Atomistic simulation for deforming complex alloys with application toward TWIP steel and associated physical insights | |
Wang P; Xu SF; Liu JB; Li XY; Wei YJ(魏宇杰); Wang HT; Gao HJ; Yang W; Wang, HT | |
发表期刊 | JOURNAL OF THE MECHANICS AND PHYSICS OF SOLIDS |
2017 | |
卷号 | 98页码:290-308 |
ISSN | 0022-5096 |
摘要 | The interest in promoting deformation twinning for plasticity is mounting for advanced materials. In contrast to disordered grain boundaries, highly organized twin boundaries are beneficial to promoting strength-ductility combination. Twinning deformation typically involves the kinetics of stacking faults, its interplay with dislocations, as well as the interactions between dislocations and twin boundaries. While the latter has been intensively studied, the dynamics of stacking faults has been rarely touched upon. In this work, we report new physical insights on the stacking fault dynamics in twin induced plasticity (TWIP) steels. The atomistic simulation is made possible by a newly introduced approach: meta-atom-molecular dynamics simulation. The simulation suggests that the stacking fault interactions are dominated by dislocation reactions that take place spontaneously, different from the existing mechanisms. Whether to generate a single stacking fault, or a twinning partial and a trailing partial dislocation, depends upon a unique parameter, namely the stacking fault energy. The latter in turn determines the deformation twinning characteristics. The complex twin-slip and twin-dislocation interactions demonstrate the dual role of deformation twins as both the dislocation barrier and dislocation storage. This duality contributes to the high strength and high ductility of TWIP steels. |
关键词 | Molecular Dynamics Simulation Deformation Twinning Stacking Faults Dislocations |
DOI | 10.1016/j.jmps.2016.09.008 |
URL | 查看原文 |
收录类别 | SCI ; EI |
语种 | 英语 |
WOS记录号 | WOS:000390972900016 |
关键词[WOS] | Molecular dynamics simulation ; Deformation twinning ; Stacking faults ; Dislocations |
WOS研究方向 | Materials Science ; Mechanics ; Physics |
WOS类目 | Materials Science, Multidisciplinary ; Mechanics ; Physics, Condensed Matter |
项目资助者 | [11321202] ; [11572281] |
课题组名称 | LNM微结构计算力学 |
论文分区 | 一类/力学重要期刊 |
力学所作者排名 | 5 |
引用统计 | |
文献类型 | 期刊论文 |
条目标识符 | http://dspace.imech.ac.cn/handle/311007/59969 |
专题 | 非线性力学国家重点实验室 |
通讯作者 | Wang, HT |
推荐引用方式 GB/T 7714 | Wang P,Xu SF,Liu JB,et al. Atomistic simulation for deforming complex alloys with application toward TWIP steel and associated physical insights[J]. JOURNAL OF THE MECHANICS AND PHYSICS OF SOLIDS,2017,98:290-308. |
APA | Wang P.,Xu SF.,Liu JB.,Li XY.,Wei YJ.,...&Wang, HT.(2017).Atomistic simulation for deforming complex alloys with application toward TWIP steel and associated physical insights.JOURNAL OF THE MECHANICS AND PHYSICS OF SOLIDS,98,290-308. |
MLA | Wang P,et al."Atomistic simulation for deforming complex alloys with application toward TWIP steel and associated physical insights".JOURNAL OF THE MECHANICS AND PHYSICS OF SOLIDS 98(2017):290-308. |
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