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

IMR OpenIR

	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 2; Ye, Hengqiang 1,3; Yang, Zhiqing 1
通讯作者	Yang, Zhiqing(yangzq@imr.ac.cn)
	2021-03-10
发表期刊	JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
ISSN	1005-0302
卷号	66 页码:28-35
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.
关键词	Mg alloys Dislocation Twin boundary Migration Plastic deformation
资助者	National Natural Science Foundation of China ; Key Research Program of Frontier Sciences, CAS
DOI	10.1016/j.jmst.2020.06.017
收录类别	SCI
语种	英语
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
WOS类目	Materials Science, Multidisciplinary ; Metallurgy & Metallurgical Engineering
WOS记录号	WOS:000610200200004
出版者	JOURNAL MATER SCI TECHNOL
引用统计	被引频次：21[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/321006/159106
专题	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.Hebei Univ Technol, State Key Lab Reliabil & Intelligence Elect Equip, Tianjin 300130, Peoples R China 3.Jihua Lab, Foshan 528251, 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.