Institutional Repository of Coll Mat Sci & Engn
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 | |
2021-01-20 | |
发表期刊 | Journal of Materials Science and Technology |
ISSN | 10050302 |
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°). 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. © 2020 |
关键词 | Atoms Drag High resolution transmission electron microscopy Magnesium metallography Scanning electron microscopy Zinc metallography Elastic interactions High resolution scanning transmission electron microscopies Interfacial dislocations Long period stacking ordered phase Macroscopic strains Precipitate strengthening Semi-coherent interfaces Shockley partial dislocations |
DOI | 10.1016/j.jmst.2020.05.045 |
收录类别 | EI ; SCIE |
语种 | 英语 |
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 | Chinese Society of Metals |
EI入藏号 | 20203008978972 |
EI主题词 | Magnesium alloys |
EI分类号 | 531.2 Metallography - 542.2 Magnesium and Alloys - 741.3 Optical Devices and Systems - 931.3 Atomic and Molecular Physics |
来源库 | Compendex |
分类代码 | 531.2 Metallography - 542.2 Magnesium and Alloys - 741.3 Optical Devices and Systems - 931.3 Atomic and Molecular Physics |
引用统计 | |
文献类型 | 期刊论文 |
条目标识符 | https://ir.lut.edu.cn/handle/2XXMBERH/115507 |
专题 | 材料科学与工程学院 材料科学与工程学院_特聘教授组 |
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 |
通讯作者单位 | 材料科学与工程学院 |
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 and 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 and 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 and Technology 61(2021):114-118. |
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