Interactions between non-screw lattice dislocations and coherent twin boundaries in face-centered cubic metals

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	Interactions between non-screw lattice dislocations and coherent twin boundaries in face-centered cubic metals
	Z. H. Jin; P. Gumbsch; K. Albe; E. Ma; K. Lu; H. Gleiter; H. Hahn
	2008
发表期刊	Acta Materialia
ISSN	1359-6454
卷号	56 期号:5 页码:1126-1135
摘要	In a first report [Jin ZH.. Gumbsch P, Ma E, Albe K, Lu K, Hahn H, et al. Scripta Mater 2006;54:1163], interactions between screw dislocation and coherent twin boundary (CTB) were studied via molecular dynamics simulations for three face-centered cubic (fcc) metals, Cu, Ni and Al. To complement those preliminary results, purely stress-driven interactions between 60 degrees non-screw lattice dislocation and CTB are considered in this paper. Depending on the material and the applied strain, slip has been observed to interact with the boundary in different ways. If a 60 degrees dislocation is forced by an external stress into a CTB, it dissociates into different partial dislocations gliding into the twin as well as along the twin boundary. A sessile dislocation lock may be generated at the CTB if the transited slip is incomplete. The details of the interaction are controlled by the material-dependent energy barriers for the formation of Shockley partial dislocations from the site where the lattice dislocation impinges upon the boundary. (c) 2007 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.
部门归属	[jin, z. -h.] shanghai jiao tong univ, sch mat sci & engn, shanghai 200240, peoples r china. [jin, z. -h.; gleiter, h.; hahn, h.] forschungszentrum karlsruhe, inst nanotechnol, d-76021 karlsruhe, germany. [gumbsch, p.] univ karlsruhe, izbs, d-76131 karlsruhe, germany. [albe, k.] tech univ darmstadt, inst materialwissensch, d-64287 darmstadt, germany. [ma, e.] johns hopkins univ, dept mat sci & engn, baltimore, md 21218 usa. [lu, k.] chinese acad sci, inst met res, shenyang natl lab mat sci, shenyang 110016, peoples r china.;jin, zh (reprint author), shanghai jiao tong univ, sch mat sci & engn, shanghai 200240, peoples r china;jinzh@sjtu.edu.cn
关键词	Dislocation Slip Twinning Twin Grain Boundary Molecular Dynamics Molecular-dynamics Simulation Grain-boundaries Nanocrystalline Materials Cross-slip Rate Sensitivity Deformation Copper Strength Aluminum Fcc
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WOS记录号	WOS:000254183000022
引用统计	被引频次：475[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/321006/32850
专题	中国科学院金属研究所
推荐引用方式 GB/T 7714	Z. H. Jin,P. Gumbsch,K. Albe,et al. Interactions between non-screw lattice dislocations and coherent twin boundaries in face-centered cubic metals[J]. Acta Materialia,2008,56(5):1126-1135.
APA	Z. H. Jin.,P. Gumbsch.,K. Albe.,E. Ma.,K. Lu.,...&H. Hahn.(2008).Interactions between non-screw lattice dislocations and coherent twin boundaries in face-centered cubic metals.Acta Materialia,56(5),1126-1135.
MLA	Z. H. Jin,et al."Interactions between non-screw lattice dislocations and coherent twin boundaries in face-centered cubic metals".Acta Materialia 56.5(2008):1126-1135.