Chemical short range orders in high /medium entropy alloys

doi:10.1016/j.jmst.2022.10.070

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	Chemical short range orders in high /medium entropy alloys
	Wu XL(武晓雷)
发表期刊	JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
	2023-06-01
卷号	147 页码:189-196
ISSN	1005-0302
摘要	High (or medium) entropy alloys (H/MEAs) are complex concentrated solid solutions prone to develop the chemical short range orders (CSROs), as an indispensable structural constituent to make H/MEAs essen tially different from the traditional alloys. The CSROs are predicted to play roles in dislocation behaviors and mechanical properties. So far, the image of CSROs is built up by the theoretical modeling and com putational simulations in terms of the conventional concept, i.e., the preference/avoidance of elemental species to satisfy the short ranged ordering in the first and the next couple of nearest neighbor atomic shells. In these simulated CSROs, however, the structural image is missing on the atomic scale, even though the lattice periodicity does not exist in the CSROs. Further, it is pending as to the issues if and what kind of CSRO may be formed in a specific H/MEA. All these are ascribed to the challenge of experi mentally seeing the CSROs. Until recently, the breakthrough does not appear to convincingly identify the CSROs in the H/MEAs by using the state of the art transmission electron microscope. To be specific, the electron diffractions provide solid evidence to doubtlessly ascertain CSROs. The structure motif of CSROs is then constructed, showing both the lattice structure and species ordering occupation, along with the stereoscopic topography of the CSRO. It is suggested that the CSROs, as the first landscape along the path of development of the local chemical ordering, offer one more route to substantially develop the ordered structure on the atomic scale in the H/MEAs, parallel to the existing grain leveled microstruc ture. The findings of CSROs make a step forward to understand the CSROs oriented relationship between the microstructure and mechanical properties. This review focuses on the recent progress mainly in the experimental aspects of the identification, structure motif, and mechanical stability in CSROs, along with the chemical medium range orders as the growing CSROs.(c) 2023 Published by Elsevier Ltd on behalf of The editorial office of Journal of Materials Science & Technology. This is an open access article under the CC BY NC ND license ( http://creativecommons.org/licenses/by nc nd/4.0/ )
关键词	Chemical short range order Electron diffraction Transmission electron microscopy Structure motif Chemical medium range order High medium entropy alloys
DOI	10.1016/j.jmst.2022.10.070
收录类别	SCI ; EI
语种	英语
WOS记录号	WOS:000927764300001
WOS研究方向	Materials Science, Multidisciplinary ; Metallurgy & Metallurgical Engineering
WOS类目	Materials Science ; Metallurgy & Metallurgical Engineering
项目资助者	National Key Re search and Development Program of the Ministry of Science and Technology of China [2019YFA0209902] ; National Natu ral Science Foundation of China [11998102, 11972350, 11790293] ; Strategic Priority Research Program of the Chi nese Academy of Sciences [XDB22040503]
论文分区	一类
力学所作者排名	1
RpAuthor	Wu, XL (corresponding author), Chinese Acad Sci, Inst Mech, State Key Lab Nonlinear Mech, Beijing 100190, Peoples R China.
引用统计	被引频次：29[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://dspace.imech.ac.cn/handle/311007/91851
专题	非线性力学国家重点实验室
作者单位	1.Chinese Acad Sci, Inst Mech, State Key Lab Nonlinear Mech, Beijing 100190, Peoples R China 2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
推荐引用方式 GB/T 7714	Wu XL. Chemical short range orders in high /medium entropy alloys[J]. JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY,2023,147:189-196.Rp_Au:Wu, XL (corresponding author), Chinese Acad Sci, Inst Mech, State Key Lab Nonlinear Mech, Beijing 100190, Peoples R China.
APA	武晓雷.(2023).Chemical short range orders in high /medium entropy alloys.JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY,147,189-196.
MLA	武晓雷."Chemical short range orders in high /medium entropy alloys".JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY 147(2023):189-196.

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