書誌事項
- タイトル別名
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- Modeling and simulation of dynamic recrystallization for Mg/LPSO alloys based on multi-phase-field and dislocation-based crystal plasticity models
抄録
<p>A dual-phase magnesium alloy consisting of the usual α-Mg phase and a new LPSO (Long-Period Stacking Ordered Structure) phase has been developed and expected for a next-generation structural material owing to its excellent mechanical properties. Its materials strengthening is attributed to both the grain refinement of α-Mg phase generating in the process of dynamic recrystallization and a kink band formations in LPSO phase. In this paper, we develope a dynamic recrystallization model for HCP crystals by coupling the multi-phase-field (MPF) model and the dislocation-based crystal plasticity model through the dislocation density considering material properties of Mg/LPSO alloys. It is widely known that the pinning effect affects the grain refinement in α-Mg phase. Such effect is expressed by taking account of the grain boundary segregation of additional elements. In addition, some multiphysics analyses for Mg/LPSO alloys are carried out, and then nucleation along deformation bands such as kink bands and nucleus growth are numerically reproduced. Furthermore, on the basis of the obtained results, it is indicated that a kink band generates primarily around an α-Mg phase with orientation imperfection, a grain-refinement in α-Mg phase occurs secondarily along a deformation band as a prolongation of the kink band in LPSO phase.</p>
収録刊行物
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- 日本機械学会論文集
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日本機械学会論文集 86 (882), 19-00341-19-00341, 2020
一般社団法人 日本機械学会
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詳細情報 詳細情報について
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- CRID
- 1390283659854048256
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- NII論文ID
- 130007801823
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- ISSN
- 21879761
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- 本文言語コード
- ja
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- データソース種別
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- JaLC
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- 抄録ライセンスフラグ
- 使用不可