Micro-tensile Behaviour of Low-alloy Steel with Bainite/martensite Microstructure
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- Kwak Kwangsik
- Department of Materials Science and Engineering, Kumamoto University
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- Mayama Tsuyoshi
- Department of Materials Science and Engineering, Kumamoto University
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- Mine Yoji
- Department of Materials Science and Engineering, Kumamoto University
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- Takashima Kazuki
- Department of Materials Science and Engineering, Kumamoto University
Abstract
<p>Micro-tensile testing and numerical analysis using a crystal plasticity finite element method (CPFEM) were employed to elucidate the deformation behaviour of bainite/martensite structures of a low-alloy steel. The bainite single-phase specimens exhibited habit-plane-orientation-dependent yielding, similar to the martensite single-phase specimens. In the bainite/martensite dual-phase specimen, deformation concentrated in the bainite region oriented favourably for in-habit-plane slip, leading to low-ductility fracture. With consideration of the habit-plane-orientation-dependent yielding, the present CPFEM analysis successfully reproduced the anisotropic plastic deformation behaviour of the single-phase steels observed in the experiments. The numerical results for the bainite/martensite specimen showed slip localization in the bainite region and stress concentration near the interphase boundary. This suggests that the interphase boundary can be a site for the fracture origin.</p>
Journal
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- ISIJ International
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ISIJ International 56 (12), 2313-2319, 2016
The Iron and Steel Institute of Japan
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Keywords
Details 詳細情報について
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- CRID
- 1390001206487502848
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- NII Article ID
- 130005251232
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- ISSN
- 13475460
- 09151559
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- Text Lang
- en
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- Data Source
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- JaLC
- Crossref
- CiNii Articles
- KAKEN
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- Abstract License Flag
- Disallowed