Chemical decomposition along dislocations during plastic deformation

doi:10.1103/PhysRevMaterials.3.033602

IMR OpenIR

	Chemical decomposition along dislocations during plastic deformation
	Yang, Zhiqing; Hu, Weiwei; Zhang, Lifeng; Ye, Hengqiang
通讯作者	Yang, Zhiqing(yangzq@imr.ac.cn)
	2019-03-11
发表期刊	PHYSICAL REVIEW MATERIALS
ISSN	2475-9953
卷号	3 期号:3 页码:6
摘要	Chemical decomposition of compound phases has been observed in many engineering alloys subjected to plastic deformation. However, little is known about the role of dislocations moving within compounds in their deformation-induced chemical decomposition. We report observations of chemical decomposition of compound crystals along dislocations with atomic resolution, which is inconsistent with the well-established dislocation theory. Transition-metal (TM) and rare-earth element (RE) atoms in the wake of moving partial dislocations are removed out of Mg-TM-RE compounds in magnesium alloys, producing magnesium nanoslices inside. Glide of partial dislocations forces local transformation from face-centered cubic to hexagonal structures with supersaturated TM and RE in Mg-TM-RE compounds. TM and RE atoms behind moving partial dislocations are then relocated into adjacent magnesium grains through pipe diffusion, under the driving force of supersaturated chemical potential. Our observations demonstrate atomically spatial coupling of individual moving dislocations and chemical decomposition within bulk crystals during plastic deformation, providing insights into dislocations and their roles in materials.
资助者	National Natural Science Foundation of China ; Key Research Program of Frontier Sciences, CAS
DOI	10.1103/PhysRevMaterials.3.033602
收录类别	SCI
语种	英语
资助项目	National Natural Science Foundation of China[51390473] ; National Natural Science Foundation of China[51371178] ; National Natural Science Foundation of China[51771202] ; Key Research Program of Frontier Sciences, CAS[QYZDY-SSW-JSC027]
WOS研究方向	Materials Science
WOS类目	Materials Science, Multidisciplinary
WOS记录号	WOS:000461076800001
出版者	AMER PHYSICAL SOC
引用统计	被引频次：4[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/321006/132242
专题	中国科学院金属研究所
通讯作者	Yang, Zhiqing
作者单位	Chinese Acad Sci, Inst Met Res, Shenyang Natl Lab Mat Sci, Shenyang 110016, Liaoning, Peoples R China
推荐引用方式 GB/T 7714	Yang, Zhiqing,Hu, Weiwei,Zhang, Lifeng,et al. Chemical decomposition along dislocations during plastic deformation[J]. PHYSICAL REVIEW MATERIALS,2019,3(3):6.
APA	Yang, Zhiqing,Hu, Weiwei,Zhang, Lifeng,&Ye, Hengqiang.(2019).Chemical decomposition along dislocations during plastic deformation.PHYSICAL REVIEW MATERIALS,3(3),6.
MLA	Yang, Zhiqing,et al."Chemical decomposition along dislocations during plastic deformation".PHYSICAL REVIEW MATERIALS 3.3(2019):6.