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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)
Source PublicationJournal of Alloys and Compounds
2018-04
Volume753Pages:636-641
ISSN0925-8388
Abstract

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.

KeywordHigh-entropy Alloysphase Transformationbonding Characteristic
DOI10.1016/j.jallcom.2018.04.252
Indexed BySCI ; EI
Language英语
WOS IDWOS:000432674100078
WOS Research AreaChemistry ; Materials Science ; Metallurgy & Metallurgical Engineering
Funding OrganizationNational Natural Science Foundation of China(51401028 ; Strategic Priority Research Program of the Chinese Academy of Sciences(XDB22040303) ; 51271193 ; 11402277 ; 11790292)
Classification一类
Ranking1
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Document Type期刊论文
Identifierhttp://dspace.imech.ac.cn/handle/311007/73154
Collection国家微重力实验室
Corresponding AuthorWei BC(魏炳忱)
Affiliation1.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
Recommended Citation
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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