Microstructure and Plasticity Evolution During Lüders Deformation in an Fe-5Mn-0.1C Medium-Mn Steel

  • Koyama Motomichi
    Institute for Materials Research, Tohoku University Graduate School of Engineering, Tohoku University Elements Strategy Initiative for Structural Materials (ESISM), Kyoto University
  • Yamashita Takayuki
    Joining and Welding Research Institute, Osaka University
  • Morooka Satoshi
    Materials Science Research Center, Japan Atomic Energy Agency
  • Sawaguchi Takahiro
    National Institute for Materials Science
  • Yang Zhipeng
    Institute for Materials Research, Tohoku University Graduate School of Engineering, Tohoku University
  • Hojo Tomohiko
    Institute for Materials Research, Tohoku University Graduate School of Engineering, Tohoku University
  • Kawasaki Takuro
    J-PARC Center, Japan Atomic Energy Agency
  • Harjo Stefanus
    J-PARC Center, Japan Atomic Energy Agency

Bibliographic Information

Other Title
  • Fe-5Mn-0.1C中Mn鋼におけるリューダース変形中の微視組織および塑性の発達
  • Fe-5Mn-0.1C チュウ Mnコウ ニ オケル リューダース ヘンケイ チュウ ノ ビシ ソシキ オヨビ ソセイ ノ ハッタツ

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Abstract

<p>The local plasticity and associated microstructure evolution in Fe-5Mn-0.1C medium-Mn steel (wt.%) were investigated in this study. Specifically, the micro-deformation mechanism during Lüders banding was characterized based on multi-scale electron backscatter diffraction measurements and electron channeling contrast imaging. Similar to other medium-Mn steels, the Fe-5Mn-0.1C steel showed discontinuous macroscopic deformation, preferential plastic deformation in austenite, and deformation-induced martensitic transformation during Lüders deformation. Hexagonal close-packed martensite was also observed as an intermediate phase. Furthermore, an in-situ neutron diffraction experiment revealed that the pre-existing body-centered cubic phase, which was mainly ferrite, was a minor deformation path, although ferrite was the major constituent phase.</p>

Journal

  • Tetsu-to-Hagane

    Tetsu-to-Hagane 110 (3), 197-204, 2024-02-15

    The Iron and Steel Institute of Japan

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