Kyushu University Academic Staff Educational and Research Activities Database
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Mitsuhara Masatoshi Last modified date:2019.10.17



Graduate School
Undergraduate School


Academic Degree
Dr. Eng.
Country of degree conferring institution (Overseas)
No
Field of Specialization
Physical Metallurgy
Total Priod of education and research career in the foreign country
01years00months
Research
Research Interests
  • Mechanical properties in Al alloys fabricated by additive manufacturing method
    keyword : Additive manufacturing method, Al alloys, Mechanical properties
    2013.04.
  • Microstructure and creep deformation in weld joint of ferritic heat-resistant steel
    keyword : Ferritic heat-resistant steel, Weld joint, Microstructure, Creep
    2010.04.
  • Development of new ferritic heat-resistant steels with nitrogen
    keyword : Ferritic heat-resistant steel, Nitrogen, Creep, Precipitation
    2011.04.
  • Slip and twinning deformation in pure-Ti and Ti alloys
    keyword : Ti, Slip deformation, Twinning, Dislocation
    2015.04.
  • Tribological properties and microstructure in nano-structured iron and steel
    keyword : Nano-structure, Steel, Tribology
    2015.10.
  • Creep strengthening and weakening mechanism in high Cr ferritic heat-resistant steel
    keyword : creep, high Cr ferritic heat-resistant steel, precipitation strengthening, dislocation microstructure, lath martensite, carbide
    2012.04~2016.03.
  • Crystallographic analysis of microstructural evolution in lath martensite during creep deformation
    keyword : Heat resistant steel, Lath martensite, Creep deformation, SEM-EBSD
    2007.04.
  • 3D visualization and quantitative analysis of dislocation microstructure in crystalline materials
    keyword : Dislocation, TEM, STEM, Electron tomography
    2008.04.
Academic Activities
Papers
1. Shigeto Yamasaki, Masatoshi Mitsuhara, Hideharu Nakashima, Development of High-Chromium Ferritic Heat-Resistant Steels with High Nitrogen Content, ISIJ International, 58, 6, 2018.06.
2. Chengwu wang, Syuhei kurokawa, Toshiro Doi, Julong Yuan, Masatoshi Mitsuhara, Weifeng Yao, Kehua Zhang, SEM, AFM and TEM Studies for Femtosecond Laser Irradiation Effect on 4H-SiC Substrate at Near Threshold Fluence, the ECS Journal of Solid State Science and Technology, 7, 2, 29-34, 2018.02.
3. Motomichi Koyama, Keita Yamanouchi, Qinghua Wang, Shien Ri, Yoshihisa Tanaka, Yasuaki Hamano, Shigeto Yamasaki, Masatoshi Mitsuhara, Masataka Ohkubo, Hiroshi Noguchi, Kaneaki Tsuzaki, Multiscale in situ deformation experiments
A sequential process from strain localization to failure in a laminated Ti-6Al-4V alloy, Materials Characterization, 10.1016/j.matchar.2017.04.010, 128, 217-225, 2017.06, The microscopic factors causing tensile failure of an α/β laminated Ti-6Al-4V alloy were investigated through in situ scanning electron microscopy and sampling moiré at an ambient temperature. Specifically, multiscale in situ microscopic observations were conducted to extract the most crucial factor of the failure. Slip localization in the vicinity of an intergranular α-sheet was clarified to be the primary factor that causes failure of the Ti-6Al-4V alloy. In addition, no relationship between interfacial strain localization and macroscopic shear localization at 45 degrees against the tensile direction was observed..
4. Shigeto Yamasaki, Masatoshi Mitsuhara, Hideharu Nakashima, Mitsuharu Yonemura, Evaluation of local creep strain in face-centred cubic heatresistant alloys using electron backscattered diffraction analysis, ISIJ International, 10.2355/isijinternational.ISIJINT-2016-712, 57, 5, 851-856, 2017.05, Creep strain in SUS347HTB austenitic heat-resistant steel and Ni-based heat-resistant alloys was evaluated by electron backscattered diffraction (EBSD). Localized crystallographic misorientations in the crept samples were quantified by using misorientation indicators such as kernel average misorientation and grain reference orientation deviation. In most crept samples, the misorientation indicators increased with creep deformation. However, this trend was not observed for alloys with dense dispersions. We proposed a method to extract and evaluate data only near the grain boundary from the total EBSD data. For Ni-based alloys, the misorientation indicators tended to increase preferentially near grain boundaries. Conversely, there was no substantial difference between the misorientation indicators near grain boundaries and the intergranular region for SUS347HTB. Consequently, although it is necessary to limit the region for evaluating the misorientation indicators according to the dispersion density of the reinforcing phase in the materials, the misorientation indicators, such as kernel average misorientation or grain reference orientation deviation, are useful for evaluating the creep strain in face-centred cubic heat-resistant alloys..
5. Shigeto Yamasaki, Masatoshi Mitsuhara, Hideharu Nakashima, Deformation microstructure and fracture behavior in creep-exposed Alloy 617, Materials Transactions, 10.2320/matertrans.M2016407, 58, 3, 442-449, 2017.03, The causes of the change in creep rupture ductility with the creep test temperature in Alloy 617 were investigated. The rupture ductility in the creep test was low at 700°C, whereas it was high at 800°C. Although the rupture ductility depended on the creep test temperature, creep fracture occurred due to cavity formation at the grain boundaries under all the creep conditions. In the sample crept at 800°C, subgrains developed with creep deformation. However, the crept sample at 700°C fractured before the subgrain formation. Although the work hardening due to the creep deformation occurred at 700°C, the work hardening in the sample crept at 800°C was small. The deformation of the grains was suppressed by the work hardening and by γ particle dispersion strengthening at 700°C. The difference in the strength in the crystal grains that resulted from the microstructure formed during creep caused the difference in the growth of the cavities..
6. Joshua A. Stuckner, Guo Quan Lu, Masatoshi Mitsuhara, William T. Reynolds, Mitsuhiro Murayama, The Influence of Processing Conditions on the 3-D Interconnected Structure of Nanosilver Paste, IEEE Transactions on Electron Devices, 10.1109/TED.2016.2639363, 64, 2, 494-499, 2017.02, Nanosilver paste is a promising material for power device interconnects. Interconnects are fabricated from nanosilver paste through a sintering process that drives off solvents and dispersants and fuses the silver particles. The integrity of the resulting interconnect is affected by the silver microstructure. This paper explored how sintering temperature, atmosphere, and time influenced microstructure as revealed by transmission electron microscopy and 3-D imaging via dual-beam serial sectioning. Nanosilver paste was sintered in combinations of the following parameters: A sintering atmosphere of air or nitrogen; temperatures of 120 °C or 255 °C; and sintering times of 5, 10, or 30 min. For the 255 °C temperature, oxygen in air facilitated removal of organic solvent and dispersant molecules and led to a microstructure with a coarser ligament network than samples sintered at the same temperature and times in nitrogen. The coarser ligament network was characterized by thick connected ligaments, large connected pores, and few isolated pores; this microstructure has been correlatedwith improved mechanical strength. Details of both 2-D and 3-D ligament network morphology, grain morphology, grain size, and the associated grain boundaries are discussed..
7. Masaru Itakura, Shin ichi Murayama, Masatoshi Mitsuhara, Minoru Nishida, Hiroaki Koga, Masaki Nakano, Hirotoshi Fukunaga, Microstructures of Ta-inserted SmCo5/Fe nanocomposite thick film magnets, Materials Transactions, 10.2320/matertrans.M2017035, 58, 10, 1351-1355, 2017.01, Ta-inserted SmCo5/Fe nanocomposite thick film magnets were synthesized by high-speed pulsed laser deposition followed by pulse annealing. The microstructures of the film magnets were characterized by high-resolution scanning electron microscopy and scanning transmission electron microscopy. The as-deposited thick film possessed a multilayered Sm-Co/Ta/α-Fe/Ta structure with amorphous Sm-Co layers and [110]-oriented crystalline α-Fe layers. After pulse annealing, many fine grains of Laves phase TaCo2 were formed, and then the multilayered structure was converted to a granular nanocomposite thick film magnet composed of fine crystalline grains of Sm(Co, Fe)5, α-(Fe, Co), and TaCo2. The volume fractions and grain sizes of hard magnetic Sm(Co, Fe)5, soft magnetic α-(Fe, Co), and TaCo2 were controlled by the thicknesses of the Ta layer, producing a nanocomposite thick film magnet with good exchange coupling..
8. Fumiya Watanabe, Zeid A. Nima, Takumi Honda, Masatoshi Mitsuhara, Minoru Nishida, Alexandru S. Biris, X-ray photoelectron spectroscopy and transmission electron microscopy analysis of silver-coated gold nanorods designed for bionanotechnology applications, Nanotechnology, 10.1088/1361-6528/28/2/025704, 28, 2, 2017.01, Multicomponent nano-agents were designed and built via a core-shell approach to enhance their surface enhanced Raman scattering (SERS) signals. These nano-agents had 36 nm �12 nm gold nanorod cores coated by 4 nm thick silver shell films and a subsequent thin bifunctional thiolated polyethylene glycol (HS-PEG-COOH) layer. Ambient time-lapsed SERS signal measurements of these functionalized nanorods taken over a two-week period indicated no signal degradation, suggesting that large portions of the silver shells remained in pure metallic form. The morphology of the nanorods was characterized by transmission electron microscopy (TEM) and ultra-high resolution scanning TEM. X-ray photoelectron spectroscopy (XPS) and Auger electron spectroscopy (AES) were utilized to assess the oxidation states of the silver shells covered by HS-PEG-COOH. The binding energies of Ag 3d XPS spectra yielded very small chemical shifts with oxidation; however, the AES peak shapes gave meaningful information about the extent of oxidation undergone by the nano-agent. While the silver shells without HS-PEG-COOH coatings oxidized significantly, the silver shells with HS-PEG-COOH remained predominantly metallic. In fact, six month-old samples still retained mostly metallic silver shells. These findings further demonstrate the stability and longevity of the nanostructures, indicating their significant potential as plasmonically active agents for highly sensitive detection in various biological systems, including cancer cells, tissues, or even organisms..
9. Takanori Ito, Shigeto Yamasaki, Masatoshi Mitsuhara, Minoru Nishida, Mitsuharu Yonemura, Effect of intergranular carbides on creep strength in nickel-based heat-resistant alloys, Materials Transactions, 10.2320/matertrans.M2016291, 58, 1, 52-58, 2017.01, Creep behaviors and microstructures for two Ni-based heat-resistant alloys with different carbon contents were investigated. The chemical compositions of the alloys were Ni-20Cr-15Co-6Mo-1Ti-2Al-2Nb-0.004 and 0.021C (mass%). The 0.004C and 0.021C alloys are referred to as the low-and high-C alloys, respectively. After solid-solution treatment at 1373 K for 1 h and isothermal annealing at 1023 K for 32 h, fine Ni3Al (γ) particles were formed in the grain interior of both alloys. The average diameter and number density of γ particles were similar in both alloys. M23C6 carbides were formed on grain boundaries after the isothermal annealing. Coverage ratios with the carbides in the high-C alloy were higher than that in the low-C alloys. Creep tests were performed at 1123 K and 130 MPa. The rupture time for the high-C alloy was longer than that for the low-C alloy, though both minimum creep rates were similar. In the high-C alloy, the creep strain was stored uniformly in the grain interior and the formation of a precipitate-free zone during the creep deformation was suppressed. Therefore, intergranular carbides with a high coverage ratio decreased the creep rate in the acceleration region..
10. L. Morsdorf, O. Jeannin, D. Barbier, Masatoshi Mitsuhara, D. Raabe, C. C. Tasan, Multiple mechanisms of lath martensite plasticity, Acta Materialia, 10.1016/j.actamat.2016.09.006, 121, 202-214, 2016.12, The multi-scale complexity of lath martensitic microstructures requires scale-bridging analyses to better understand the deformation mechanisms activated therein. In this study, plasticity in lath martensite is investigated by multi-field mapping of deformation-induced microstructure, topography, and strain evolution at different spatial resolution vs. field-of-view combinations. These investigations reveal site-specific initiation of dislocation activity within laths, as well as significant plastic accommodation in the vicinity of high angle block and packet boundaries. The observation of interface plasticity raises several questions regarding the role of thin inter-lath austenite films. Thus, accompanying transmission electron microscopy and synchrotron x-ray diffraction experiments are carried out to investigate the stability of these films to mechanical loading, and to discuss alternative boundary sliding mechanisms to explain the observed interface strain localization..
11. Jesbains Kaur, Noriyuki Kuwano, Khairur Rijal Jamaludin, Masatoshi Mitsuhara, Hikaru Saito, Satoshi Hata, Shuhei Suzuki, Hideto Miyake, Kazumasa Hiramatsu, Hiroyuki Fukuyama, Electron microscopy analysis of microstructure of postannealed aluminum nitride template, Applied Physics Express, 10.7567/APEX.9.065502, 9, 6, 2016.06, The microstructure of an AlN template after high-temperature annealing was investigated by transmission electron microscopy (TEM). The AlN template was prepared by depositing an AlN layer of about 200nm thickness on a sapphire (0001) substrate by metal-organic vapor phase epitaxy. The AlN template was annealed under (N2 + CO) atmosphere at 1500-1650 °C. TEM characterization was conducted to investigate the microstructural evolution, revealing that the postannealed AlN has a two-layer structure, the upper and lower layers of which exhibit Al and N polarities, respectively. It has been confirmed that postannealing is an effective treatment for controlling the microstructure..
12. K. Jesbains, N. Kuwano, K. R. Jamaludin, H. Miyake, K. Hiramatsu, S. Suzuki, Masatoshi Mitsuhara, Satoshi Hata, Y. Soejima, Reduction of dislocation density of aluminium nitride buffer layer grown on sapphire substrate, Journal of Mechanical Engineering and Sciences, 10.15282/jmes.10.1.2016.14.0182, 10, 1, 1908-1916, 2016.06, An aluminium nitride (AlN) buffer layer with 200 nm thickness was grown on (0001) sapphire substrate using the metal-organic vapour phase epitaxy (MOVPE) method in a low-pressure furnace, followed by a clean-up treatment of sapphire substrate at 1100°C. Thereafter, the AlN buffer layer was annealed at a high temperature in the range of 1500°C to 1700°C for 2 hours under the atmosphere of N2+CO. The objective of this research is to determine the microstructure changes with different annealing temperatures. Cross-sectional TEM has revealed that, after annealing at 1500°C, two types of defects remained in the AlN buffer layer: inverted cone shape domains and threading dislocations. The former domains were observed in an image taken with diffraction of g=0002, but not in an image with g=1010. The morphology and the diffraction condition for the image contrast strongly, suggesting that the domains are inversion domains. The threading dislocations were invisible in the image taken with the diffraction of g=0002, revealing that they were a-Type dislocations. However, after annealing at 1600oC, the inversion domains coalesced with each other to give a two-layer structure divided by a single inversion domain boundary at the centre of the AlN buffer layer. The density of threading dislocation was roughly estimated to be 5×109 cm-2 after annealing at 1500°C, and to be reduced to 5×108 cm-2 after annealing at 1600°C. These experimental results validate the fact that the annealing temperature around 1600°C is high enough to remove the defects by the diffusion process. Therefore, it was discovered that high temperature annealing is an effective treatment to alter the microstructure of AlN thin films and remove defects by the diffusion process. Annealing at high temperature is recommended to increase the emission efficiency for fabrication of optoelectronic devices..
13. M. Mitsuhara, T. Masuda, M. Nishida, T. Kunieda, H. Fujii, Precipitation Behavior During Aging in alpha Phase Titanium Supersaturated with Cu, METALLURGICAL AND MATERIALS TRANSACTIONS A-PHYSICAL METALLURGY AND MATERIALS SCIENCE, 10.1007/s11661-016-3344-7, 47A, 4, 1544-1553, 2016.04.
14. M. Matsuda, M. Mitsuhara, K. Takashima, M. Nishida, Antiphase Boundary-Like Structure of B19 Martensite in Ti-Ni-Pd Shape Memory Alloy, MATERIALS TRANSACTIONS, 10.2320/matertrans.MB201505, 57, 3, 250-256, 2016.03.
15. M. Mitsuhara, S. Yamasaki, M. Miake, Hideharu Nakashima, M. Nishida, J. Kusumoto, A. Kanaya, Creep strengthening by lath boundaries in 9Cr ferritic heat-resistant steel, PHILOSOPHICAL MAGAZINE LETTERS, 10.1080/09500839.2016.1154200, 96, 2, 76-83, 2016.02.
16. Y. Soejima, S. Motomura, M. Mitsuhara, T. Inamura, M. Nishida, In situ scanning electron microscopy study of the thermoelastic martensitic transformation in Ti-Ni shape memory alloy, ACTA MATERIALIA, 10.1016/j.actamat.2015.10.017, 103, 352-360, 2016.01.
17. S. Yamasaki, M. Mitsuhara, K. Ikeda, S. Hata, H. Nakashima, 3D visualization of dislocation arrangement using scanning electron microscope serial sectioning method, SCRIPTA MATERIALIA, 10.1016/j.scriptamat.2015.02.001, 101, 80-83, 2015.05.
18. Y. Miyajima, S. Komatsu, M. Mitsuhara, S. Hata, Hideharu Nakashima, N. Tsuji, Microstructural change due to isochronal annealing in severely plastic-deformed commercial purity aluminium, PHILOSOPHICAL MAGAZINE, 10.1080/14786435.2015.1021400, 95, 11, 1139-1149, 2015.04.
19. M. Matsuda, F. Tanaka, S. Tsurekawa, K. Takashima, M. Mitsuhara, M. Nishida, Novel long-period stacking-ordered structure of martensite in zirconium-cobalt-palladium alloys, PHILOSOPHICAL MAGAZINE LETTERS, 10.1080/09500839.2014.995739, 95, 1, 21-29, 2015.01.
20. N. Kuwano, Y. Ryu, M. Mitsuhara, C.H. Lin, S. Uchiyama, T. Maruyama, Y. Suzuki, S. Naritsuka, Behavior of defects in a-plane GaN films grown by low-angle-incidence microchannel epitaxy (LAIMCE), Journal of Crystal Growth, Vol.401, 409-413, 2014.07.
21. Shigeto Yamasaki, Masatoshi Mitsuhara, Ken-ichi Ikeda, Satoshi Hata, Hideharu Nakashima, Low-Stress Creep Deformation in Long-Term Aged Ferritic Heat-Resistant Steel , Materials Transactions, Vol.55, pp.842-849, 2014.05.
22. Keisuke Yamamoto, Masatoshi Mitsuhara, Keisuke Hiidome, Ryutaro Noguchi, Minoru Nishida, Dong Wang, and Hiroshi Nakashima, Role of an interlayer at a TiN/Ge contact to alleviate the intrinsic Fermi-level pinning position toward the conduction band edge, Applied Physics Letters, Vol.104, pp.132109-1-4, 2014.03.
23. M. Matsuda, R. Yamashita, S. Tsurekawa, K. Takashima, M. Mitsuhara, M. Nishida, Antiphase boundary-like structure of B19′ martensite via R-phase transformation in Ti–Ni–Fe alloy, Journal of Alloys and Compounds, Vol.586, pp.87-93, 2014.02.
24. B. Karbakhsh Ravari, M. Mitsuhara, S. Farjami, M. Nishida , Effect of thermal cycling on multistage martensitic transformation in aged Ti- 50.8 at.% Ni alloy , Materials Transactions, Vol.54, pp.2185-2188, 2013.12.
25. E. Okunishi, T. Kawai, M. Mitsuhara, S. Farjami, M. Itakura, M. Nishida, HAADF-STEM studies of athermal and isothermal ω-phase in β-Zr alloy, Journal of Alloys and Compounds, Vol.577S, pp.S713-S716, 2013.11.
26. H. Akamine, S. Farjami, M. Mitsuhara, M. Nishida, T. Fukuda and T. Kakeshita , Electron Microscopy Study of Preferential Variant Selection in CoPt Alloy Ordered under a Magnetic Field, MATERIALS TRANSACTIONS , Vol.54, pp.1715-1718, 2013.08.
27. Tomonori Tokunaga, Hideo Watanabe, Naoaki Yoshida, Takuya Nagasaka, Ryuta Kasada, Young-Ju Lee, Akihiko Kimura, Masayuki Tokitani, Masatoshi Mitsuhara, Tatsuya Hinoki, Hideharu Nakashima, Suguru Masuzaki, Takeshi Takabatake, Nobuyoshi Kuroki, Koichiro Ezato, Satoshi Suzuki, Masato Akiba, Development of high-grade VPS-tungsten coatings on F82H reduced activation steel, Journal of Nuclear Materials, Vol.442, pp.S287-S291, 2013.01.
28. R. Miyagawa, S. Yang, H. Miyake, K. Hiramatsu, T. Kuwahara, M. Mitsuhara, N. Kuwano, Microstructure of AlN grown on a nucleation layer on a sapphire substrate, Applied Physics Express, Vol.5, p.025501, 2012.01.
29. Jung Ho Kim, Sangjun Oh, Yoon-Uk Heo, Satoshi Hata, Hiroaki Kumakura, Akiyoshi Matsumoto, Masatoshi Mitsuhara, Seyong Choi, Yusuke Shimada, Minoru Maeda, Judith L MacManus-Driscoll, Shi Xue Dou, Microscopic role of carbon on MgB2 wire for critical current density comparable to NbTi, NPG Asia Materials, Vol.4, p.e3, 2012.01.
30. H. Idrissi, S. Turner, M. Mitsuhara, B. Wang, S. Hata , M. Coulombier, JP. Raskin, T. Pardoen, G. Van Tendeloo, D. Schryvers, Point defect clusters and dislocations in FIB irradiated nanocrystalline aluminium films: an electron tomography and aberration-corrected high resolution ADF-STEM study, Microscopy and Microanalysis, Vol.17, pp.983-990, 2011.11.
31. 光原昌寿、原田絵梨香、山崎重人、池田賢一、波多聰、中島英治、大塚智史、皆籐威二, 酸化物分散強化型9Crフェライト系耐熱鋼の3次元組織と高温強度, 可視化情報学会誌, Vol.31, pp.98-103, 2011.07.
32. S. Hata, H. Miyazaki, S. Miyazaki, M. Mitsuhara, M. Tanaka, K. Kaneko, K. Higashida, K. Ikeda, H. Nakashima, S. Matsumura, J. S. Barnard, J. H. Sharp, P. A. Midgley, High-angle triple-axis specimen holder for three-dimensional diffraction contrast imaging in transmission electron microscopy, Ultramicroscopy, Vol.111, pp.1168-1175, 2011.03.
33. U. D. Kulkarni, S. Hata, T. Nakano, M. Mitsuhara, K. Ikeda, H. Nakashima, Monte Carlo simulation of antiphase boundaries and growth of antiphase domains in Al5Ti3 phase in Al-rich gamma-TiAl intermetallics, Philosophical Magazine, Vol.91, pp.3068-3078, 2011.02.
34. U. D. Kulkarni, S. Hata, M. Mitsuhara, K. Ikeda, Ordering transformations in Ni75Mo15Mn10 alloy, Transactions of The Indian Institute of Metals, Vol.63, pp.819-822, 2010.10.
35. Y. Miyajima, S. Komatsu, M. Mitsuhara, S. Hata, H, Nakashima, N. Tsuji, Change in electrical resistivity of commercial purity aluminium severely plastic deformed, Philosophical Magazine, Vol.90, pp.4475-4488, 2010.09.
36. Y. Miyajima, S. Komatsu, M. Mitsuhara, S. Hata, H, Nakashima, N. Tsuji, Quantification of Internal Dislocation Density Using Scanning Transmission Electron Microscopy
in Ultrafine Grained Pure Aluminum Fabricated by Severe Plastic Deformation, Materials Science and Engineering A, Vol.528, pp.776-779, 2010.09.
37. M. Mitsuhara, S. Hata, K. Ikeda, H. Nakashima, M. Tanaka, K. Higashida, Three-dimensional evaluation of dislocation arrangement
using electron tomography in austenitic steel, Proceedings of the 31st Ris? International Symposium on Materials Science, pp.353-360, 2010.08.
38. H. Matsuo, M. Mitsuhara, K. Ikeda, S. Hata, H. Nakashima, Optimal imaging conditions for dislocation tomography using scanning transmission electron microscopy, International Journal of Fatigue, Vol.32, pp.592-598, 2010.01.
39. S. Sadamatsu, M. Tanaka, K. Higashida, K. Kaneko, M. Mitsuhara, S. Hata, M. Honda, Crack tip dislocations observed by combining scanning trasmission electron microscopy and computed tomography, Advanced Materials Research, Vol.89-91, pp.473-478, 2010.01.
40. Y. Yahiro, M. Mitsuhara, K Tokunaga, N. Yoshida, T. Hirai, K, Ezato, S. Suzuki, M .Akiba, H. Nakashima, Characterization of thick plasma spray tungsten coating on ferritic/martensitic steel F82H for high heat flux armor, Journal of Nuclear Materials, Vol.386-388, pp.784-788, 2009.01.
41. K. Yamada, M. Mitsuhara, S. Hata, Y. Miyanaga, R. Teranishi, N. Mori, M. Mukaida, K. Kaneko, Three-dimensional observation of microstructures in Y123 films fabricated by TFA-MOD method, Physica C, Vol.469, pp.1446-1449, 2009.01.
42. M. Tanaka, M. Honda, M. Mitsuhara, S. Hata, K. Kaneko, K. Higashida, Three-dimensional analyses of crack tip dislocations observed by electron tomography, Korean Journal of Microscopy, Korean Journal of Microscopy, Vol.38 Supplement, pp.221-222, 2008.11.
43. M. Mitsuhara, M. Tanaka, K. Ikeda, S. Hata, H. Nakashima, Three-dimensional imaging of dislocations in steel using STEM tomography, Korean Journal of Microscopy, Vol.38 Supplement, pp.223-224, 2008.11.
44. T. Isobe, M. Mitsuhara, K. Ikeda, S. Hata, H. Nakashima, Y. Todaka, M. Umemoto, Electron Microscopy Observation of Pure Copper Deformed by High Pressure Torsion, Proc. International Symposium on Giant Straining Process for Advanced Materials (GSAM-2008), pp.83-84, 2008.11.
45. M. Tanaka, M. Honda, M. Mitsuhara, S. Hata, K. Kaneko, K. Higashida, Three-dimensional observation of dislocations by electron tomography in a silicon crystal, Materials Transactions, Vol.49, pp.1953-1956, 2008.08.
46. M. Tanaka, K. Higashida, K. Kaneko, S. Hata, M. Mitsuhara, Crack tip dislocations revealed by electron tomography in silicon single crystal, Scripta Materialia, Vol.59, pp.901-904, 2008.07.
47. M. Mitsuhara, Y. Yoshida, K. Ikeda, H. Nakashima and T. Wakai, Effects of Addition of V and Nb on Ω in High Cr Ferritic Steels, Materials Science Forum, Vol.561-565, pp.95-98, 2007.11.
48. M. Mitsuhara, Y. Yoshida, K. Ikeda, H. Nakashima and T. Wakai, Mechanism of Creep Strengthening in High Cr Ferritic Heat Resistant Steel added V and Nb, Proc. the 1st International Symposium on Steel Science (IS3-2007), pp.227-230, 2007.05.
49. M. Mitsuhara, Y. Yoshida, K. Ikeda, H. Nakashima and T. Wakai, Effect of Vanadium and Niobium on Creep Strength in 10% Chromium Steel Analyzed by STEM-EDS, Proc. CREEP8, Eighth International Conference on Creep and Fatigue at Elevated Temperatures, CREEP 2007-26746, pp.1-5, 2007.05.
50. M. Mitsuhara, D. Terada and H. Nakashima, Life Assessment of Heat Resistant Steels using the Omega Method, Proc. FAILURES 2006, pp.287-297, 2006.02.
51. Yuki Uchida, Sho Nakandakari, Kenji Kawahara, Shigeto Yamasaki, Masatoshi Mitsuhara, Hiroki Ago, Controlled Growth of Large-Area Uniform Multilayer Hexagonal Boron Nitride as an Effective 2D Substrate, ACS Nano.
Presentations
1. W. Li, S. Yamasaki, M. Mitsuhara, H. Nakashima, In-situ EBSD characterization of deformation behavior of primary alpha phase in Ti-6Al-4V, The 14th World Conference on Titanium,, 2019.06.
2. Masatoshi Mitsuhara, Takanori Ito, Shigeto Yamasaki, Hideharu Nakashima, Minoru Nishida, Mitsuharru Yonemura, Creep deformation and strengthening mechanism in newly developed Ni-20Cr-15Co-1Ti-2Al-8W polycrystalline heat-resistant alloy, 18th International Conference on the Strength of Materials (ICSMA 18), 2018.07.
3. H. Nakasima, S. Yamasaki, M. Mitsuhara, Creep strength of new ferritic Fe-N steel for fossil power plant, The 3rd Japan-Russia International Seminar on Advanced Materials, 2017.09.
4. S. Yamasaki, M. Mitsuhara and H. Nakashima, Development of new ferritic heat-resistant steel with high nitrogen and tungsten addition, IU-MRS (International union of Materials Research Society) 2017, 2017.08.
5. Yoshikazu Todaka, Motohiro Horii, Shion Tachibana, Nozomu Adachi, Masatoshi Mitsuhara, Minoru Nishida, Tribological behavior under lubricant in heavy plastic deformed steels with high-density of lattice defects, Frontiers in Materials Processing Applications, Research and Technology, FiMPART'17, 2017.07.
6. Yoshinori Shiihara, Yoshitaka Umeno, Masatoshi Mitsuhara, Minoru Nishida, Yoshikazu Todaka, Atomic-level interaction between lubricant and SPD-processed metallic surface: first principles, molecular dynamics, and coarse-grained molecular dynamics approaches, Frontiers in Materials Processing Applications, Research and Technology, FiMPART'17, 2017.07.
7. Mitsuhiro Matsuda, Ryo Matsuoka, Kazuki Takashima, Masatoshi Mitsuhara, Minoru Nishida, Novel long-period stacking-ordered structure of martensite in zirconium and hafnium-based alloys, International Conference on Martensitic Transformations, ICOMAT2017, 2017.07.
8. Sho Nakandakari, Kenji Kawahara, Yuki Uchida, Shigeto Yamasaki, Masatoshi Mitsuhara, Hiroki Ago, Growth of large-area and uniform multilayer hexagonal boron nitride as an ideal 2D insulator, The 52nd Fullerenes-Nanotubes-Graphene General Symposium, 2017.03.
9. M. Nishida, Y. Soejima, T. Miyoshi, M. Mitsuhara, T. Inamura, Dynamic Visualization of Thermoelastic Martensitic Trans- formation by In-Situ SEM Observation in Various Shape Memory Alloys, 9th Pacific Rim International Conference on Advanced Materials and Processing (PRICM2016), 2016.08.
10. T. Miyoshi, Y. Soejima, M. Mitsuhara, M. Nishida, T. Inamura, In-Situ SEM Observation of Nucleation and Growth during Thermoelastic Martensitic Transformation in Various Shape Memory Alloys, 9th Pacific Rim International Conference on Advanced Materials and Processing (PRICM2016), 2016.08.
11. S. Komatsu, Y. Soejima, S. Farjami, M. Mitsuhara, M. Nishida, K. Yamauchi, Production of Ti-50.0 at.% Ni Superelastic Wire for IVR Device, 9th Pacific Rim International Conference on Advanced Materials and Processing (PRICM2016), 2016.08.
12. M. Mitsuhara, T. Okano, T. Ito, M. Nishida, Coarsening behavior of intergranular M23C6 carbide in high Cr ferritic heat-resistant steel, 9th Pacific Rim International Conference on Advanced Materials and Processing (PRICM2016), 2016.08.
13. S. Yamasaki, M. Mitsuhara, S. Hata, H. Nakashima, Three-Dimensional Observation of Dislocation Arrange- ment by Serial Sectioning of SEM-ECCI , 9th Pacific Rim International Conference on Advanced Materials and Processing (PRICM2016), 2016.08.
14. T. Ito, S. Yamasaki, M. Mitsuhara, H. Nakashima, M. Nishida, M. Yonemura, Creep Property and Microstructural Evolution of Grain Boundary Precipitation Strengthening Ni-Based Heat-Resistant Alloy , 9th Pacific Rim International Conference on Advanced Materials and Processing (PRICM2016), 2016.08.
15. D. Tyutyunnikov, M. Mitsuhara, P. A. van Aken, C. T. Koch, Two-dimensional misorientation mapping by rocking dark-field transmission electron microscopy, Microscopy Conference 2015, 2015.09.
16. M. Mitsuhara, S. Akada, S. Yamasaki, H. Nakashima, M. Nishida, Y. Hasegawa, Microstructural evolution of welded joint during creep in high Cr ferritic heat-resistant steel, Advanced High-Temperature Materials Technology for Sustainable and Reliable Power Engineering, 123HiMAT-2015, 2015.07.
17. T. Ito, S. Hirata, M. Mitsuhara, M. Nishida, Relationship between recrystalllization behavior and creep property in high Mn austenitic stainless steels with Mo, Advanced High-Temperature Materials Technology for Sustainable and Reliable Power Engineering, 123HiMAT-2015, 2015.07.
18. T. Okano, T. Ito, M. Mitsuhara, M. Nishida, Effect of grain boundary character on M23C6 carbide distribution in high Cr herritic heat-resistant steel, Advanced High-Temperature Materials Technology for Sustainable and Reliable Power Engineering, 123HiMAT-2015, 2015.07.
19. S. Yamasaki, M. Mitsuhara, S. Hata, H. Nakashima, Change in major creep reinforcer of ferritic heat-resistant steel depending on applied stress, Advanced High-Temperature Materials Technology for Sustainable and Reliable Power Engineering, 123HiMAT-2015, 2015.07.
20. M. Mitsuhara, M. Miake, S. Yamasaki, M. Nishida, J. Kusumoto, A. Kanaya, Lath boundary strengthening mechanism in high Cr ferritic heat-resistant steel, 13th International Conference on Creep and Fracture of Engineering Materials and Structures, CREEP2015, 2015.06.
21. T. Ito, S. Hirata, M. Mitsuhara, M. Nishida, Effect of Mo addition on recrystallization behavior and creep properties in high Mn austenitic stainless steels, 13th International Conference on Creep and Fracture of Engineering Materials and Structures, CREEP2015, 2015.06.
22. S. Yamasaki, M. Mitsuhara, K. Ikeda, S. Hata, H. Nakashima, Transition of creep mechanism and reinforcing microstructure in grade P92 ferritic heat-resistant steel, 13th International Conference on Creep and Fracture of Engineering Materials and Structures, CREEP2015, 2015.06.
23. 15日, 口頭発表.
24. 15日, 口頭発表.
25. 19日、口頭発表.
26. ポスター発表.
27. ポスター発表、努力賞.
28. 18日、口頭発表.
29. 18日、口頭発表.
30. M. Mitsuahra, Nano/microstructure and creep strength in ferritic heat resistant steel, 頭脳循環Workshop, 2015.03.
31. N. Kuwano, J. Kaur, R. Akiyoshi, K. Hayashi, Y. Soejima, M. Mitsuhara, S. Suzuki, H. Miyake, K. Hiramatsu, Dependence of microstructures in MOVPE-AlN on annealing temperature of sapphire substrate, International Symposium on Semiconductor Materials and Devices (ISSMD-3), 2015.02.
32. 口頭・招待講演.
33. H. Nakashima, M. Mitsuhara, High temperature deformation dynamics in crystalline materials, The 4th International Symposium on Steel Science (ISSS 2014), 2014.11.
34. M. Nishida, Y. Soejima, M. Mitsuhara, T. Inamura, Multiscale characterizations of martensitic transformation in Ti-Ni shape memory alloys, 18th International Microscopy Congress, IMC 2014, 2014.09.
35. M. Mitsuhara, T. Nagase, T. Masuda, M. Nishida, T. Kunieda, H. Fujii, Microstructural Evolution in Ti-Fe-O-N Alloys During Heating at Intermediate Temperature, 18th International Microscopy Congress, IMC 2014, 2014.09.
36. M. Mitsuhara, K. Fujita, M. Yasunaga, H. Yoshida, M. Nishida, Grain Boundary Control and Grain Refinement of Ti-Ni Based Shape Memory Alloys with Light Plastic Deformation, International Conference on Martensitic Transformations 2014, ICOMAT 2014, 2014.07.
37. M. Nishida, Y. Soejima, S. Shibuta, S. Farjami, M. Mitsuhara, T. Inamura, Multiscale Visualization of Self-Accommodation Morphology of B19’ Martensite in Ti-Ni Shape Memory Alloy, International Conference on Martensitic Transformations 2014, ICOMAT 2014, 2014.07.
38. Y. Soejima, S. Farjami, M. Mitsuhara, T. Inamura, M. Nishida, Compositional Dependence of Self-Accommodation Morphology of B19' Martensite in Ti-Ni Shape Memory Alloys, International Conference on Martensitic Transformations 2014, ICOMAT 2014, 2014.07.
39. M. Mitsuhara, An overview of micro/nano-structure and the creep property relationship of high-Cr heat resistant steels, Virginia Tech MSE Seminar, 2014.02.
40. M. Mitsuhara, M. Miake, S. Yamasaki, S. Hata, H. Nakashima, M. Nishida, J. Kusumoto, A. Kanaya, Interaction between Dislocations and Lath Boundaries during High Temperature Deformation in 9Cr Heat-Resistant Steel, TMS 2014, 143rd Annual Meeting & Exhibition, 2014.02.
41. Masatoshi Mitsuhara, Masaki Miake, Shigeto Yamasaki, Hideharu Nakashima, Ninoru Nishida, Jun-ichi Kusumoto, Akihiro Kanaya, Effect of Lath Boundary on Creep Strengthening in 9Cr Hear-Resistant Steel, The 8th International Conference on Processing & Manufacturing of Advanced Materials (THERMEC’2013), 2013.12.
42. Sahar Farjami, Yuri Tanaka, Masatoshi Mitsuhara, Masaru Itakura, Minoru Nishida, Takashi Fukuda, Tomoyuki Kakeshita, Microstructure Formation through Disorder-Order Transformation in Ferromagnetic Alloys under Magnetic Field, IUMRS-ICA2013, 2013.12.
43. H. Akamine, Y. Tanaka, S. Farjami, M. Mitsuhara, M. Itakura, M. Nishida, T. Fukuda, T. Kakeshita, Electron microscopy study of magnetic field-induced cariant selection during disorder-order transformation in CoPt alloy, Intermetallics 2013, 2013.09.
44. S. Farjami, Y. Tanaka, M. Mitsuhara, M. Itakura, M. Nishida, T. Fukuda, T. Kakeshita, HAADF-STEM studies of L10-type Fe-Pd alloy ordered under magnetic field, Intermetallics 2013, 2013.09.
45. Satoshi Hata, Ryutaro Akiyoshi, Keisuke Ogata, Masatoshi Mitsuhara, Ken-ichi Ikeda, Hideharu Nakashima, Syo Matsumura, Minoru Doi, Fitting tomography-based transmission electron microscopy (TEM) to structural material problems: toward effective 3D TEM imaging and analysis, NIMS Conference 2012, Structural Materials Science and Strategy for Sustainability - Back to the Basics -, 2012.06.
46. Yuri Tanaka, Sahar Farjami, Masatoshi Mitsuhara, Masaru Itakura, Minoru Nishida, Takashi Fukuda, Tomoyuki Kakeshida, TEM studies of disorder-order transformation in Fe45Pd55 alloy under magnetic field, NIMS Conference 2012, Structural Materials Science and Strategy for Sustainability - Back to the Basics -, 2012.06.
47. Shun-ichi Motomura, Masatoshi Mitsuhara, Masaru Itakura, Minoru Nishida, Noriyuki Kuwano, Detection of local elastic strain in pearlite steel by using a SEM-AsB image, NIMS Conference 2012, Structural Materials Science and Strategy for Sustainability - Back to the Basics -, 2012.06.
48. S. Yamasaki, M. Mitsuhara, K. Ikeda, S. Hata, H. Nakashima, Creep behavior at ultra-low strain rate in 9% Cr steel studied by helical spring creep test, 12th International Conference on Creep and Fracture of Engineering Materials, CREEP2012, 2012.05.
49. M. Mitsuhara, E. Harada, K. Ikeda, S. Hata, H. Nakashima, S. Otsuka, T. Kaito, M. Inoue, Evaluation of creep strength based on nano-oxide distribution in ODS-9Cr ferritic steels, 12th International Conference on Creep and Fracture of Engineering Materials, CREEP2012, 2012.05.
50. M. Nishida, H. Kawano, E. Okunishi, M. Mitsuhara, T. Inamura, M. Itakura, N. Kuwano, Novel electron microscopy studies of self-accommodation morphology in B19' Ti-Ni martensite, International Conference on Martensitic Transformations, ICOMAT2011, 2011.09.
51. E. Okunishi, T. Kawai, M. Mitsuhara, T. Hara, M. Nishida, HAADF-STEM studies of athermal and isothermal ω-phases in β-Ti and Zr alloys, International Conference on Martensitic Transformations, ICOMAT2011, 2011.09.
52. M. Mitsuhara, T. Kawai, S. Hata, M. Itakura, H. Nakashima, M. Nishida, Three-dimensional morphology of ω-phase in β-Ti and Zr alloys, International Conference on Martensitic Transformations, ICOMAT2011, 2011.09.
53. M. Mitsuhara, H. Kawano, T. Kawai, E. Okunishi, S. Hata, M. Nishida, T. Inamura, Application of novel SEM, TEM and STEM techniques for multi-scale analysis in TiNi and β-Ti alloy, International Conference on Martensitic Transformations, ICOMAT2011, 2011.09.
54. M. Mitsuhara, S. Hata, K. Ikeda, H. Nakashima, Three-dimensional analysis of dislocations in metals using electron tomography, International Conference on Electron Nanoscopy (EM 50) & XXXII Annual Meeting of EMSI, 2011.07.
55. S. Hata, H. Miyazaki, S. Miyazaki, M. Mitsuhara, S. Matsumura, K. Kimoto, K. Ikeda, H. Nakashima, High-angle triple-axis specimen holders developed for electron tomography, International Conference on Electron Nanoscopy (EM 51) & XXXII Annual Meeting of EMSI, 2011.07.
56. M. Mitsuhara, S. Hata, K. Ikeda, H. Nakashima, M. Tanaka, K. Higashida, Three-dimensional visualization and quantitative analysis of dislocation microstructure using electron tomography in an austenitic steel, The 12th Frontiers of Electron Microscopy in Materials Science (FEMMS2009), 2009.09.
57. M. Mitsuhara, M. Tanaka, S. Hata, K. Ikeda, H. Nakashima, K. Higashida, Optimal condition for STEM tomography of dislocations in metallic materials, Asia-Pacific Congress on Electron Tomography (APCET), 2009.02.
Membership in Academic Society
  • TMS; The Minerals, Metals and Materials Society
  • The Japanese Society of Applied Physics
  • The Japanese Society of Microscopy
  • The Society of Materials Science
  • The Japan Institute of Metals
  • The Iron and Steel Institute of Japan