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Interfacial dislocations dominated lateral growth of long-period stacking ordered phase in Mg alloys
Jin, Qianqian1; Shao, Xiaohong1; Zheng, Shijian3; Zhou, Yangtao1; Zhang, Bo1; Ma, Xiuliang1,2
Corresponding AuthorShao, Xiaohong(xhshao@imr.ac.cn) ; Ma, Xiuliang(xlma@imr.ac.cn)
2021-01-20
Source PublicationJOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
ISSN1005-0302
Volume61Pages:114-118
AbstractUnderstanding 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.
KeywordMagnesium alloys Long-period stacking ordered phases Dislocations Heterogeneous interface
Funding OrganizationNational Natural Science Foundation of China ; Liaoning Provincial Natural Science Foundation
DOI10.1016/j.jmst.2020.05.045
Indexed BySCI
Language英语
Funding ProjectNational Natural Science Foundation of China[51801214] ; National Natural Science Foundation of China[51871222] ; Liaoning Provincial Natural Science Foundation[2019-MS335]
WOS Research AreaMaterials Science ; Metallurgy & Metallurgical Engineering
WOS SubjectMaterials Science, Multidisciplinary ; Metallurgy & Metallurgical Engineering
WOS IDWOS:000600062800011
PublisherJOURNAL MATER SCI TECHNOL
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Document Type期刊论文
Identifierhttp://ir.imr.ac.cn/handle/321006/158730
Collection中国科学院金属研究所
Corresponding AuthorShao, Xiaohong; Ma, Xiuliang
Affiliation1.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
Recommended Citation
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.
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