Interfacial dislocations dominated lateral growth of long-period stacking ordered phase in Mg alloys

doi:10.1016/j.jmst.2020.05.045

IMR OpenIR

	Interfacial dislocations dominated lateral growth of long-period stacking ordered phase in Mg alloys
	Jin, Qianqian 1; Shao, Xiaohong 1; Zheng, Shijian 3; Zhou, Yangtao 1; Zhang, Bo 1; Ma, Xiuliang 1,2
通讯作者	Shao, Xiaohong(xhshao@imr.ac.cn) ; Ma, Xiuliang(xlma@imr.ac.cn)
	2021-01-20
发表期刊	JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
ISSN	1005-0302
卷号	61 页码:114-118
摘要	Understanding the interface between strengthening precipitates and matrix in alloys, especially at the atomic level, is a critical issue for tailoring the precipitate strengthening to achieve desired mechanical properties. Using high-resolution scanning transmission electron microscopy, we here clarify the semi-coherent interfaces between the matrix and long-period stacking ordered (LPSO) phases, including 18R and 14H, in Mg-Zn-Y alloys. The LPSO/Mg interface features the unique configuration of the Shockley partial dislocations, which produces a near zero macroscopic strain because the net Burgers vectors equal zero. The 18R/Mg interface characterizes a dissociated structure that can be described as a narrow slab of 54R. There are two dislocation arrays accompanied to the 18R/54R and 54R/Mg interface, resulting a slight deviation (about 2.3 degrees). The 14R/Mg interface exhibits the dislocation pairs associated with solute atoms. We further evaluate the stability and morphology of the corresponding interfaces based on elastic interaction, via calculating the mutual strong interactions between dislocation arrays, as well as that between the dislocations and solute atoms. The synchronized migration of interfacial dislocations and solute atoms, like move-drag behavior, dominates the lateral growth of LPSO phases in Mg alloys. (C) 2021 Published by Elsevier Ltd on behalf of The editorial office of Journal of Materials Science & Technology.
关键词	Magnesium alloys Long-period stacking ordered phases Dislocations Heterogeneous interface
资助者	National Natural Science Foundation of China ; Liaoning Provincial Natural Science Foundation
DOI	10.1016/j.jmst.2020.05.045
收录类别	SCI
语种	英语
资助项目	National Natural Science Foundation of China[51801214] ; National Natural Science Foundation of China[51871222] ; Liaoning Provincial Natural Science Foundation[2019-MS335]
WOS研究方向	Materials Science ; Metallurgy & Metallurgical Engineering
WOS类目	Materials Science, Multidisciplinary ; Metallurgy & Metallurgical Engineering
WOS记录号	WOS:000600062800011
出版者	JOURNAL MATER SCI TECHNOL
引用统计	被引频次：10[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/321006/158730
专题	中国科学院金属研究所
通讯作者	Shao, Xiaohong; Ma, Xiuliang
作者单位	1.Chinese Acad Sci, Inst Met Res, Shenyang Natl Lab Mat Sci, Shenyang 110016, Peoples R China 2.Lanzhou Univ Technol, Sch Mat Sci & Engn, Lanzhou 730050, Peoples R China 3.Hebei Univ Technol, Sch Mat Sci & Engn, Res Inst Energy Equipment Mat, Tianjin 300130, Peoples R China
推荐引用方式 GB/T 7714	Jin, Qianqian,Shao, Xiaohong,Zheng, Shijian,et al. Interfacial dislocations dominated lateral growth of long-period stacking ordered phase in Mg alloys[J]. JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY,2021,61:114-118.
APA	Jin, Qianqian,Shao, Xiaohong,Zheng, Shijian,Zhou, Yangtao,Zhang, Bo,&Ma, Xiuliang.(2021).Interfacial dislocations dominated lateral growth of long-period stacking ordered phase in Mg alloys.JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY,61,114-118.
MLA	Jin, Qianqian,et al."Interfacial dislocations dominated lateral growth of long-period stacking ordered phase in Mg alloys".JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY 61(2021):114-118.