Local Plastic Deformation of Kink Band Opposing External Stress in Mg–Zn–Y Alloy

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  • Matsumura Ryutaro
    Department of Material Science and Engineering, Tokyo Institute of Technology
  • Ueda Yuri
    Department of Material Science and Engineering, Tokyo Institute of Technology
  • Hagihara Koji
    Department of Physical Science and Engineering, Nagoya Institute of Technology
  • Shinohara Yuri
    Department of Mechanical and Intelligent Systems Engineering, The University of Electro-Communications
  • Inamura Tomonari
    Laboratory for Materials and Structures, Institute of Innovative Research, Tokyo Institute of Technology Laboratory for Future Interdisciplinary Research of Science and Technology, Institute of Innovative Research, Tokyo Institute of Technology

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<p>In order to determine a factor of kink strengthening, spatial distribution of crystal rotation, kink interface rotation and plastic strain in deformed kink bands was investigated. Fine mesh was drawn on kink microstructure using focused-ion beam to map the plastic strain caused by the further deformation. Results clearly showed the existence of local deformation in the opposite direction of the external stress. This opposing plastic deformation was explained well the observed crystal rotation and rotation of the kink interface, provided that the rank-1 connection was maintained during deformation. The constraint between connected kink bands was suggested to be the origin of this opposite deformation and one of the factors leading to kink strengthening.</p>

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  • MATERIALS TRANSACTIONS

    MATERIALS TRANSACTIONS 65 (1), 101-104, 2024-01-01

    公益社団法人 日本金属学会

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