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

Abstract

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.

Journal

• ISIJ International

  ISIJ International 62 (10), 2036-2042, 2022-10-15

  The Iron and Steel Institute of Japan

Keywords

• medium-Mn steel
• Lüders deformation
• local plasticity
• martensitic transformation
• neutron diffraction

Details

• CRID: 1390293799270164224
• NII Article ID: 130008154264
• DOI: 10.2355/isijinternational.isijint-2021-510
• ISSN: 13475460
• ISSN: 09151559
• Web Site: https://www.jstage.jst.go.jp/article/isijinternational/62/10/62_ISIJINT-2021-510/_pdf
• Text Lang: en
• Data Source:
  • JaLC
  • Crossref
  • CiNii Articles
  • KAKEN
• Abstract License Flag: Disallowed