Chemical short-range order in Fe50Mn30Co10Cr10 high-entropy alloy

doi:10.1016/j.mtnano.2021.100139

CORC > 力学研究所 > 中国科学院力学研究所 > 非线性力学国家重点实验室

	Chemical short-range order in Fe50Mn30Co10Cr10 high-entropy alloy
	Liu, D.4,5; Wang, Q.3; Wang, J.5; Chen, X. F.4,5; Jiang, P.5; Yuan, F. P.4,5; Cheng, Z. Y.2; Ma, E.1; Wu, X. L.4,5
刊名	MATERIALS TODAY NANO
	2021-12-01
卷号	16 页码:11
关键词	Chemical short-range order High-entropy alloy Spatially correlated distribution Fe50Mn30Co10Cr10
ISSN号	2588-8420
DOI	10.1016/j.mtnano.2021.100139
通讯作者	Cheng, Z. Y.(czy@tsinghua.edu.cn) ; Ma, E.(maen@xjtu.edu.cn) ; Wu, X. L.(xlwu@imech.ac.cn)
英文摘要	Chemical short-range order (CSRO) is generally possible in concentrated solid solutions and currently of considerable interest for multi-principal element alloys. However, a convincing demonstration of CSRO has been challenging and achieved thus far only for ternary medium-entropy alloys such as VCoNi. Here, we report definitive proof of CSRO in a quaternary face-centered-cubic Fe50Mn30Co10Cr10 high-entropy alloy, acquired from systematic electron microscopy experiments. The evidence includes extra diffuse disks in nano-beam electron diffraction patterns, images in state-of-the-art aberration-corrected scanning transmission electron microscope, as well as compositional profiles across neighboring atomic planes/columns in atomic-resolution chemical maps. The CSRO regions are found to occupy an areal fraction of 20% and have dimensions on a sub-nanometer scale. This length scale, as well as the diffraction features of the CSRO, are different from those of intermetallic compound precipitates; as such, the CSRO is not a growing stage of a nucleated second phase, the precipitation of which has been dealt with previously in classical alloys. We further conducted a spatial correlation analysis of the concentrations in atomic columns in the chemical map, enabling us to uncover a general tendency toward nearest-neighbor chemical ordering, specifically, preference for unlike species (such as Fe-Mn) and avoidance for like-species (such as Fe-Fe). The persistence of this trend, the same as that found in VCoNi MEA, recently, is somewhat intriguing for a high-entropy alloy in which all the constituent elements are similar in atomic size and have rather a small enthalpy of mixing. (C) 2021 The Author(s). Published by Elsevier Ltd.
资助项目	Ministry of Science and Technology of China[2019YFA0209900] ; Ministry of Science and Technology of China[2017YFA0204402] ; NSFC Basic Science Center Program[11988102] ; NSFC[11972350] ; NSFC[11890680] ; Chinese Academy of Sciences[XDB22040503] ; Foundation of Institute of Materials, China Academy of Engineering Physics[TP02201713]
WOS关键词	ELECTRON-DIFFRACTION ; TRANSFORMATION ; DEFORMATION
WOS研究方向	Science & Technology - Other Topics ; Materials Science
语种	英语
WOS记录号	WOS:000708164600002
资助机构	Ministry of Science and Technology of China ; NSFC Basic Science Center Program ; NSFC ; Chinese Academy of Sciences ; Foundation of Institute of Materials, China Academy of Engineering Physics
内容类型	期刊论文
源URL	[http://dspace.imech.ac.cn/handle/311007/87620]
专题	力学研究所_非线性力学国家重点实验室
通讯作者	Cheng, Z. Y.; Ma, E.; Wu, X. L.
作者单位	1.Xi An Jiao Tong Univ, Ctr Alloy Innovat & Design CAID, State Key Lab Mech Behav Mat, Xian 710049, Peoples R China 2.Tsinghua Univ, Natl Ctr Electron Microscopy Beijing, Sch Mat Sci & Engn, Beijing 100084, Peoples R China 3.Sci & Technol Surface Phys & Chem Lab, POB 9-35, Jiangyou 621908, Peoples R China 4.Univ Chinese Acad Sci, Sch Engn Sci, Beijing 100049, Peoples R China 5.Chinese Acad Sci, Inst Mech, State Key Lab Nonlinear Mech, Beijing 100190, Peoples R China
推荐引用方式 GB/T 7714	Liu, D.,Wang, Q.,Wang, J.,et al. Chemical short-range order in Fe50Mn30Co10Cr10 high-entropy alloy[J]. MATERIALS TODAY NANO,2021,16:11.
APA	Liu, D..,Wang, Q..,Wang, J..,Chen, X. F..,Jiang, P..,...&Wu, X. L..(2021).Chemical short-range order in Fe50Mn30Co10Cr10 high-entropy alloy.MATERIALS TODAY NANO,16,11.
MLA	Liu, D.,et al."Chemical short-range order in Fe50Mn30Co10Cr10 high-entropy alloy".MATERIALS TODAY NANO 16(2021):11.