Stress and Plastic Strain Partitioning Behaviors and Those Contributions to Martensitic Transformation of Retained Austenite in Medium Manganese and Transformation-Induced Plasticity-Aided Bainitic Ferrite Steels
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- Hojo Tomohiko
- Department of Mechanical Engineering and Intelligent Systems, Faculty of Engineering, Tohoku Gakuin University
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- Koyama Motomichi
- Institute for Materials Research, Tohoku University
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- Kumai Bakuya
- Institute for Materials Research, Tohoku University Graduate School of Engineering, Tohoku University
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- Zhou Yutao
- Institute for Materials Research, Tohoku University Graduate School of Engineering, Tohoku University
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- Shibayama Yuki
- Japan Atomic Energy Agency (JAEA)
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- Shiro Ayumi
- National Institutes for Quantum and Radiological Science and Technology (QST)
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- Shobu Takahisa
- Japan Atomic Energy Agency (JAEA)
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- Saitoh Hiroyuki
- National Institutes for Quantum and Radiological Science and Technology (QST)
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- Ajito Saya
- Institute for Materials Research, Tohoku University
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- Akiyama Eiji
- Institute for Materials Research, Tohoku University
Bibliographic Information
- Other Title
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- 中Mn鋼とTRIP型ベイニティックフェライト鋼の応力,塑性ひずみ分配挙動と残留オーステナイトのマルテンサイト変態挙動
Abstract
<p>Stress and plastic strain distributions and those partitioning behaviors of ferrite and retained austenite were investigated in the medium manganese (Mn) and the transformation-induced plasticity-aided bainitic ferrite (TBF) steels, and the martensitic transformation behaviors of retained austenite during Lüders elongation and work hardening were analyzed using synchrotron X-ray diffraction at SPring-8. The stress and plastic strain of retained austenite and volume fraction of retained austenite were remarkably changed during Lüders deformation in the medium Mn steel, implying that the medium Mn steel possessed inhomogeneous deformation at the parallel part of the tensile specimen. On the other hand, the distributions of the stress, plastic strain and volume fraction of retained austenite were homogeneous and the homogeneous deformation occurred at the parallel part of the tensile specimen at the plastic deformation regime with work hardening in the medium Mn and TBF steels. The martensitic transformation of retained austenite at Lüders deformation in the medium Mn steel was possessed owing to the application of high stress and preferential deformation at retained austenite, resulting in a significant increase in the plastic deformation and reduction of stress in the retained austenite. The martensitic transformation of retained austenite at the plastic deformation regime with work hardening was induced by the high dislocation density and newly applied plastic deformation in retained austenite in the medium Mn steel whereas the TBF steel possessed gradual transformation of retained austenite which is applied high tensile stress and moderate plastic deformation.</p>
Journal
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- Tetsu-to-Hagane
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Tetsu-to-Hagane 110 (3), 227-240, 2024-02-15
The Iron and Steel Institute of Japan
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Details 詳細情報について
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- CRID
- 1390299151931043712
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- ISSN
- 18832954
- 00211575
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- Text Lang
- ja
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- Data Source
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- JaLC
- Crossref
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- Abstract License Flag
- Disallowed