Formation of chemical short-range orders of two kinds and the co-existence with medium-range orders in an equiatomic VFeCoNi alloy

doi:10.1016/j.intermet.2023.107896

IMECH-IR > 非线性力学国家重点实验室

	Formation of chemical short-range orders of two kinds and the co-existence with medium-range orders in an equiatomic VFeCoNi alloy
	Zhu ML(朱鸣柳); Wang J(王晶); Jiang P(姜萍); Yuan FP(袁福平); Wu XL(武晓雷)
发表期刊	INTERMETALLICS
	2023-06
卷号	158 页码:107896
ISSN	0966-9795
摘要	The chemical short-range orders (CSROs) have aroused the growing concern in the emerging multi-principalelement alloys. The CSROs as the built-in nanoscale heterogeneities cause the difference in the microstructures from conventional alloys and are expected to have an effect on mechanical properties. The formation of CSROs relates to elemental species and recent verifications of CSROs are mainly in ternary alloys. Here, the CSROs are investigated in an as-annealed, quaternary, and equiatomic VFeCoNi alloy of face-centered cubicstructured single phase before and after tensile deformation. Both the lattice structure and elemental species occupation are investigated in detail by means of electron diffraction, dark-field imaging, and atomic-resolution chemical mapping in a high-resolution transmission electron microscope. The CSROs are characterized crystallographically by two M (M: specific element)-enriched planes to sandwich one M-depleted plane. Particularly, M can be either V or Fe, instead of single elemental species reported previously. This indicates that two kinds of CSROs have been simultaneously formed in terms of the elemental species occupation, while both having the same lattice structure. Further, these two kinds of CSROs may grow up into the medium-range orders in sizes larger than 1 nm. Meanwhile, both short- and medium-range orders are mechanically stable during tensile deformation to maintain an almost unchangeable average sizes and areal fractions as well. The Moran's index analyses predict the presence of more V-enriched CSROs and CMROs than Fe-enriched ones. The present results provide the insights into understanding the production of CSROs and their growth as a result of the complex and diverse chemical species in the multi-principal-element alloys.
关键词	Chemical short-range order Multi -principal -element alloys High -entropy alloys Mechanical stability Microstructure Mechanical property
DOI	10.1016/j.intermet.2023.107896
收录类别	SCI ; EI
语种	英语
WOS记录号	WOS:000967359100001
项目资助者	National Key R&D Program of China ; MOST [2019YFA0209900] ; National Natural Science Foundation of China [11988102, 11972350]
论文分区	二类/Q1
力学所作者排名	1
RpAuthor	Wu, XL
引用统计	被引频次：1[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/311007/92251
专题	非线性力学国家重点实验室
作者单位	1.(Zhu Mingliu, Wang Jing, Jiang Ping, Yuan Fuping, Wu Xiaolei) Chinese Acad Sci Inst Mech State Key Lab Nonlinear Mech Beijing 100190 Peoples R China 2.(Yuan Fuping, Wu Xiaolei) Univ Chinese Acad Sci Sch Engn Sci Beijing 100049 Peoples R China
推荐引用方式 GB/T 7714	Zhu ML,Wang J,Jiang P,et al. Formation of chemical short-range orders of two kinds and the co-existence with medium-range orders in an equiatomic VFeCoNi alloy[J]. INTERMETALLICS,2023,158:107896.
APA	朱鸣柳,王晶,姜萍,袁福平,&武晓雷.(2023).Formation of chemical short-range orders of two kinds and the co-existence with medium-range orders in an equiatomic VFeCoNi alloy.INTERMETALLICS,158,107896.
MLA	朱鸣柳,et al."Formation of chemical short-range orders of two kinds and the co-existence with medium-range orders in an equiatomic VFeCoNi alloy".INTERMETALLICS 158(2023):107896.

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