Research Clusters

Advanced Structural Materials

The mechanical properties of materials are dominated by their microstructures such as grain size, precipitates, phase boundary, grain boundary, etc. In our research group, we aim to clarify the mechanical properties at microscopic level, including tensile properties, fracture and fatigue properties, using the micromechanical testing technology that we have developed. Furthermore, in conjunction with crystal plasticity finite element simulation, we aim to predict the mechanical properties of bulk materials based on those at microscopic scale. The results obtained in this research will contribute for developing toughening design of advanced materials.

Advanced Structural Materials

Cluster members

  • Japan
    Yoji MINE
    Professor, Faculty of Advanced Science and Technology, Kumamoto University
  • Japan
    Kazuki TAKASHIMA
    Distinguished Professor, International Research Organization for Advanced Science and Technology (IROAST)
  • Japan
    Kwangsik KWAK
    Assistant Professor, Faculty of Advanced Science and Technology, Kumamoto University
  • China
    Yufeng ZHENG Website
    Distinguished Professor, IROAST, Kumamoto University/ Professor, Department of Materials Science and Engineering, College of Engineering, Peking University/ IROAST Distinguished Professor
  • UK
    Paul BOWEN Website
    Professor, School of Metallurgy and Materials, University of Birmingham /IROAST Visiting Professor
  • UK
    Yu-Lung CHIU
    Senior Lecturer, School of Metallurgy and Materials, University of Birmingham
  • UK
    Hiroto KITAGUCHI 
    Senior Research Fellow, School of Metallurgy and Materials, University of Birmingham
  • Germany
    Martin DIENWIEBEL Website
    Heisenberg-Professor, Applied Nanotribology, Karlsruhe Institute for Technology (KIT)/ IROAST Visiting Professor
  • Australia
    Shirley SHEN
    Principal Research Scientist, CSIRO/ IROAST Visiting Professor



K. Kwak, Y. Mine, S. Morito, T. Ohmura, K. Takashima:
Correlation between strength and hardness for substructures of lath martensite in low- and medium-carbon steels
Materials Science and Engineering: A, 856 (2022) 144007.

Y. Tampa, K. Takagi, S. Ueki, M. Ohta, Y. Mine, K. Takashima:
Comparative Study of Shear Fracture between Fe-based Amorphous and Ultrafine-grained Alloys Using Micro-tensile Testing
ISIJ International, Volume 62, pp. 1741-1749 (2022)

K. Kwak, Y. Okamura, Y. Mine, K. Takashima, S. Koseki, S. Ando, K. Kuwabara:
Micro-mechanical characterisation of slip behaviour and precipitation strengthening in CoCrFeNiTiMo alloy additively manufactured by laser powder bed fusion
Materials Science and Engineering: A, 840 (2022) 142970.


  • Elucidation of plastic deformation mechanism of additively manufactured Ti-6Al-4V alloys using trans-length scale mechanical characterization, KAKENHI Grant-in-Aid for Early-Career Scientists 2021-2024 (Continuing).
  • Development of local strengthening of micro-mechanical components using martensitic transformation induced by focused ion beam irradiation, KAKENHI Grant-in-Aid for Challenging Exploratory Research 2021-2022 (Continuing).
  • Elucidation of fatigue crack growth mechanism of martensite steels using micro-mechanical testing technique and application to fatigue strengthening design, KAKENHI Grant-in-Aid for Scientific Research (A) 2020-2024 (Continuing).


  • The international workshop between CSIRO and KU (online) in July, 2022
  • Progress of International collaboration between the University of Birmingham (Professor Bowen, Dr. Chiu, and Dr. Kitaguchi) and Kumamoto University
  • Start of International collaboration between Karlsruhe Institute for Technology and Kumamoto Unviersity


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