Chemical short range orders in high /medium entropy alloys
文献类型：期刊论文
| 作者 | Wu XL(武晓雷)
|
| 刊名 | JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
 |
| 出版日期 | 2023-06-01 |
| 卷号 | 147页码:189-196 |
| 关键词 | Chemical short range order Electron diffraction Transmission electron microscopy Structure motif Chemical medium range order High medium entropy alloys |
| ISSN号 | 1005-0302 |
| DOI | 10.1016/j.jmst.2022.10.070 |
| 英文摘要 | 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/ ) |
| 分类号 | 一类 |
| WOS研究方向 | Materials Science, Multidisciplinary ; Metallurgy & Metallurgical Engineering |
| 语种 | 英语 |
| WOS记录号 | WOS:000927764300001 |
| 资助机构 | 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] |
| 其他责任者 | Wu, XL (corresponding author), Chinese Acad Sci, Inst Mech, State Key Lab Nonlinear Mech, Beijing 100190, Peoples R China. |
| 源URL | [http://dspace.imech.ac.cn/handle/311007/91851]  |
| 专题 | 力学研究所_非线性力学国家重点实验室 |
| 作者单位 | 1.Univ Chinese Acad Sci, Beijing 100049, Peoples R China 2.Chinese Acad Sci, Inst Mech, State Key Lab Nonlinear Mech, Beijing 100190, 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. |
| 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. |
入库方式： OAI收割
来源：力学研究所
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