Research Units

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

Unit members

  • Japan
    Unit Coordinator
    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
    Feeney Professor of Metallurgy, 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



K. Kwak, T. Mayama, Y. Mine, K. Ohishi, T. Ueno, K. Takashima, Multiscale mechanical characterization of 601 nickel-based superalloy fabricated using wire-arc additive manufacturing, Mater. Sci. Eng. A 836 (2022) 142734. 

D. Bayoumy, K. Kwak, T. Boll, S. Dietrich, D. Schliephake, J. Huang, J. Yi, K. Takashima, X. Wu, Y. Zhu, A. Huang, Origin of non-uniform plasticity in a high-strength Al-Mn-Sc based alloy produced by laser powder bed fusion, J. Mater. Sci. Technol. 103 (2022) 121–133.

S. Ueki, K. Koga, Y. Mine, K. Takashima, Crystallographic characterisation of hydrogen-induced twin boundary separation in type 304 stainless steel using micro-tensile testing, Tetsu-to-Hagané 108 (2022) 97–106 (in Japanese).

K. Takagi, E. Hashamova, M. Dienwiebel, Y. Mine, K. Takashima, Correlation of wear behaviour and microstructural evolution in Mg-Zn-Y alloys with long-period stacking ordered phase, Wear 482–483 (2021) 203983.

S. Ueki, Y. Mine, X. Lu, Y.L. Chiu, P. Bowen, K. Takashima, Effect of geometric lath orientation on fatigue crack propagation via out-of-plane dislocation glide in martensitic steel, Scr. Mater. 203 (2021) 114045.

A. Matsushita, Y. Mine, K. Takashima, Enhanced resistance to fatigue crack propagation in metastable austenitic stainless steel by nanotwin bundles, Scr. Mater. 201 (2021) 113976.

A. Matsushita, S. Ueki, Y. Mine, K. Takashima, Comparative study of microstructure-sensitive fatigue crack propagation in coarse- and fine-grained microstructures between stable and metastable austenitic stainless steels using miniature specimen, ISIJ Int. 61 (2021) 1688–1697.

Y. Shimada, K. Harada, Y. Mine, M. Yoshimura, K. Takashima, Low-temperature micro-fracture toughness testing of grain boundaries in steel, Mater. Trans. 62 (2021) 570–573.

J. Wu, S. Si, K. Takagi, T. Li, Y. Mine, K. Takashima, Y. L. Chiu: “Study of basal <a> and pyramidal <c + a> slips in Mg-Y alloys using micro-pillar compression”, Phil. Mag., 100 (2020) pp. 1454-1475.

Ueki, R. Oura, Y. Mine, K. Takashima: “Micro-mechanical characterisation of hydrogen embrittlement in nano-twinned metastable austenitic stainless steel”, Int. J. Hydrogen Energy, 45 (2020) pp. 27950-27957.



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 (New).

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 (New).

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).

Exploration of guiding principles for toughening design of hydrogen-resistant materials using multi-scale mechanical testing, KAKENHI Grant-in-Aid for Scientific Research (B) 2019-2021 (Continuing).


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