| 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 Author | Shao, Xiaohong(xhshao@imr.ac.cn) ; Ma, Xiuliang(xlma@imr.ac.cn) |
| 2021-01-20 | |
| Source Publication | JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
 |
| ISSN | 1005-0302 |
| Volume | 61Pages:114-118 |
| Abstract | 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. |
| Keyword | Magnesium alloys Long-period stacking ordered phases Dislocations Heterogeneous interface |
| Funding Organization | National Natural Science Foundation of China ; Liaoning Provincial Natural Science Foundation |
| DOI | 10.1016/j.jmst.2020.05.045 |
| Indexed By | SCI |
| Language | 英语 |
| Funding Project | National Natural Science Foundation of China[51801214] ; National Natural Science Foundation of China[51871222] ; Liaoning Provincial Natural Science Foundation[2019-MS335] |
| WOS Research Area | Materials Science ; Metallurgy & Metallurgical Engineering |
| WOS Subject | Materials Science, Multidisciplinary ; Metallurgy & Metallurgical Engineering |
| WOS ID | WOS:000600062800011 |
| Publisher | JOURNAL MATER SCI TECHNOL |
| Citation statistics | |
| Document Type | 期刊论文 |
| Identifier | http://ir.imr.ac.cn/handle/321006/158730 |
| Collection | 中国科学院金属研究所 |
| Corresponding Author | Shao, Xiaohong; Ma, Xiuliang |
| Affiliation | 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 |
| 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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