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Structural and bonding transformation of Al0.67CrCoCuFeNi high-entropy alloys during quenching
Zhang K(张坤); Pan SP; Tang WQ; Zhang YT; Wei BC(魏炳忱); Wei BC(魏炳忱)
2018-04
发表期刊Journal of Alloys and Compounds
卷号753页码:636-641
ISSN0925-8388
摘要

Structural and bonding transformation of the Al0.67CrCoFeNi high-entropy alloys (HEA) during quenching is investigated by molecular dynamics simulations. At a high cooling rate, some short-ranged ordered clusters, such as FCC, HCP and BCC crystalline clusters are already present in the almost amorphous HEAs. When the cooling rate decreases, the atoms become packed more orderly and ultimately form a nano-polycrystalline structure dominated by FCC structures. The BCC structures appear only as an intermediate state acting on the course of crystallization, while the HCP structure can be viewed as the precursor of the malposed FCC structure due to the identical first neighbor distances. In liquid HEAs, the low-symmetry and low-coordination bond pairs, either transform to high-symmetry and high-coordination 1551 bond pairs, or transform to 1(5,4)41 bond pairs for FCC structure and 1661 bond pairs for an HCP structure, depending on the cooling rates. This study will contribute to a better understanding of the essential phase change in HEAs.

关键词High-entropy Alloysphase Transformationbonding Characteristic
DOI10.1016/j.jallcom.2018.04.252
收录类别SCI
语种英语
WOS记录号WOS:000432674100078
WOS研究方向Chemistry ; Materials Science ; Metallurgy & Metallurgical Engineering
项目资助者National Natural Science Foundation of China(51401028 ; Strategic Priority Research Program of the Chinese Academy of Sciences(XDB22040303) ; 51271193 ; 11402277 ; 11790292)
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力学所作者排名1
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文献类型期刊论文
条目标识符http://dspace.imech.ac.cn/handle/311007/73154
专题国家微重力实验室
通讯作者Wei BC(魏炳忱)
作者单位1.Key Laboratory of Microgravity (National Microgravity Laboratory), Institute of Mechanics, Chinese Academy of Sciences, Beijing 100190, China
2.School of Engineering Science, University of Chinese Academy of Sciences, Beijing 101408, China
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GB/T 7714
Zhang K,Pan SP,Tang WQ,et al. Structural and bonding transformation of Al0.67CrCoCuFeNi high-entropy alloys during quenching[J]. Journal of Alloys and Compounds,2018,753:636-641.
APA Zhang K,Pan SP,Tang WQ,Zhang YT,Wei BC,&魏炳忱.(2018).Structural and bonding transformation of Al0.67CrCoCuFeNi high-entropy alloys during quenching.Journal of Alloys and Compounds,753,636-641.
MLA Zhang K,et al."Structural and bonding transformation of Al0.67CrCoCuFeNi high-entropy alloys during quenching".Journal of Alloys and Compounds 753(2018):636-641.
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