Local decomposition induced by dislocation motions inside precipitates in an Al-alloy

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	Local decomposition induced by dislocation motions inside precipitates in an Al-alloy
	B. Yang; Y. T. Zhou; D. Chen; X. L. Ma
	2013
发表期刊	Scientific Reports
ISSN	2045-2322
卷号	3
摘要	Dislocations in crystals are linear crystallographic defects, which move in lattice when crystals are plastically deformed. Motion of a partial dislocation may remove or create stacking fault characterized with a partial of a lattice translation vector. Here we report that motion of partial dislocations inside an intermetallic compound result in a local composition deviation from its stoichiometric ratio, which cannot be depicted with any vectors of the primary crystal. Along dislocation slip bands inside the deformed Al2Cu particles, redistribution of Cu and Al atoms leads to a local decomposition and collapse of the original crystal structure. This finding demonstrates that dislocation slip may induce destabilization in complex compounds, which is fundamentally different from that in monometallic crystals. This phenomenon of chemical unmixing of initially homogeneous multicomponent solids induced by dislocation motion might also have important implications for understanding the geologic evolvement of deep-focus peridotites in the Earth.
部门归属	[yang, b. ; zhou, y. t. ; chen, d. ; ma, x. l.] chinese acad sci, shenyang natl lab mat sci, inst met res, shenyang 110016, peoples r china. ; ma, xl (reprint author), chinese acad sci, shenyang natl lab mat sci, inst met res, wenhua rd 72, shenyang 110016, peoples r china. ; xlma@imr.ac.cn
关键词	Mechanical Attrition Treatment Severe Plastic-deformation Pearlitic Steel Cementite Microstructure Temperatures Dissolution Stress
URL	查看原文
语种	英语
文献类型	期刊论文
条目标识符	http://ir.imr.ac.cn/handle/321006/71622
专题	中国科学院金属研究所
推荐引用方式 GB/T 7714	B. Yang,Y. T. Zhou,D. Chen,et al. Local decomposition induced by dislocation motions inside precipitates in an Al-alloy[J]. Scientific Reports,2013,3.
APA	B. Yang,Y. T. Zhou,D. Chen,&X. L. Ma.(2013).Local decomposition induced by dislocation motions inside precipitates in an Al-alloy.Scientific Reports,3.
MLA	B. Yang,et al."Local decomposition induced by dislocation motions inside precipitates in an Al-alloy".Scientific Reports 3(2013).