williamson–Hall (DF/mWH) Method in Cold Worked Ferritic Steel, ISIJ International, https://doi.org/10.2355/isijinternational.ISIJINT-2018-623, 59, 3, 567-572, 2019.03. |
| 31. |
F. Jiang, T. Masumura, K. Hirata, T. Tsuchiyama, S. Takaki, A new diffraction line profile breadth analysis approach for evaluating plastic lattice strain anisotropy in cold-worked nickel under various strain paths, International Journal of Plasticity, https://doi.org/10.1016/j.ijplas.2018.08.006, 112, 89-107, 2019.01. |
| 32. |
A.Macadre, T.Masumura, R.Manabe, T.Tsuchiyama, S.Takaki, Effect of nitrogen-addition on the absorption and diffusivity of hydrogen in a stable austenitic stainless steel, International Journal of Hydrogen Energy, https://doi.org/10.1016/j.ijhydene.2018.11.031, 44, 2, 1263-1271, 2019.01. |
| 33. |
T. Tsuchiyama, K. Inoue, K. Hyodo, D. Akama, N. Nakada, S. Takaki, T. Koyano, Comparison of Microstructure and Hardness between Highcarbon and High-nitrogen Martensites, ISIJ International, https://doi.org/10.2355/isijinternational.ISIJINT-2018-404, 59, 1, 161-168, 2019.01. |
| 34. |
K.Habib, M.Koyama, T.Tsuchiyama, H.Noguchi, ECCI Characterization of Dislocation Structures at a Non-propagating Fatigue Crack Tip: Toward Understanding the Effects of Mn-C and Cr-N Couples on Crack Growth Resistance, Metallurgical and Materials Transactions A, https://doi.org/10.1007/s11661-018-4972-x, 50, 1, 426-435, 2019.01. |
| 35. |
S. Araki, K. Fujii, D. Akama, T. Tsuchiyama, S. Takaki, T. Ohmura, J. Takahashi, Effect of Low Temperature Aging on Hall-Petch Coefficient in Ferritic Steels Containing a Small Amount of Carbon and Nitrogen, ISIJ International, https://doi.org/10.2355/isijinternational.ISIJINT-2018-130, 58, 10, 1920-1926, 2018.10. |
| 36. |
Y.Tanaka, S.Takaki, T.Tsuchiyama, R.Uemori, Effect of Grain Size on the Yield Stress of Cold Worked Iron, ISIJ International, https://doi.org/10.2355/isijinternational.ISIJINT-2018-371, 58, 10, 1927-1933, 2018.10. |
| 37. |
T. Masumura, T. Tsuchiyama, S. Takaki, T. Koyano, K. Adachi, Difference between carbon and nitrogen in thermal stability of metastable 18%Cr-8%Ni austenite, Scripta Materialia, https://doi.org/10.1016/j.scriptamat.2018.05.019, 154, 8-11, 2018.09. |
| 38. |
S. Hamada, J. Zhang, K. Zhang, M. Koyama, T. Tsuchiyama, T. Yokoi, H. Noguchi, Ductile-to-brittle transition in tensile failure due to shear-affected -zone with a stress-concentration source: A comparative study on punched-plate tensile-failure characteristics of precipitation-hardened and dual-phase steels, International Journal of Fracture, https://doi.org/10.1007/s10704-018-0304-9, 212, 237-248, 2018.08. |
| 39. |
S. Takaki, T. Masumura, F. Jiang, T. Tsuchiyama, Effect of Instrumental Correction on X-ray Line Profile Analysis in Cold Rolled Ferritic Steel, ISIJ International, https://doi.org/10.2355/isijinternational.ISIJINT-2018-021, 58, 6, 1181-1183, 2018.06. |
| 40. |
S. TAKAKI, F. JIANG, T. MASUMURA, T. TSUCHIYAMA, Correction of Elastic Anisotropy in Williamson-Hall Plots by Diffraction Young’s Modulus and Direct Fitting Method, ISIJ International, 58, 4, 769-775, 2018.04. |
| 41. |
T. Tsuchiyama, T. Taniguchi, D. Akama, S. Takaki, K. Kaneko, M. Yoshimura, M. Fujioka, R. Uemori, Estimation of Solute Carbon Concentration by Electrical Resistivity Method in Low-Carbon Martensitic Steel, ICOMAT2017, https://doi.org/10.1007/978-3-319-76968-4_39, 251-254, 2018.04. |
| 42. |
F. Jiang, K. Hirata, T. Masumura, T. Tsuchiyama, S. Takaki, Effect of the surface layer strained by mechanical grinding on x-ray diffraction analysis, ISIJ International, https://doi.org/10.2355/isijinternational.ISIJINT-2017-578, 58, 2, 376-378, 2018.02. |
| 43. |
S. Takaki, T. Masumura, T. Tsuchiyama, Proposal of Simplified Modified Williamson-Hall Equation, ISIJ International, https://doi.org/10.2355/isijinternational.ISIJINT-2018-517, 58, 12, 2354-2356, 2018.02. |
| 44. |
N. Nakada, T. Tsuchiyama, S. Takaki, Transformation mechanism of diffusional reversion from lath martensite to austenite, ISSS2017, 35-42, 2017.11. |
| 45. |
Kishan Habib, Motomichi Koyama, Toshihiro Tsuchiyama & Hiroshi Noguchi, Visualization of dislocations through electron channeling contrast imaging at fatigue crack tip, interacting with pre-existing dislocations, Materials Research Letters, 6, 1, 61-66, 2017.06. |
| 46. |
Michiharu Asano, Takuro Masumura, Toshihiro Tsuchiyama, Setsuo Takaki, Jun Takahashi, Kosaku Ushioda, Quantitative evaluation of Cu particle dissolution in cold-worked ferritic iron, Scripta Materialia, 140, 18-22, 2017.05. |
| 47. |
Nobuo Nakada, Shouhei Kawasaki, Yuuki Kogakura, Toshihiro Tsuchiyama, Setsuo Takaki, Matrix switch related to microstructural connectivity and its effect on strength in metals with duplex microstructure, Materials Science and Engineering A, 690, 270-276, 2017.01. |
| 48. |
Toshihiro Tsuchiyama, Taishi Inoue, Junya Tobata, Akama Daichi, Setsuo Takaki, Microstructure and mechanical properties of a medium manganese steel treated with interrupted quenching and intercritical annealing, Scripta Materialia, 122, 36-39, 2016.10. |
| 49. |
Yuki Tanaka, Nobuo Nakada, Toshihiro Tsuchiyama, Setsuo Takaki, Effect of pre-deformation temperature on yield strength of IF-steel, The 9th Pacific Rim International Conference on Advanced Materials and Processing , 598-601, 2016.08. |
| 50. |
MACADRE ARNAUD PAUL ALAIN, Toshihiro Tsuchiyama, Setsuo Takaki, Hydrogen-induced increase in phase stability in metastable austenite of various grain sizes under strain, Journal of Materials Science, 52, 3419-3428, 2016.05. |
| 51. |
Akama Daichi, Toshihiro Tsuchiyama, Setsuo Takaki, Change in Dislocation Characteristics with Cold Working in Ultralow-carbon Martensitic Steel, ISIJ International, 56, 1675-1680, 2016.05. |
| 52. |
Yojiro Oba, Satoshi Morooka, Kazuki Ohishi, Nobuhiro Sato, Rintaro Inoue, Nozomu Adachi, Jun-ichi Suzuki, Toshihiro Tsuchiyama, Elliot Paul Gilbert, Masaaki Sugiyama, Magnetic scattering in the simultaneous measurement of small-angle neutron scattering and Bragg edge transmission from steel, Journal of Applied Crystallography, 49, 1659-1664, 2016.05. |
| 53. |
Toshihiro Tsuchiyama, Shinji Yamamoto, Satoshi Hata, Mitsuhiro Murayama, Satoshi Morooka, Akama Daichi, Setsuo Takaki, Plastic deformation and dissolution of ε-Cu particles by cold rolling in an over-aged particle dispersion strengthening Fe-2mass%Cu alloy, Acta Materialia, 113, 48-55, 2016.03. |
| 54. |
Nobuo Nakada, Yuji Ishibashi, Toshihiro Tsuchiyama, Setsuo Takaki, Self-stabilization of untransformed austenite by hydrostatic pressure via martensitic transformation, Acta Materialia, 110, 95-102, 2016.01. |
| 55. |
Takuro Masumura, Kohei Fujino, Nobuo Nakada, Toshihiro Tsuchiyama, Setsuo Takaki, Kazuhiko Adachi, Effects of Carbon and Nitrogen Additions on Mechanical Stability of Metastable Austenitic Stainless Steel, Asia Steel 2015, 96-97, 2015.10. |
| 56. |
Toshihiro Tsuchiyama, Arnaud MACADRE, Setsuo Takaki, Nobuo Nakada, Critical grain size to limit the hydrogen-induced ductility drop in a metastable austenitic steel, International Journal of Hydrogen Energy, 40, 10697-10703, 2015.06. |
| 57. |
Takuro Masumura, Nobuo Nakada, Toshihiro Tsuchiyama, Setsuo Takaki, Difference in Martensitic Transformation Behavior between Carbon- and Nitrogen-added Metastable Austenitic Stainless Steels, PTM2015, 591-592, 2015.06. |
| 58. |
Toshihiro Tsuchiyama, Nasayuki Akita, Yoshihiko Uematsu, Toshihfumi Kakiuchi, Masaki Nakajima, Yu Bai, Kenta Isino, Effect of sensitization on corrosion fatigue behavior of type 304 stainless steel annealed in nitrogen gas, Materials Science and Engineering A, 640, 33-41, 2015.05. |
| 59. |
Nobuo Nakada, Norimitsu Koga, Yuki Tanaka, Toshihiro Tsuchiyama, Setsuo Takaki, Masaharu Ueda, Strengthening of Pearlitic Steel by Ferrite/Cementite Elastic Misfit Strain (Note), ISIJ International, 55, 2036-2038, 2015.05. |
| 60. |
Hata, Satoshi, Kazuhisa SATO, Mitsuhiro Murayama, Toshihiro Tsuchiyama, Hideharu Nakashima, An Experimental Protocol Development of Three-Dimensional Transmission Electron Microscopy Methods for Ferrous Alloys: Towards Quantitative Microstructural Characterization in Three Dimensions, ISIJ International, 55, 623-631, 2015.05. |
| 61. |
Takuro Masumura, Nakada Nobuo, Toshihiro Tsuchiyama, Setsuo Takaki, Tamotsu Koyano, Kazuhiko Adachi, The difference in thermal and mechanical stabilities of austenite between carbon- and nitrogen-added metastable austenitic stainless steels, ACTA MATERIALIA, 10.1016/j.actamat.2014.10.041, 84, 330-338, 2015.02, In order to evaluate the effects of carbon and nitrogen addition on the stability of austenite, athermal and deformation-induced
a0-martensitic transformation behaviors were investigated using type 304-metastable austenitic stainless steels containing 0.1 mass% carbon or
nitrogen. The difference in the development of the deformation microstructure in particular is discussed in terms of the stacking-fault energy
(SFE). Since carbon-added steel has a lower SFE than that of nitrogen-added steel, deformation twins and e-martensite were preferentially formed
in the carbon-added steel, whereas a dislocation cell structure developed in the nitrogen-added steel. Crystallographic analysis using the electron
backscatter diffraction method revealed that the difference in the deformation microstructure has a significant influence on the growth behavior
of deformation-induced a0-martensite, that is, the interface of the deformation twins and e-martensite suppresses the growth of a0-martensite, whereas
dislocation cell boundaries are not effective. As a result, the mechanical stability of carbon-added steel is slightly higher than that of nitrogen-added
steel, although the thermal stabilization effect of carbon is much lower than that of nitrogen.. |
| 62. |
Toshihiro Tsuchiyama, Duck-Soo Kang, Setsuo Takaki, Kwang-jin Lee, Eui-pyo Kwon, Variation of work hardening rate by oxygen contents in pure titanium alloy, Materials Science and Engineering A, 632, 120-126, 2015.02. |
| 63. |
Hirokazu Tsukahara, Takuro Masumura, Toshihiro Tsuchiyama, Setsuo Takaki, Koichi Nakashima, Kazukuni Hase, Shigeru Endo, Design of Alloy Composition in 5%Mn-Cr-C Austenitic Steels, ISIJ INTERNATIONAL, 55, 1, 312-318, 2015.01, The range of chemical compositions that can obtain an austenitic single structure was defined for
medium-manganese (Mn) carbon (C) steels. Among the potential compositions, Fe-5%Mn-4%Cr-(0.8–
1.4)%C (mass%) was selected as the optimized composition range to form a stable austenitic structure.
The tensile properties and deformation substructure were investigated in the austenitic steels having this
composition. The work hardening behavior of the steels varied depending on the carbon content, which
was closely related to the deformation microstructure. In the 0.8%C steel, both a deformation-induced
martensitic phase as well as the formation of deformation twins generated a high work hardening until
fracture. With an increasing carbon content, which increased the stacking fault energy (SFE), the deformation
tended to shift towards dislocation slipping, resulting in a lower work hardening rate. This trend
appears similar to conventional twinning-induced plasticity steel where the work hardening behavior is
tied to the SFE.. |
| 64. |
Nakada Nobuo, Koichi Tsuboi, Tatsuro Onomoto, Toshihiro Tsuchiyama, Setsuo Takaki, G. Inden, Thermodynamics and kinetics of solution nitriding, CALPHAD-COMPUTER COUPLING OF PHASE DIAGRAMS AND THERMOCHEMISTRY, 10.1016/j.calphad.2014.09.006, 47, 168-173, 2014.12, In ordertoclarifythethermodynamicsandkineticsofsolutionnitriding,thenon-uniformnitrogen
distribution formedbysolutionnitridingwasinvestigatedinaustenitic(18Cr–10Ni)andferritic(25Cr)
stainless steels,andthenitwassimulatedwith DICTRA. Themainissueforausteniticstainlesssteelisthe
surface reactiondeterminedbythemasstransferfromgastosolid,whilethatforferriticstainlesssteelis
the ferritetoaustenitetransformationandtheaustenitegrowthkineticsinducedbynitrogenabsorption.
DICTRA simulations gavecloseagreementwiththeexperimentalresultsanddemonstratedthatsolution
nitriding isobviouslycontrolledbymasstransferofnitrogenfromgastosolidaswellasdiffusioninthe
solid, andaustenitegrowthiscontrolledbynitrogendiffusioninaustenite.Inaddition,theanalysis
suggests thatnitrogenshouldhaveastrongerinteractionwithchromiumthanthattreatedinthe
thermodynamic databaseandaustenitenucleationinducedbynitrogenabsorptiontakesplacewithout
anychangeinCrcomposition.. |
| 65. |
Toshihiro Tsuchiyama, Koichi Tsuboi, Shuichi Iwanaga, Takuro Masumura, MACADRE ARNAUD PAUL ALAIN, Nakada Nobuo, Setsuo Takaki, Suppression of hydrogen embrittlement by formation of a stable austenite layer in metastable austenitic stainless steel, SCRIPTA MATERIALIA, 10.1016/j.scriptamat.2014.07.005, 90-91, 14-16, 2014.11, Solution nitriding was applied to a metastable austenitic stainless steel plate (Fe–18Cr–8Ni alloy) to stabilize the austenite near
the plate surface. After cold rolling, the interior austenite almost entirely transformed to martensite, but the stabilized surface austenite
remained unchanged. The interior deformation-induced martensite contributes to the material’s high strength and the surface
stable austenite-layer plays an important role in preventing hydrogen permeation. As a result, the resistance to hydrogen embrittlement
was significantly improved for the cold-rolled specimen.. |
| 66. |
Tomoya Fujisawa, shigeru hamada, Norimitsu Koga, Daisuke Sasaki, Toshihiro Tsuchiyama, Nakada Nobuo, Kazuki Takashima, Masaharu Ueda, Hiroshi Noguchi, Proposal for an engineering definition of a fatigue crack initiation unit for evaluating the fracture limit on the basis of crystallographic analysis of pearlitic steel, International Journal of Fracture, 10.1007/s10704-013-9895-3, 185, 17-29, 2014.10. |
| 67. |
Masaki Tanaka, Tatsuro Onomoto, Chihiro Furusho, Toshihiro Tsuchiyama, Kenji Higashida, Decrease in the Brittle-to-ductile Transition Temperature in Cu Added Nickel-free Austenitic Stainless Steels, ISIJ INTERNATIONAL, 10.2355/isijinternational.54.1735, 54, 7, 1735-1740, 2014.07, Brittle-to-ductile transition (BDT) in Cu added Ni-free austenitic stainless steel was investigated. Temperature
dependence of apparent fracture toughness was measured using four-point bending tests, indicating
that the BDT temperature was decreased with the increase in the Cu content. The activation energy
was obtained from the deformation rate dependence of BDT temperatures. It was found that the values
of the activation energy was decreased with the increase in the Cu content, suggesting that the dislocation
mobility in austenitic stainless steels was increased by Cu addition. The increase in the dislocation
mobility induces the decrease in the BDT temperature. The values of the activation energy are deviated
from the regression line drawn on the data which obtained from the materials with high Peierls potentials.
Temperature dependence of 0.2% proof stress indicated that the effective stress was nearly independent
from the Cu content while the values of activation volume were decreased with the increase in the Cu
content. A model for dislocation glide was proposed to explain the both decrease in the activation energy
and the activation volume with the increase in the Cu content.. |
| 68. |
Duck-soo Kang, Norimitsu Koga, Masayuki Sakata, Nakada Nobuo, Toshihiro Tsuchiyama, Setsuo Takaki, Enhanced work hardening by redistribution of oxygen in (α+β)-type Ti-4Cr-0.2O alloys, Materials Science and Engineering A, 606, c, 101-107, 2014.04. |
| 69. |
Kyosun Park, Masato Nishiyama, Nakada Nobuo, Toshihiro Tsuchiyama, Setsuo Takaki, Effect of the martensite distribution on the strain hardening and ductile fracture behaviors in dual-phase steel, Materials Science & Engineering A, 604, 135-141, 2014.03, In ordertoclarifytheeffectsofthemartensitedistributiononthemechanicalpropertiesoflow-carbon
dual-phase steel,fourtypesofdual-phasesteelwithdifferentferritegrainsizesandmartensite
distributions werepreparedusingathermomechanicaltreatment.Thetensilepropertiesofthesesteels
wereinvestigated;inparticular,thestrainhardeningandtheductilefracturebehaviorswerediscussed
in termsofthestrainpartitioningbetweentheferriteandmartensiteandtheformationandgrowth
of micro-voids,respectively.Whenthemartensitegrainssurroundtheferritegrainsandformachain-
like networkedstructure,thestrainhardenabilityisgreatlyimprovedwithoutasignificant lossof
elongation, whiletheneckingdeformabilityisconsiderablyreduced.Adigital-imagecorrelationanalysis
revealedthatthetensilestraininthemartensiteregioninthechain-likenetworkeddual-phase
structure ismarkedlyincreasedduringtensiledeformation,whichleadstoanimprovementinthestrain
hardenability.Ontheotherhand,thejointpartofthemartensitegrainsinthestructureactsasa
preferentialformationsiteformicro-voids.Thenumberdensityofthemicro-voidsrapidlyincreases
with increasingtensilestrain,whichwouldcausethelowerneckingdeformability.. |
| 70. |
Akama Daichi, Nakada Nobuo, Toshihiro Tsuchiyama, Setsuo Takaki, Akira Hironaka, Discontinuous yielding induced by the addition of nickel to interstitial-free steel, Scripta Materialia, 82, 13-16, 2014.03, Interstitial-free steels containing 1–3% Ni were tensile tested. A clear yield point and yield point elongation were observed in each
steel, even though they contained no solute carbon or nitrogen in the ferrite matrix. The mechanism could be explained by grain
refinement strengthening enhanced by the addition of Ni, which is derived from the increase in Hall–Petch coefficient caused by
grain boundary segregation.. |
| 71. |
Nakada Nobuo, K. Mizutani, Toshihiro Tsuchiyama, Setsuo Takaki, Difference in transformation behavior between ferrite and austenite formations in medium manganese steel, ACTA MATERIALIA, 10.1016/j.actamat.2013.10.067, 65, 251, 258, 2014.02. |
| 72. |
Setsuo Takaki, Akama Daichi, Nakada Nobuo, Toshihiro Tsuchiyama, Effect of Grain Boundary Segregation of Interstitial Elements on Hall-Petch Coefficient in Steels, MATERIALS TRANSACTIONS, 10.2320/matertrans.MA201314, 55, 1, 28-34, 2014.01. |
| 73. |
Nakada Nobuo, Toshihiro Tsuchiyama, Setsuo Takaki, Dirk Ponge, Dierk Raabe, Transition from Diffusive to Displacive Austenite Reversion in Low-Alloy Steel, ISIJ INTERNATIONAL, 10.2355/isijinternational.53.2275, 53, 12, 2275-2277, 2013.12. |
| 74. |
Nakada Nobuo, Reiji Fukagawa, Toshihiro Tsuchiyama, Setsuo Takaki, Dirk Ponge, Dierk RAABE, Inheritance of Dislocations and Crystallographic Texture during Martensitic Reversion into Austenite, ISIJ INTERNATIONAL, 10.2355/isijinternational.53.1286, 53, 7, 1286-1288, 2013.07. |
| 75. |
Yoshikazu Matsuoka, Tatsuya Iwasaki, Nakada Nobuo, Toshihiro Tsuchiyama, Setsuo Takaki, Effect of Grain Size on Thermal and Mechanical Stability of Austenite in Metastable Austenitic Stainless Steel, ISIJ INTERNATIONAL, 10.2355/isijinternational.53.1224, 53, 7, 1224-1230, 2013.07. |
| 76. |
Nakada Nobuo, Y. Arakawa, Toshihiro Tsuchiyama, Setsuo Takaki, Microstructural Control of Dual Phase Structure formed by Partial Reversion from cold-deformed Martensite, REX & GG 2013, 753, 191-194, 2013.05. |
| 77. |
Nakada Nobuo, Norihide Fukuzawa, Toshihiro Tsuchiyama, Setsuo Takaki, Tamotsu Koyano, Takashi Iwamoto, Yasuhiro Omori, Isothermal Transformation in Fe-N Hypereutectoid Alloy, ISIJ INTERNATIONAL, 10.2355/isijinternational.53.139, 53, 1, 139-144, 2013.01. |
| 78. |
N. NAKADA, Y. ARAKAWA, K. S. PARK, T. TSUCHIYAMA and S. TAKAKI, Dual Phase structure formed by partial reversion of sold-deformed martensite, Materials Science and Engineering A, 553, pp. 128-133, 2012.08. |
| 79. |
Junya Tobata, K. L. NGO-HUYNH, Nakada Nobuo, Toshihiro Tsuchiyma, Setsuo Takaki, Role of Silicon in Quenching and Partitioning Treatment of Low-carbon Martensitic Stainless Steel, ISIJ International, 52, 7, 1377-1382, 2012.07. |
| 80. |
赤間 大地, Akira Hironaka, Nakada Nobuo, Toshihiro Tsuchiyma, Setsuo Takaki, Yield Point Phenomenon in Ni Bearing IF Steel, Proceedings of The 3rd International Symposium on Steel Science 2012, 179-182, 2012.05. |
| 81. |
S. TAKAKI, K. L. NGO-HUYNH, N. NAKADA and T. TSUCHIYAMA, Strengthening Mechanism in Ultra Low Carbon Martensitic Steels, ISIJ International, 52, 4, pp. 710-716, 2012.04. |
| 82. |
Toshihiro Tsuchiyma, Nakada Nobuo, Setsuo Takaki, Norimitsu Koga, Distribution of elastic strain in a pearlite structure, Scripta Materialia, 67, 400-403, 2012.04. |
| 83. |
J. TAKAHASHI, K. KAWAKAMI, K. USHIODA, S. TAKAKI, N. NAKADA and T. TSUCHIYAMA, Quantitative analysis of grain boundaries in carbon- and nitrogen-added ferritic steels by atom prove tomography, Scripta Materialia, 66, pp. 207-210, 2012.01. |
| 84. |
N. NAKADA, M. MURAKAMI, T. TSUCHIYAMA and S. TAKAKI, Work Hardening Mechanism in Soft Particle Dispersion Ferritic Steel, Materials Science Forum Vols. 706-709 (THERMEC 2011), 706-709, pp. 2199-2204, 2012.01. |
| 85. |
A. HIRONAKA, N. NAKADA, T. TSUCHIYAMA and S. TAKAKI, Influence of Chromium on the Hall-Petch Coefficient in Ferritic Steel, Materials Science Forum Vols. 706-709 (THERMEC 2011), 706-709, pp. 2130-2133, 2012.01. |
| 86. |
T. TSUCHIYAMA, J. TOBATA, T. TAO, N. NAKADA and S. TAKAKI, Microstructure Control of a Low Carbon Martensitic Stainless Steel by Quenching and Partitioning Treatment, Materials Science Forum Vols. 706-709 (THERMEC 2011), 706-709, pp. 2338-2341, 2012.01. |
| 87. |
T. TSUCHIYAMA, J. TOBATA, T. TAO, N. NAKADA and S. TAKAKI, Quenching and Partitioning treatment of a low-carbon martensitic stainless steel, Materials Science and Engineering A, 532, pp. 585-592, 2012.01. |
| 88. |
N. NAKADA, H. ITO, Y. MATSUOKA, T. TSUCHIYAMA and S. TAKAKI, Microstructural and Crystallographic Characteristics of Deformation-induced Martensite formed in Cold-drawn 316 type Stainless Steel, Solid State Phenomena Vols., vol. 172-174, pp. 99-104, 2011.07. |
| 89. |
N. NAKADA, T. TSUCHIYAMA, S. TAKAKI and N. MIYANO, Temperature Dependence of Austenite Nucleation Behavior from Lath Martensite, ISIJ International, 51, 2, pp. 299-304, 2011.02. |
| 90. |
T. TSUCHIYAMA, M. NATORI, N. NAKADA and S. TAKAKI, Conditions for Grain Boundary Bulging during Tempering of Lath Martensite in Ultra-low Carbon Steel, ISIJ International, 50, 5, 771-773, 2010.05. |
| 91. |
M. MURAKAMI, N. NAKADA, T. TSUCHIYAMA, S. TAKAKI and Y. ADACHI, Multiple Precipitation Behavior of Niobium Carbide and Copper in Martensitic Steel, Advanced Materials Research Vols. 89-91(THERMEC 2009), pp. 395-399, 2010.04. |
| 92. |
N. NAKADA, T. TSUCHIYAMA, S. TAKAKI and N. MIYANO, Temperature Dependence of Austenite Nucleation Site on Reversion of Lath Martensite, Advanced Materials Research Vols. 89-91(THERMEC 2009), pp. 3424-3429, 2010.04. |
| 93. |
T. TSUCHIYAMA, T. ONOMOTO, K. TSUBOI and S. TAKAKI, Effect of Grain Refinement on Mechanical Properties in 25Cr-1N Austenitic Steel, Advanced Materials Research Vols. 89-91(THERMEC 2009), pp. 3549-3554, 2010.04. |
| 94. |
T. TSUCHIYAMA, H. TAKEBE, K. TSUBOI and S. TAKAKI, Surface-layer microstructure control for metastable austenitic stainless steel to prevent hydrogen permeation, Scripta Materialia, 62, pp. 731-734, 2010.03. |
| 95. |
N. NAKADA, H. ITO, Y. MATSUOKA, T. TSUCHIYAMA and S. TAKAKI, N. NAKADA, H. ITO, Y. MATSUOKA, T. TSUCHIYAMA and S. TAKAKI, Acta Materialia, 58, pp. 895-903, 2010.01. |
| 96. |
T. TSUCHIYAMA, T. ANDO and S. TAKAKI, Strengthening of Titanium Alloys by Interstitial Elements, Processing and Fabrication of Advanced Materials XVIII, pp. 777-786, 2009.12. |
| 97. |
Y. IMANAMI, M. MURAKAMI, N. NAKADA, T. TSUCHIYAMA and S. TAKAKI, Contribution of Soft Copper Particle on Work Hardening Behavior in Ferritic Iron, ISIJ International, 49, 8, pp. 1225-1228, 2009.08. |
| 98. |
T. ONOMOTO, Y. TERAZAWA, T. TSUCHIYAMA and S. TAKAKI, Effect of Grain Refinement on Tensile Properties in Fe-25Cr-1N Alloy, ISIJ International, 49, 8, pp. 1246-1252, 2009.08. |
| 99. |
Y. TERAZAWA, T. ANDO, T. TSUCHIYAMA and S. TAKAKI, Relationship between Work Hardening Behavior and Deformation Structure in Ni-free High Nitrogen Austenitic Stainless Steels, steel research international, 80 (2009), pp. 473-476, 2009.07. |
| 100. |
Y. IMANAMI, M. MURAKAMI, N. NAKADA, T. TSUCHIYAMA and S. TAKAKI, Contribution of Soft Cu Particles to Tensile Deformation Behavior in Iron, Journal of The Japan Society for Heat Treatment (Special Issue), 49, 2, pp. 526-528, 2009.04. |
| 101. |
K. L. NGO HUYNH, H. TAKEBE, K. NAKASHIMA, T. TSUCHIYAMA and S. TAKAKI, Effect of Solution Nitriding on Hardness and Microstructure of Martensitic Stainless Steel, Journal of The Japan Society for Heat Treatment (Special Issue), 49, 2, pp. 549-552, 2009.04. |
| 102. |
N. Nakada, N. Koga, T. Tsuchiyama and S. Takaki, Crystallographic orientation rotation and internal stress in pearlite colony, Scripta Materialia, 61 (2009) 133–136, 2009.03. |
| 103. |
T. TSUCHIYAMA, K. TASHIRO, N. NAKADA and S. TAKAKI, Microstructure and Mechanical Property of (Ferrite + Cr2N) Eutectoid-Structured High Nitrogen Steel, 1st International Conference on Interstitially Alloted Steels, pp. 25-28, 2008 , 2008.11. |
| 104. |
Y. TERAZAWA, T. ANDO, T. TSUCHIYAMA and S. TAKAKI, Relationship between Work Hardening Behavior and Deformation Structure in Ni-free High Nitrogen Austenitic Stainless Steels, 1st International Conference on Interstitially Alloted Steels, pp. 21-24, 2008 , 2008.11. |
| 105. |
M. MURAKAMI, Y. TAKANAGA, N. NAKADA, T. TSUCHIYAMA and S. TAKAKI, Microstructure and Mechanical Property of Copper Bearing Eutectoid Steel, ISIJ International, vol. 48 No. 10, pp. 1467-1472, 2008 , 2008.10. |
| 106. |
S. TAKAKI, K. TAKEDA, N. NAKADA and T. TSUCHIYAMA, Effect of Interstitial Impurity on Yielding Behavior in Ferritic Iron, 1st International Conference on Interstitially Alloted Steels, pp. 107-113, 2008 , 2008.10. |
| 107. |
K. TAKEDA, N. NAKADA, T. TSUCHIYAMA, S. TAKAKI, Effect of Interstitial Elements on Hall-Petch Coefficient of Ferritic Iron, ISIJ International, vol. 48 No. 8, pp. 1122-1125, 2008 , 2008.08. |
| 108. |
T. TSUCHIYAMA, Y. FUJII, Y. TERAZAWA, K. NAKASHIMA, T. ANDO and S. TAKAKI, Factors Inducing Intergranular Fracture in Nickel-free High Nitrogen Austenitic Stainless Steel Produced by Solution Nitriding, ISIJ International, vol. 48 No. 6, pp. 861-867, 2008, 2008.06. |
| 109. |
Tomohiro ANDO, Koichi NAKASHIMA, Toshihiro TSUCHIYAMA and Setsuo TAKAKI, Microstructure and mechanical properties of a high nitrogen titanium alloy, Materials Science and Engineering A, 486 (2008) 228–234, 2008.01. |
| 110. |
T. ANDO, K. NAKASHIMA, T. TSUCHIYAMA and S. TAKAKI, Precipitation of Fine Beta-Phase in High Nitrogen Titanium Alloy, Ti-2007 Science and Technology, vol. 1, pp. 587-590, 2007 , 2007.12. |
| 111. |
T. TSUCHIYAMA, S. HAMAMOTO, K. NAKASHIMA and S. TAKA, Fabrication of Fine-Grained β-Type Titanium Alloy through Mechanical Alloying Treatment, Ti-2007 Science and Technology, vol. 1, pp. 587-590, 2007 , 2007.12. |
| 112. |
N. NAKADA, T. TSUCHIYAMA, S. TAKAKI and S. HASHIZUME, Variant Selection of Reveresed Austenite in Lath Martensite, ISIJ International, vol. 47 No. 10, pp. 1527-1532, 2007, 2007.10. |
| 113. |
N. NAKADA, R. MATOBA, T. TSUCHIYAMA and S. TAKAKI, Relation between Yield strength and Nominal Grain Size in Duplex-grained IF steel, 4th International Symposium on Ultrafine Grained Steels (ISUGS-2007), pp. 117-122, 2007 , 2007.10. |
| 114. |
K. TAKEDA, N. NAKADA, T. TSUCHIYAMA, S. TAKAKI, Effect of Carbon and Nitrogen on Hall-Petch coefficient in Iron, 4th International Symposium on Ultrafine Grained Steels (ISUGS-2007), pp. 111-116, 2007 , 2007.10. |
| 115. |
T. TSUCHIYAMA, N. NAKADA, N. HIRAKAWA and S. TAKAKI, Grain Refinement through Reversion of Eutectoid Structure in High Nitrogen Austenitic Steel, 4th International Symposium on Ultrafine Grained Steels (ISUGS-2007), pp. 16-19, 2007 , 2007.10. |
| 116. |
T. INOUE, T. FUKUMARU, T. TSUCHIYAMA and S. TAKAKI, Tensile Property of Ultra Fine-grained Austenitic Steel Thin Wire Produced by Reversion of Deformation-induced Martensite, 4th International Symposium on Ultrafine Grained Steels (ISUGS-2007), pp. 133-137, 2007 , 2007.10. |
| 117. |
T. FUKUMARU, T. INOUE, T. TSUCHIYAMA and S. TAKAKI, Formation of Ultra Fine Grained Structure during Annealing of Heavily Drawn Metastable Steel Wire, Materials Science Forum Vols. 558-559 (ReX and GG III), pp. 1309-1312, 2007, 2007.06. |
| 118. |
M. NATORI, T. TSUCHIYAMA and S. TAKAKI, Grain Boundary Bulging during Tempering in Lath-Martensitic Steel, Materials Science Forum Vols. 558-559 (ReX and GG III), pp. 1309-1312, 2007 , 2007.06. |
| 119. |
K. NAKASHIMA, Y. FUJIMURA, T. TSUCHIYAMA and S. TAKAKI, Work Hardening Behavior of Low Carbon Martensitic Steel, Key Engineering Materials Vols. 345-346 (Mechanical Behavior of Materials X), pp. 189-192, 2007.05. |
| 120. |
T. ANDO, K. NAKASHIMA, T. TSUCHIYAMA and S. TAKAKI, Microstructure Control of High Nitrogen Alpha + Beta Type Titanium Alloy, Key Engineering Materials Vols. 345-346 (Mechanical Behavior of Materials X), pp. 189-192, 2007.05. |
| 121. |
N. NAKADA, N. HIRAKAWA, T. TSUCHIYAMA and S. TAKAKI, Grain Refinement of Nickel-free High Nitrogen Austenitic Stainless Steel by Reversion of Eutectoid Structure, Scripta Materialia, vol. 57 No. , pp. 153-156, 2007.03. |
| 122. |
J. SYARIF, K. NAKASHIMA, T. TSUCHIYAMA and S. TAKAKI, Effect of Solute Copper on Yield Strength in Dislocation-strengthened Steels, ISIJ International, vol. 47 No. 2, pp. 340-345, 2007.02. |
| 123. |
T. TSUCHIYAMA, S. HAMAMOTO, K. NAKASHIMA and S. TAKAKI , Microstructure of Fine-Grained β Type Titanium Alloy Produced by Mechanical Alloying and Consolidation Process, Materials Science and Engineering A, vol. 474 No. 1-2, pp. 120-127, 2007, 2007.01. |
| 124. |
T. NAKANISHI, T. TSUCHIYAMA, H. MITSUYASU, Y. IWAMOTO and S.TAKAKI, Effect of Partial Solution Nitriding on Mechanical Properties and Corrosion Resistance in a Type 316L Austenitic Stainless Steel Plate, Materials Science and Engineering A, vol. 460-461, pp. 186-194, 2007 , 2007.01. |
| 125. |
T. TSUCHIYAMA, N. HIRAKAWA, N. NAKADA and S. TAKAKI, Grain Refinement by Phase Transformations in Nickel-free High Nitrogen Steel, proceedings of International Conference on High Nitrogen Steels 2006, 2006.08. |
| 126. |
N. HIRAKAWA, N. NAKADA, T. TSUCHIYAMA and S. TAKAKI, Decomposition of Austenite in Fe-25Cr-1N Alloy Produced by Solution Nitriding, proceedings of International Conference on High Nitrogen Steels 2006, 2006.08. |
| 127. |
S. TAKAKI, K. KAWASAKI and T. TSUCHIYAMA, Hall-Petch Relation at Elevated Temperature for Ultar Fine Grained Iron, proceedings of ICASS 2006, 2006.08. |
| 128. |
N. NAKADA, T. TSUCHIYAMA, S. TAKAKI and S. HASHIZUME, Deformation -Induced Martensitic Transformation of Fine Austenite Grains Dispersed in Tempered Martensite
, proceedings of ICASS 2006, 2006.08. |
| 129. |
S. TAKAKI, Y. FUJIMURA, K. NAKASHIMA and T. TSUCHIYAMA, Effect of Dislocation Distribution on the Yielding of Highly Dislocated Iron, Materials Science Forum Vols. 539-543 (proceedings of THERMEC 2006), 2006.07. |
| 130. |
K. NAKASHIMA, Y. FUJIMURA, T. TSUCHIYAMA and S. TAKAKI, Effect of Carbon on Work Hardening Behavior of 18%Ni Martensitic Steel, Materials Science Forum Vols. 539-543 (proceedings of THERMEC 2006), 2006.07. |
| 131. |
T. TSUCHIYAMA, N. HIRAKAWA, N. NAKADA and S. TAKAKI, Decomposition of Austenite in Fe-25Cr-1N Alloy Produced by Solution Nitriding, Materials Science Forum Vols. 539-543 (proceedings of THERMEC 2006), 2006.07. |
| 132. |
T. FUKUMARU, T. TSUCHIYAMA and S. TAKAKI, Effect of (Wire Diameter/Grain Size) Ratio on Tesile Properties in Austenitic Stainless Fine Wire, proceedings of Asia Steel International Conference 2006, 2006.05. |
| 133. |
T. TSUCHIYAMA, R. HIROTA, K. FUKUNAGA and S. TAKAKI, Formation of Isotropic Structure through Recrystallization in a Ferritic Stainless Steel, proceedings of Asia Steel International Conference 2006, 2006.05. |
| 134. |
M. NATORI, T. TSUCHIYAMA and S. TAKAKI, Change in Recrystallization Behavior by Prior Deformation in Ultralow Carbon Martensitic Steel, proceedings of Asia Steel International Conference 2006, 2006.05. |
| 135. |
N. NAKADA, K. IMAKAWA, Y. FUTAMURA, S. HATA, T. TSUCHIYAMA and S. TAKAKI, Retardation of Austenitic Grain Growth by Grain Boundary Segregation of Copper in Low Carbon Steels, proceedings of Asia Steel International Conference 2006, 2006.05. |
| 136. |
Y. FUJIMURA, K. NAKASHIMA, T. TSUCHIYAMA and S. TAKAKI, Dislocation Strengthening in Ultralow Carbon 18%Ni Martensitic Steel, TheJoint International Conference of HSLA Steels 2005 and ISUGS 2005 PROCEEDINGS, 2005.11. |
| 137. |
Difference in Recrystallization Behavior between Martensite and Deformed Ferrite
Y. FUTAMURA M. NATORI T. TSUCHIYAMA and S. TAKAKI
Materials Science Forum Vols. 467-470 (ReX and GG II)
Vol. (2004)pp.263-268.. |
| 138. |
Effect of Initial Microstructure on Superplasticity in Ultrafine Grained 18Cr-9Ni Stainless Steel
T. TSUCHIYAMA Y. NAKAMURA H. HIDAKA and S. TAKAKI
Materials Transactions
Vol.45 7(2004)pp.2259-2263.. |
| 139. |
Effect of Grain Refinement on Thermal Stability of Metastable Austenitic Steel
S. TAKAKI K. FUKUNAGA J. SYARIF and T. TSUCHIYAMA
Materials Transactions
Vol.45 7(2004)pp.2245-2251.. |
| 140. |
Effect of Initial Microstructure on Recrystallization Behavior during Annealing
M. NATORI Y. FUTAMURA T. TSUCHIYAMA and S. TAKAKI
Proceedings of 8th Ultra-Steel Workshop
Vol. (2004)pp.222-223.. |
| 141. |
Importance of Size-Distribution of Dispersed Particles in Particle Dispersion Strengthening
T. KITAURA H. HIDAKA T. TSUCHIYAMA and S. TAKAKI
Proceedings of International Symposium on Ultrafine Grained Steels (ISUGS 2003)
Vol.CD-ROM (2003)pp.-.. |
| 142. |
Formation of TiB Particles during Reaction Sintering in a TiB/Ti Composite
T. YOSHIHIRO T. TSUCHIYAMA and S. TAKAKI
Journal of the Japan Institute of Metals
Vol.67 7(2003)pp.362-367.. |
| 143. |
H. HIDAKA K. KAWASAKI T. TSUCHIYAMA and S. TAKAKI, Effect of Carbon on Nano-Crystallization in Steel during Mechanical Milling Treatment, Materials Transactions, 10.2320/matertrans.44.1912, 44, 10, 1912-1918, Vol.44 No.10 pp.1912-1918, 2003.01. |
| 144. |
H. HIDAKA T. TSUCHIYAMA and S. TAKAKI, Microstructural Change during Mechanical Milling Treatment in Fe-C Alloy Powders with Different Initial Microstructure, Materials Science Forum Vols. 426-432, 426-4, 2717-2722, Vol.3 No. pp.2717-2722, 2003.01. |
| 145. |
T. TSUCHIYAMA and S. TAKAKI, Thermodynamics of Nitrogen Absorption into Solid Solution in Fe-Cr-Mn Ternary Alloys, Materials Science Forum Vols. 426-432, 426-4, 957-962, Vol.2 No. pp.957-962, 2003.01. |
| 146. |
T. TSUCHIYAMA H. ITO K. KATAOKA and S. TAKAKI, Fabrication of Ultrahigh Nitrogen Austenitic Steels by Nitrogen Gas Absorption into Solid Solution, Metallurgical and Materials Transactions A, 10.1007/s11661-003-0018-z, 34A, 11, 2591-2599, Vol.34A No.11 pp.2591-2599, 2003.01. |
| 147. |
Y. FUTAMURA T. TSUCHIYAMA and S. TAKAKI, Ostwald Ripening Behavior of Cu Particles in Martensitic Steels, Proceedings of International Symposium on Ultrafine Grained Steels (ISUGS 2003), Vol.CD-ROM No. pp.-, 2003.01. |
| 148. |
T. TSUCHIYAMA Y. NAKAMURA H. HIDAKA and S. TAKAKI, Superplasticity of Austenitic Stainless Steel Containing Thermally Unstable Martensite Particles, Proceedings of International Symposium on Ultrafine Grained Steels (ISUGS 2003), Vol.CD-ROM No. pp.-, 2003.01. |
| 149. |
Grain Size Control by Oxide Dispersion in Austenitic Stainless Steel
K. TAKANO R. NAKAO N. FUKUMOTO T. TSUCHIYAMA and S. TAKAKI
Tetsu-to-Hagane
Vol.89 5(2003)pp.616-622.. |
| 150. |
S. TAKAKI K. FUKUNAGA and T. TSUCHIYAMA, Effect of Grain Refinement on Thermal Stability of Metastable Austenite, Proceedings of International Symposium on Ultrafine Grained Steels (ISUGS 2003), 10.2320/matertrans.45.2245, 45, 7, 2245-2251, Vol.CD-ROM No. pp.-, 2003.01. |
| 151. |
S. NAKADA S. JUNAIDI T. TSUCHIYAMA and S. TAKAKI, Effect of Copper Particles on Softening Behavior During Tempering in 9% Nickel Martensitic Steels, Proceedings of International Symposium on Ultrafine Grained Steels (ISUGS 2003), Vol.CD-ROM No. pp.-, 2003.01. |
| 152. |
M. SUZUKI K. NAKASHIMA Y. FUTAMURA S. JUNAIDI T. TSUCHIYAMA and S. TAKAKI, Bailey-Hirsch Relationship in Deformed Iron and Martensitic Steels, Proceedings of International Symposium on Ultrafine Grained Steels (ISUGS 2003), Vol.CD-ROM No. pp.-, 2003.01. |
| 153. |
K. KAWASAKI T. TSUCHIYAMA and S.TAKAKI, Temperature Dependence of Hall-Petch Relationship in Ultra Fine Grained Iron, Proceedings of International Symposium on Ultrafine Grained Steels (ISUGS 2003), Vol.CD-ROM No. pp.-, 2003.01. |
| 154. |
Effect of Cu Addition on Formation of Reversed Austenite and Hardness in 9%Ni steels
N. NAKADA T. YAMASHITA J. SYARIF T. TSUCHIYAMA and S. TAKAKI
Tetsu-to-Hagane
Vol.89 10(2003)pp.1050-1056.. |
| 155. |
Effect of Boron Recrystallization Behavior in Ultra-Low Carbon Martensitic Steel
Y. FUTAMURA T. KAWAMURA T. TSUCHIYAMA and S. TAKAKI
Tetsu-to-Hagane
Vol.80 3(2003)pp.335-341.. |
| 156. |
J. SYARIF T. TSUCHIYAMA and S. TAKAKI, Mechanism of Toughening in Ferritic Iron by Solute Copper at Low Temperature, ISIJ International, 10.2355/isijinternational.43.1100, 43, 7, 1100-1104, Vol.43 No.7 pp.1100-1104, 2003.01. |
| 157. |
Precipitation Strengthening at Elevated Temperature in Fe-Cu Alloys
K. NAKASHIMA Y. FUTAMURA T. TSUCHIYMA and S. TAKAKI
Tetsu-to-Hagane
Vol.89 5(2003)pp.524-529.. |
| 158. |
Effects of Prior Deformation on Dispersion of Carbide Precipitates during Isothermal Transformation in 12%Cr-0.1%C Steel
K. TAKANO T. TSUCHIYAMA and S. TAKAKI
Tetsu-to-Hagane
Vol.88 11(2002)pp.779-785.. |
| 159. |
K. NAKASHIMA Y. FUTAMURA T. TSUCHIYAMA and S. TAKAKI, Interaction between Dislocation and Copper Particles in Fe-Cu Alloys, Proceedings of First International Conference on Advanced Structural Steels (ICASS 2002), Vol. No. pp.177-178, 2002.01. |
| 160. |
H. HIDAKA T. TSUCHIYAMA and S. TAKAKI, Effect of Oxide Addition on Thermal Stability of Ultra Fine-Grained Structure in Iron, Proceedings of First International Conference on Advanced Structural Steels (ICASS 2002), Vol. No. pp.59-60, 2002.01. |
| 161. |
K. NAKASHIMA Y. FUTAMURA T. TSUCHIYAMA and S. TAKAKI, Interaction between Dislocation and Copper Particles in Fe-Cu Alloys, ISIJ International, 10.2355/isijinternational.42.1541, 42, 12, 1541-1545, Vol.42 No.12 pp.1541-1545, 2002.01. |
| 162. |
Y. FUTAMURA T. TSUCHIYAMA and S. TAKAKI, Embrittlement in Copper Bearing Heat Resistant Martensitic Steels, Proceedings of First International Conference on Advanced Structural Steels (ICASS 2002), Vol. No. pp.201-202, 2002.01. |
| 163. |
T. TSUCHIYAMA H. UCHIDA K. KATAOKA and S. TAKAKI, Fabrication of Fine-Grained High Nitrogen Austenitic Steels through Mechanical Alloying Treatment, ISIJ International, 10.2355/isijinternational.42.1438, 42, 12, 1438-1443, Vol.42 No.12 pp.1438-1443, 2002.01. |
| 164. |
T. TSUCHIYAMA H. UCHIDA K. KATAOKA and S. TAKAKI, Fabrication of Fine-Grained High Nitrogen Austenitic Steels through Mechanical Alloying Treatment, Proceedings of First International Conference on Advanced Structural Steels (ICASS 2002), Vol. No. pp.57-58, 2002.01. |
| 165. |
H. HIDAKA T. TSUCHIYAMA and S. TAKAKI, Relation between Microstructure and Hardness in Fe-C Alloys with Ultra Fine Grained Structure, Scripta Materialia, 10.1016/S1359-6462(01)00714-X, 44, 8-9, 1503-1506, Vol.44 No.8/9 pp.1503-1506, 2001.01. |
| 166. |
Isothermal Transformation Behavior in 12%Cr-0.3%C Steel
M. MIKAMI T. TSUCHIYAMA and S. TAKAKI
Tetsu-to-Hagane
Vol.87 1(2001)pp.49-54.. |
| 167. |
Microstructure and Mechanical Properties of Fine-Grained High Nitrogen Steels Fabricated through Mechanical Alloying Treatment
H. UCHIDA K. KATAOKA T. TSUCHIYAMA H. GOTO and S. TAKAKI
Journal of the Japan Society of Powder and Powder Metallurgy
Vol.48 10(2001)pp.980-985.. |
| 168. |
K. KAWASAKI H. HIDAKA T. TSUCHIYAMA and S. TAKAKI, Temperature Dependence of Deformation Behavior in Ultra Fine-Grained Iron, Proceedings of International Symposium on Ultrafine Grained Steels (ISUGS 2001), Vol. No. pp.244-247, 2001.01. |
| 169. |
K. KASUYA H. HIDAKA T. TSUCHIYAMA and S. TAKAKI, Transformation Behavior Controlled by Fine Oxide Particles in Fine-Grained Eutectoid Steel, Proceedings of International Symposium on Ultrafine Grained Steels (ISUGS 2001), Vol. No. pp.202-205, 2001.01. |
| 170. |
J. SYARIF T. TSUCHIYAMA and S. TAKAKI, Mechanism of Grain Refining of Austenite by Copper Addition in 8mass%Ni Martensitic Steel, Proceedings of the Fourth Pacific Rim International Conference on Advanced Materials and Processing (PRICM4), 1955-1958, Vol. No. pp.1955-1958, 2001.01. |
| 171. |
Y. FUTAMURA T. TSUCHIYMA and S. TAKAKI, Embrittlement through Cu addition and Its Improvement in Heat Resistant Martensitic Steels, Proceedings of International Conference on Processing and Manufacturing of Advanced Materials (THERMEC 2000), Vol. No. pp.CD ROM C1-7, 2001.01. |
| 172. |
Isothermal Transformation Behavior in 12%Cr-0.3%C Steel with Partial Solution Treatment
H. INABA M. MIKAMI Y. ONO T. TSUCHIYAMA and S. TAKAKI
Tetsu-to-Hagane
Vol.87 9(2001)pp.613-618.. |
| 173. |
T. TSUCHIYAMA and S. TAKAKI, Recrystallization Mechanism of Lath Martensite in High Chromium Steel, Recrystallization and Grain Growth, 803-808, Vol.2 No. pp.803-808, 2001.01. |
| 174. |
Y. FUTAMURA T. TSUCHIYAMA and S. TAKAKI, Effect of Solute Copper on Grain Growth of Austenite in High Chromium Steels, Recrystallization and Grain Growth, 367-372, Vol.1 No. pp.367-372, 2001.01. |
| 175. |
Microstructure Control and Superplasticity of Sintered Ti-4%Cr-Al Alloy
S. HIRONAKA T. TSUCHIYAMA and S. TAKAKI
Journal of the Japan Society of Powder and Powder Metallurgy
Vol.48 1(2001)pp.39-44.. |
| 176. |
Y. FUTAMURA T. TSUCHIYAMA and S. TAKAKI, Strengthening Mechanism of Cu bearing Heat Resistant Martensitic Steels, ISIJ International (Supplement), 10.2355/isijinternational.41.Suppl_S106, 41, S106-S110, Vol.41 No.0 pp.S106-S110, 2001.01. |
| 177. |
T. TSUCHIYAMA Y. MIYAMOTO and S. TAKAKI, Recrystallization of Lath Martensite with Bulge Nucleation and Growth Mechanism, ISIJ International, 10.2355/isijinternational.41.1047, 41, 9, 1047-1052, Vol.41 No.9 pp.1047-1052, 2001.01. |
| 178. |
H. UCHIDA H. HIDAKA T. TSUCHIYAMA and S. TAKAKI, Microstructure and Mechanical Properties of Fine-Grained High Nitrogen Stainless Steels Fabricated through Mechanical Alloying Treatment, Proceedings of International Symposium on Ultrafine Grained Steels (ISUGS 2001), Vol. No. pp.298-301, 2001.01. |
| 179. |
K. KATAOKA T. TSUCHIYAMA H. GOTO and S. TAKAKI, Fabrication of a High Nitrogen Stainless Steel by Powder Metallurgy Process through Mechanical Milling Treatment, Proceedings of International Conference on Processing and Manufacturing of Advanced Materials (THERMEC 2000), Vol. No. pp.CD ROM B1-4, 2001.01. |
| 180. |
T. TSUCHIYAMA Y. ONO and S. TAKAKI, Microstructure Control for Toughening a High Carbon Martensitic Stainless Steel, ISIJ International (Supplement), Vol.40 No.0 pp.S184-S188, 2000.01. |
| 181. |
H. HIDAKA S. NAKAMYO T. TSUCHIYAMA and S. TAKAKI, Contribution of Oxide Particles to Thermal Stability of Ultra Fine-Grained Structure, Proceedings of 1st International Conference on Advanced Materials Processing, Vol.0 No.0 pp.601-606, 2000.01. |
| 182. |
Effect of Solute Copper on Hardness and Ductile-to-Brittle Transition in α-Iron
J. SYARIF T. HOSHINO T. TSUCHIYAMA and S. TAKAKI
Tetsu-to-Hagane
Vol.86 8(2000)pp.558-562.. |
| 183. |
T. TSUCHIYAMA Y. FUTAMURA and S. TAKAKI, Strengthening of Heat Resistant Steel by Cu Addition, Key Engineering Materials Vols. 171-174 (Creep and Fracture of Engineering Materials and Structures), 171-1, 411-417, Vol.0 No.0 pp.411-418, 2000.01. |
| 184. |
J. SYARIF T. HOSHINO T. TSUCHIYAMA and S. TAKAKI, Effect of Solute Copper on Low Temperature Toughness in α-Iron, Proceedings of the 10th Iketani Conference on Materials Research Toward 21st Century, Vol.0 No.0 pp.117-118, 2000.01. |
| 185. |
K. IWANAGA T. TSUCHIYAMA and S. TAKAKI, Strengthening Mechanisms in Heat-Resistant Martensitic 9Cr Steels, Key Engineering Materials Vols. 171-174 (Creep and Fracture of Engineering Materials and Structures), 171-1, 477-482, Vol.0 No.0 pp.477-482, 2000.01. |
| 186. |
K. IWANAGA T. TSUCHIYAMA and S. TAKAKI, Effect of Solute Alloying Elements on Creep Deformation Behavior in High Cr Martensitic Steels, Proceedings of STAINLESS STEEL99 SCIENCE AND MARKET, Vol.2 No.0 pp.447-452, 1999.01. |
| 187. |
Y. ONO T. TSUCHIYAMA and S. TAKAKI, Reversion from Eutectoid Structure to Austenite in High Manganese Austenitic Steels, Solid-Solid Phase Transformations II, 1641-1644, Vol.0 No.0 pp.1641-1644, 1999.01. |
| 188. |
Y. FUTAMURA T. TSUCHIYAMA and S. TAKAKI, Microstructure and Strengthening Mechanism of Cu Bearing High Cr Martensitic Steels, Solid-Solid Phase Transformations II, 1601-1604, Vol.0 No.0 pp.1601-1604, 1999.01. |
| 189. |
T. TSUCHIYAMA and S. TAKAKI, Effect of Partial SolutionTreatment on Toughness of 12%Cr-0.3%C Steels, ISIJ International, 10.2355/isijinternational.39.202, 39, 2, 202-208, Vol.39 No.2 pp.202-208, 1999.01. |
| 190. |
T. TSUCHIYAMA and S. TAKAKI, Variants of M23C6 Type Carbide Precipitate in Deformed High Chromium Martensitic Steel, Solid-Solid Phase Transformations II, 1613-1616, Vol.0 No.0 pp.1613-1616, 1999.01. |
| 191. |
K. OKAZAKI T. TSUCHIYAMA N. Nakamura and S. TAKAKI, Superplasticity of Sintered Titanium Alloy with Martensitic Structure, Materials Science Forum Vols. 304-306 (Towards Innovation in Superplasticity II), 304-3, 121-126, Vol.0 No.0 pp.121-126, 1999.01. |
| 192. |
T. TSUCHIYAMA and S. TAKAKI, Effect of Ni addition on Softening Behavior During Tempering in Martensitic Stainless Steels, Proceedings of STAINLESS STEEL99 SCIENCE AND MARKET, Vol.2 No.0 pp.127-135, 1999.01. |
| 193. |
N. NAKAMURA T. TSUCHIYAMA and S. TAKAKI, Effect of Structural Factors on the Mechanical Properties of High Nitrogen Austenitic Steel, Materials Science Forum Vols. 318-320 (High Nitrogen Steels), 318-3, 209-214, Vol.0 No.0 pp.209-214, 1999.01. |
| 194. |
Fabrication of High Nitrogen Austenitic Stainless Steels by Powder Metallurgy
K. KATAOKA T. TSUCHIYAMA H. GOTO and S. TAKAKI
Journal of the Japan Society of Powder and Powder Metallurgy
Vol.46 11(1999)pp.1249-1255.. |
| 195. |
Fabrication of Stainless Steels with Composit Structure by Nitrogen Gas Atmosphere Sintering
K. KATAOKA N. NAKAMURA T. TSUCHIYAMA H. GOTO and S. TAKAKI
Journal of the Japan Society of Powder and Powder Metallurgy
Vol.46 11(1999)pp.1136-1140.. |
| 196. |
Effect of Cu addition on Phase Transformation in 9mass%Cr Martensitic Steels
Y. FUTAMURA T. TSUCHIYAMA and S. TAKAKI
Tetsu-to-Hagane
Vol.85 9(1999)pp.697-702.. |
| 197. |
Microstructural Change during Isothermal Aging in High Manganese Austenitic Steels
Y. ONO T. TSUCHIYAMA and S. TAKAKI
Tetsu-to-Hagane
Vol.84 4(1998)pp.309-314.. |
| 198. |
T. TSUCHIYAMA and S. TAKAKI, Formation of Reversed Austenite from M23C6 Type Carbide in High Chromium Martensitic Steel, Proceedings of the Third Pacific Rim International Conference on Advanced Materials and Processing (PRICM3), Vol.1 No.0 pp.1187-1192, 1998.01. |
| 199. |
Phase Transformation Mechanism of Ferritic Stainless Steel by Nitrogen Absorption
N. NAKAMURA T. TSUCHIYAMA and S. TAKAKI
Tetsu-to-Hagane
Vol.84 6(1998)pp.441-445.. |
| 200. |
Relationship between Creep Behavior and Microstructure in Martensitic Heat Resistant Steel
K. IWANAGA T. TSUCHIYAMA and S. TAKAKI
Tetsu-to-Hagane
Vol.84 12(1998)pp.896-901.. |
| 201. |
T. TSUCHIYAMA and S. TAKAKI, Microstructure Control of a High Carbon Martensitic Stainless Steel by Partial Solution Treatment, Proceedings of International Conference on Thermomechanical Processing of Steels & Other Materials (THERMEC97), 203-208, Vol.2 No.0 pp.203-208, 1997.01. |
| 202. |
T. TSUCHIYAMA Y. ONO and S. TAKAKI, Mechanism of Isothermal Eutectoid Transformation in High Carbon Stainless Steels, ISIJ International, 10.2355/isijinternational.37.715, 37, 7, 715-720, Vol.37 No.7 pp.715-720, 1997.01. |
| 203. |
Effect of Partial Solution Treatment on Martensitic Transformation of 12%Cr Steels
T. TSUCHIYAMA and S. TAKAKI
Tetsu-to-Hagane
Vol.82 12(1996)pp.1035-1040.. |
| 204. |
Austenite Grain Size Control by Insoluble Carbide in Martensitic Stainless Steels
T. TSUCHIYAMA S. TAKAKI and S. NAKAMURA
Tetsu-to-Hagane
Vol.81 2(1995)pp.147-152.. |
| 205. |
Effects of Insoluble Carbide on Microstructure and Hardness of Matensitic Stainless Steels
T. TSUCHIYAMA S. TAKAKI and S. NAKAMURA
Tetsu-to-Hagane
Vol.80 12(1994)pp.938-943.. |
