Grain-boundary nucleation in deformation-induced martensitic transformation: In-situ TEM observation vs. MD simulation

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  • Konishi Kazumi
    Graduate School of Natural Science and Technology, Kanazawa Univ.
  • Punyafu Jesada
    Department of Applied Science for Electronics and Materials, Kyushu Univ
  • Murayama Mitsuhiro
    Department of Materials Science and Engineering, Virginia Tech Institute for Materials Chemistry and Engineering, Kyushu Univ
  • Tsuji Nobuhiro
    Department of Materials Science and Engineering, Kyoto Univ
  • Niiyama Tomoaki
    Institute of Science and Engineering, Kanazawa Univ.
  • Shimokawa Tomotsugu
    Institute of Science and Engineering, Kanazawa Univ.

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Other Title
  • 変形誘起マルテンサイト変態の粒界核生成：その場TEM観察とMDの比較

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<p>Deformation-induced martensitic transformation (DIMT) can achieve both high strength and high ductility in steel materials, but the nucleation mechanism has not been clarified yet. In this study, an atomic model of the crystal orientation of materials in which DIMT was observed by in-situ transmission electron microscopy (TEM) was created and analyzed by molecular dynamics simulation to investigate the generality of the obtained dominant factors of nucleation in our previous molecular dynamics (MD) studies. As a result, it was confirmed that the nucleation sites obtained by MD simulation generally corresponded to those observed in in-situ TEM. It was also confirmed that the transformation strain is an important dominant factor in variant selection, which is consistent with the results of the previous MD studies.</p>

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