Study at TCU


Name KUMAGAI Masayoshi
Official Title Associate Professor
Affiliation Department of Mechanical Systems Engineering, Fuculty of Science and Engineering
Profile He received his PhD due to research to characterize microstructural features in steels by using X-ray diffraction line profile analysis. His research interests are mechanical properties (yield stress, hardness, fatigue, etc.) based on the nanoscale behavior of materials such as lattice defects. In particular, the characterizations using X-ray/Neutron diffraction and its advancement are great concerns. The experimtnts are also carried out at large accelerator facilities (Spring-8, J-PARC).
Research Field(Keyword & Summary)
  1. Engineering materials

    Understanding the mechanical behaviour, e.g. yielding, deformation and fracture for engineering materials

  2. Material characterization

    Characterization of mechanical performance and microstructure, in particular using X-ray / neutron diffraction

Representative Papers
  1. In situ diffraction characterization on microstructure evolution in austenitic stainless steel during cyclic plastic deformation and its relation to the mechanical response, Materials Science and Engineering A, 820, 141582 (2021) |
  2. Depth-profiling of residual stress and microstructure for austenitic stainless steel surface treated by cavitation, shot and laser peening, Materials Science and Engineering A, 813, 141037 (2021) |
  3. Inhomogeneous strain and recrystallisation of a shot-peened Inconel 625 alloy after annealing, Materials Science and Technology, 35, 1856 (2019) |
  4. Prospect for application of compact accelerator-based neutron source to neutron engineering diffraction, Nuclear Instruments and Methods in Physics Research Section A, 833, 61 (2016) |
  5. Strengthening of biomedical Ni-free Co–Cr–Mo alloy by multipass “low-strain-per-pass” thermomechanical processing, Acta Biomaterialia, 28, 215 (2015) |
  6. Residual stress analysis of cold-drawn pearlite steel wire using white synchrotron radiation, ISIJ International, 55, 1489 (2015) |
  7. X-Ray Line Profile Study on Shot/Laser-Peened Stainless Steel, Advanced Materials Research, 996, 39 (2014) |
  8. Workhardening and the microstructural characteristics of shot- and laser-peened austenitic stainless steel, Materials Science and Engineering A, 608, 21 (2014) |
  9. Microstructural Features of Cold-Rolled Carbon Steel Evaluated by X-ray Diffraction Line Profile Analysis and Their Correlation with Mechanical Properties, ISIJ International, 54, 206 (2014) |
  10. X-ray diffraction study on microstructures of shot/laser-peened AISI316 stainless steel, Journal of Nuclear Materials 443, 107 (2013) |
Grant-in-Aid for Scientific Research Support: Japan Society for Promotion of Science (JSPS)
Research Grants/Projects including subsidies, donations, grants, etc. Development of fatigue damage evaluation in the early stage using X-ray diffraction
Japan Society for the Promotion of Science, 19K14848, Apr 2019 - Mar 2022.
Characterization of microscopic multiple strain in iron based alloys with large elastic anisotropy
Japan Society for the Promotion of Science, 17H03422, Apr 2017 - Mar 2021.
Recruitment of research assistant(s) No
Affiliated academic society (Membership type) The Japan Society of Materials Science (Member)
The Japan Society of Mechanical Engineers (Member)
The Iron and Steel Institute of Japan (Member)
Education Field (Undergraduate level) Mechanical Engineering/Materials Science
Education Field (Graduate level) Mechanical Engineering/Materials Science