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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
Corresponding AuthorCheng, Z. Y.( ; Ma, E.( ; Wu, X. L.(
AbstractChemical 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.
KeywordChemical short-range order High-entropy alloy Spatially correlated distribution Fe50Mn30Co10Cr10
Indexed BySCI ; EI
WOS IDWOS:000708164600002
WOS Research AreaScience & Technology - Other Topics ; Materials Science
WOS SubjectNanoscience & Nanotechnology ; Materials Science, Multidisciplinary
Funding ProjectMinistry 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]
Funding OrganizationMinistry 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
ContributorCheng, Z. Y. ; Ma, E. ; Wu, X. L.
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Cited Times:3[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Affiliation1.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
Recommended Citation
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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