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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
Source PublicationJOURNAL OF THE MECHANICS AND PHYSICS OF SOLIDS
2017
Volume98Pages:290-308
ISSN0022-5096
Abstract

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.

KeywordMolecular Dynamics Simulation Deformation Twinning Stacking Faults Dislocations
DOI10.1016/j.jmps.2016.09.008
URL查看原文
Indexed BySCI ; EI
Language英语
WOS IDWOS:000390972900016
WOS KeywordMolecular dynamics simulation ; Deformation twinning ; Stacking faults ; Dislocations
WOS Research AreaMaterials Science ; Mechanics ; Physics
WOS SubjectMaterials Science, Multidisciplinary ; Mechanics ; Physics, Condensed Matter
Funding Organization[11321202] ; [11572281]
DepartmentLNM微结构计算力学
Classification一类/力学重要期刊
Ranking5
Citation statistics
Document Type期刊论文
Identifierhttp://dspace.imech.ac.cn/handle/311007/59969
Collection非线性力学国家重点实验室
Corresponding AuthorWang, HT
Recommended Citation
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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