Chemical medium-range order in a medium-entropy alloy

doi:10.1038/s41467-022-28687-w

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	Chemical medium-range order in a medium-entropy alloy
	Wang J(王晶)2; Jiang P(姜萍)2; Yuan FP(袁福平)1,2; Wu XL(武晓雷)1,2
刊名	NATURE COMMUNICATIONS
	2022-02-23
卷号	13 期号:1 页码:6
DOI	10.1038/s41467-022-28687-w
通讯作者	Wu, Xiaolei(xlwu@imech.ac.cn)
英文摘要	High-/medium-entropy alloys (H/MEA) have the inherent local chemical order. Yet, as a structural link between the incipient short-range order and mature long-range counterpart, the chemical medium-range order (CMRO) is conjectural and remains open questions as to if, and what kind of, CMRO would be produced and if CMRO is mechanically stable during plastic deformation. Here, we show compelling evidences for CMRO in an Al9.5CrCoNi MEA. Specifically, the electron diffraction under both [112] and [013] zone axis show the definite spots for CMRO of lattice periodicity. CMRO entities are seen directly of medium-ranged in sizes by using dark-field imaging, along with the tendency towards like-pair avoidance and unlike-pair preference based on atomic-resolution EDS mapping. These findings substantiate CMRO with a realistic structural picture in view of crystal periodicity and chemical species occupation, shedding light on understanding the microstructural link at an extended length scale beyond the short-range order.
分类号	一类
资助项目	National Key R&D Program of China, MOST[2019YFA0209900] ; National Key R&D Program of China, MOST[2017YFA0204402] ; Natural Science Foundation of China[11988102] ; Natural Science Foundation of China[11972350] ; Natural Science Foundation of China[11790293] ; Strategic Priority Research Program of the Chinese Academy of Sciences[XDB22040503]
WOS关键词	AL ADDITION
WOS研究方向	Science & Technology - Other Topics
语种	英语
WOS记录号	WOS:000760426000004
资助机构	National Key R&D Program of China, MOST ; Natural Science Foundation of China ; Strategic Priority Research Program of the Chinese Academy of Sciences
其他责任者	Wu, Xiaolei
内容类型	期刊论文
源URL	[http://dspace.imech.ac.cn/handle/311007/88739]
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, Sch Engn 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	Wang J,Jiang P,Yuan FP,et al. Chemical medium-range order in a medium-entropy alloy[J]. NATURE COMMUNICATIONS,2022,13(1):6.
APA	王晶,姜萍,袁福平,&武晓雷.(2022).Chemical medium-range order in a medium-entropy alloy.NATURE COMMUNICATIONS,13(1),6.
MLA	王晶,et al."Chemical medium-range order in a medium-entropy alloy".NATURE COMMUNICATIONS 13.1(2022):6.