Atomic-resolution studies on reactions between basal dislocations and {10(1)over-bar2} coherent twin boundaries in a Mg alloy

doi:10.1016/j.jmst.2020.06.017

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	Atomic-resolution studies on reactions between basal dislocations and {10(1)over-bar2} coherent twin boundaries in a Mg alloy
	Su, Huhu 1; Zhou, Xinzhe 1; Zheng, Shijian 3; Ye, Hengqiang 1,2; Yang, Zhiqing 1
刊名	JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
	2021-03-10
卷号	66 页码:28-35
关键词	Mg alloys Dislocation Twin boundary Migration Plastic deformation
ISSN号	1005-0302
DOI	10.1016/j.jmst.2020.06.017
通讯作者	Yang, Zhiqing(yangzq@imr.ac.cn)
英文摘要	Reactions between basal < a(60)> dislocations and {10 (1) over bar2} coherent twin boundaries (CTBs) in a Mg alloy were studied with atomic resolution. Individual dislocation-CTB reactions produced steps with residual dislocations and multiple twinning dislocations (TDs) gliding away, consequently resulting in TB migration. Reactions between {10 (1) over bar2} CTBs and low-angle grain boundaries composed of basal < a(60)> dislocations created either basal-prismatic/prismatic-basal interfaces or asymmetric tilt grain boundaries, depending on whether TDs gliding away or not. Not only the emission of TDs by dislocation-TB reactions may drive TB migration, but also the resultant steps or facets along TBs can act as TD sources to facilitate TB migration. Our results indicate that roughness or severe loss of local coherency induced by dislocation-TB reactions does not intrinsically impede TB migration in Mg alloys. Dislocation-TB reactions may provide another feasible strategy to improve the ductility of Mg alloys, in addition to other techniques like grain refinement and texture modification. (C) 2021 Published by Elsevier Ltd on behalf of The editorial office of Journal of Materials Science & Technology.
资助项目	National Natural Science Foundation of China[51971225] ; National Natural Science Foundation of China[51771202] ; National Natural Science Foundation of China[51771201] ; Key Research Program of Frontier Sciences, CAS[QYZDY-SSW-JSC027]
WOS研究方向	Materials Science ; Metallurgy & Metallurgical Engineering
语种	英语
出版者	JOURNAL MATER SCI TECHNOL
WOS记录号	WOS:000610200200004
资助机构	National Natural Science Foundation of China ; Key Research Program of Frontier Sciences, CAS
内容类型	期刊论文
源URL	[http://ir.imr.ac.cn/handle/321006/159105]
专题	金属研究所_中国科学院金属研究所
通讯作者	Yang, Zhiqing
作者单位	1.Univ Sci & Technol China, Chinese Acad Sci, Sch Mat Sci & Engn, Shenyang Natl Lab Mat Sci,Inst Met Res, Shenyang 110016, Peoples R China 2.Jihua Lab, Foshan 528251, Peoples R China 3.Hebei Univ Technol, State Key Lab Reliabil & Intelligence Elect Equip, Tianjin 300130, Peoples R China
推荐引用方式 GB/T 7714	Su, Huhu,Zhou, Xinzhe,Zheng, Shijian,et al. Atomic-resolution studies on reactions between basal dislocations and {10(1)over-bar2} coherent twin boundaries in a Mg alloy[J]. JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY,2021,66:28-35.
APA	Su, Huhu,Zhou, Xinzhe,Zheng, Shijian,Ye, Hengqiang,&Yang, Zhiqing.(2021).Atomic-resolution studies on reactions between basal dislocations and {10(1)over-bar2} coherent twin boundaries in a Mg alloy.JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY,66,28-35.
MLA	Su, Huhu,et al."Atomic-resolution studies on reactions between basal dislocations and {10(1)over-bar2} coherent twin boundaries in a Mg alloy".JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY 66(2021):28-35.