Repulsive force between screw dislocation and coherent twin boundary in aluminum and copper

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	Repulsive force between screw dislocation and coherent twin boundary in aluminum and copper
	Z. M. Chen; Z. H. Jin; H. J. Gao
	2007
发表期刊	Physical Review B
ISSN	1098-0121
卷号	75 期号:21
摘要	Molecular dynamics (MD) simulations in combination with an atomistic path technique are used to examine energies required to impinge a screw dislocation on a coherent twin boundary (CTB) in Al and Cu. At large distances, we find that the dislocation-CTB interaction is characterized by repulsive forces which can be attributed to both the elasticity mismatch and distortion (shift and rotation) of deformation fields across the twin boundary. The repulsive forces are determined as a function of distance between the dislocation and the twin boundary based on our MD data and the classical dislocation theory. At short distances, the interaction is significantly influenced by the shear strength of the CTB: relatively low CTB shear strength can induce close-range attractive forces and cause slip to be absorbed into the twin plane.
部门归属	shanghai jiao tong univ, sch mat sci & engn, shanghai 200240, peoples r china. forschungszentrum karlsruhe, inst nanotechnol, d-76021 karlsruhe, germany. chinese acad sci, shenyang natl lab mat sci, met res inst, shenyang 11006, peoples r china. brown univ, div engn, providence, ri 02912 usa.;jin, zh (reprint author), shanghai jiao tong univ, sch mat sci & engn, shanghai 200240, peoples r china;jinzh@sjtu.edu.cn
关键词	Cross-slip Nanocrystalline Materials Bimetallic Interface Metals Transmission Deformation Simulations Composites Resistance Strength
URL	查看原文
WOS记录号	WOS:000247624700004
引用统计	被引频次：86[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://ir.imr.ac.cn/handle/321006/33474
专题	中国科学院金属研究所
推荐引用方式 GB/T 7714	Z. M. Chen,Z. H. Jin,H. J. Gao. Repulsive force between screw dislocation and coherent twin boundary in aluminum and copper[J]. Physical Review B,2007,75(21).
APA	Z. M. Chen,Z. H. Jin,&H. J. Gao.(2007).Repulsive force between screw dislocation and coherent twin boundary in aluminum and copper.Physical Review B,75(21).
MLA	Z. M. Chen,et al."Repulsive force between screw dislocation and coherent twin boundary in aluminum and copper".Physical Review B 75.21(2007).