Chemical short-range order in Fe50Mn30Co10Cr10 high-entropy alloy

doi:10.1016/j.mtnano.2021.100139

IMECH-IR > 非线性力学国家重点实验室

	Chemical short-range order in Fe50Mn30Co10Cr10 high-entropy alloy
	Liu D(刘动)1,2 ; Wang, Q.3; Wang J(王健)1 ; Chen XF(陈雪飞)1,2; Jiang P(姜萍)1 ; Yuan FP(袁福平)1,2 ; Cheng, Z. Y.4; Ma, E.5; Wu XL(武晓雷)1,2
通讯作者	Cheng, Z. Y.(czy@tsinghua.edu.cn) ; Ma, E.(maen@xjtu.edu.cn) ; Wu, X. L.(xlwu@imech.ac.cn)
发表期刊	MATERIALS TODAY NANO
	2021-12-01
卷号	16 页码:11
ISSN	2588-8420
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.
关键词	Chemical short-range order High-entropy alloy Spatially correlated distribution Fe50Mn30Co10Cr10
DOI	10.1016/j.mtnano.2021.100139
收录类别	SCI ; EI
语种	英语
WOS记录号	WOS:000708164600002
关键词[WOS]	ELECTRON-DIFFRACTION ; TRANSFORMATION ; DEFORMATION
WOS研究方向	Science & Technology - Other Topics ; Materials Science
WOS类目	Nanoscience & Nanotechnology ; Materials Science, Multidisciplinary
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]
项目资助者	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
论文分区	二类/Q1
力学所作者排名	1
RpAuthor	Cheng, Z. Y. ; Ma, E. ; Wu, X. L.
引用统计	被引频次：38[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/311007/87621
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, Sch Engn Sci, Beijing 100049, Peoples R China; 3.Sci & Technol Surface Phys & Chem Lab, POB 9-35, Jiangyou 621908, Peoples R China; 4.Tsinghua Univ, Natl Ctr Electron Microscopy Beijing, Sch Mat Sci & Engn, Beijing 100084, Peoples R China; 5.Xi An Jiao Tong Univ, Ctr Alloy Innovat & Design CAID, State Key Lab Mech Behav Mat, Xian 710049, 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	刘动.,Wang, Q..,王健.,陈雪飞.,姜萍.,...&武晓雷.(2021).Chemical short-range order in Fe50Mn30Co10Cr10 high-entropy alloy.MATERIALS TODAY NANO,16,11.
MLA	刘动,et al."Chemical short-range order in Fe50Mn30Co10Cr10 high-entropy alloy".MATERIALS TODAY NANO 16(2021):11.

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