| Atomic-scale evidence of chemical short-range order in CrCoNi medium-entropy alloy | |
Zhou LL(周玲玲)1,2; Wang, Qi3; Wang J(王晶)1 ; Chen XF(陈雪飞)1,2; Jiang P(姜萍)1; Zhou, Hao4; Yuan FP(袁福平)1,2; Wu XL(武晓雷)1,2; Cheng, Zhiying5; Ma, En6
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| Corresponding Author | Wu, Xiaolei([email protected]) ; Cheng, Zhiying([email protected]) ; Ma, En([email protected]) |
| Source Publication | ACTA MATERIALIA
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| 2022-02-01 | |
| Volume | 224Pages:11 |
| ISSN | 1359-6454 |
| Abstract | High (or medium)-entropy alloys (H/MEAs) are complex concentrated solid solutions that may develop chemical short-range order (CSRO). In this regard, CrCoNi, the prototypical face-centered-cubic MEA, has recently kindled a debate in the H/MEA community, as it is uncertain if CSRO can possibly form in such a multi-principal-element solution, where no equilibrium or metastable intermetallic compounds have ever been seen or predicted. To answer this challenging question, here we present firm experimental evidence for the CSRO from electron diffraction as well as atomic-resolution chemical mapping, under an appropri-ate zone axis. We also develop a methodology to reliably determine the locations of atomic columns from the line scan profiles in the chemical maps, as well as a quantitative covariance-based correlation analysis of the column chemical compositions to reveal the spatial correlations between various atomic pairs. The detailed chemical information affirms the tendency for like-pair avoidance and unlike-pair preference, specifies the preferred atomic packing and plane stacking by the three constituent species, and suggests a proposed atomic configuration that constitutes the CSRO motif. The fraction of CSRO regions is mod-erately lowered after either plastic deformation or high-temperature heating. A comparison is also made with previous attempts to identify CSROs in H/MEAs. (c) 2021 The Author(s). Published by Elsevier Ltd on behalf of Acta Materialia Inc. This is an open access article under the CC BY-NC-ND license ( http://creativecommons.org/licenses/by-nc-nd/4.0/ ) |
| Keyword | Chemical short-range order High-entropy alloy Microstructure |
| DOI | 10.1016/j.actamat.2021.117490 |
| Indexed By | SCI ; EI |
| Language | 英语 |
| WOS ID | WOS:000788848600007 |
| WOS Keyword | ELECTRON |
| WOS Research Area | Materials Science ; Metallurgy & Metallurgical Engineering |
| WOS Subject | Materials Science, Multidisciplinary ; Metallurgy & Metallurgical Engineering |
| Funding Project | Ministry of Science and Technology of China[2019YFA0209900] ; NSFC[11972350] ; NSFC[11890680] ; NSFC[11988102] ; Chinese Academy of Sciences[XDB22040503] |
| Funding Organization | Ministry of Science and Technology of China ; NSFC ; Chinese Academy of Sciences |
| Classification | 一类 |
| Ranking | 1 |
| Contributor | Wu, Xiaolei ; Cheng, Zhiying ; Ma, En |
| Citation statistics | |
| Document Type | 期刊论文 |
| Identifier | http://dspace.imech.ac.cn/handle/311007/89076 |
| Collection | 非线性力学国家重点实验室 |
| Affiliation | 1.Chinese Acad Sci, Inst Mech, State Key Lab Nonlinear Mech, Beijing 100190, Peoples R China; 2.Univ Chinese Acad Sci, Sch Engn Sci, Beijing 100049, Peoples R China; 3.Sci & Technol Surface Phys & Chem Lab, POB 9-35, Jiangyou 621908, Peoples R China; 4.Nanjing Univ Sci & Technol, Nano & Heterogeneous Mat Ctr, Sch Mat Sci & Engn, Nanjing 210094, Peoples R China; 5.Tsinghua Univ, Natl Ctr Electron Microscopy Beijing, Sch Mat Sci & Engn, Beijing 100084, Peoples R China; 6.Xi An Jiao Tong Univ, Ctr Alloy Innovat & Design CAID, State Key Lab Mech Behav Mat, Xian 710049, Peoples R China |
| Recommended Citation GB/T 7714 | Zhou LL,Wang, Qi,Wang J,et al. Atomic-scale evidence of chemical short-range order in CrCoNi medium-entropy alloy[J]. ACTA MATERIALIA,2022,224:11.Rp_Au:Wu, Xiaolei, Cheng, Zhiying, Ma, En |
| APA | 周玲玲.,Wang, Qi.,王晶.,陈雪飞.,姜萍.,...&Ma, En.(2022).Atomic-scale evidence of chemical short-range order in CrCoNi medium-entropy alloy.ACTA MATERIALIA,224,11. |
| MLA | 周玲玲,et al."Atomic-scale evidence of chemical short-range order in CrCoNi medium-entropy alloy".ACTA MATERIALIA 224(2022):11. |
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| Jp2022FA530_2022_Ato（5932KB） | 期刊论文 | 出版稿 | 开放获取 | CC BY-NC-SA | View Download | |
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