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Title:
Structural and bonding transformation of Al0.67CrCoCuFeNi high-entropy alloys during quenching
Author: Zhang K(张坤); Pan SP; Tang WQ; Zhang YT; Wei BC(魏炳忱)
Source: Journal of Alloys and Compounds
Issued Date: 2018-04
Volume: 753, Pages:636-641
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.

Keyword: High-entropy alloysPhase transformationBonding characteristic
Language: 英语
Indexed Type: SCI
Corresponding Author: 魏炳忱
DOI: 10.1016/j.jallcom.2018.04.252
WOS Subject Extended: Chemistry ; Materials Science ; Metallurgy & Metallurgical Engineering
WOS ID: WOS:000432674100078
ISSN: 0925-8388
Funder: National Natural Science Foundation of China(51401028 ; Strategic Priority Research Program of the Chinese Academy of Sciences(XDB22040303) ; 51271193 ; 11402277 ; 11790292)
Classification: 一类
Ranking: 1
Citation statistics:
Content Type: 期刊论文
URI: http://dspace.imech.ac.cn/handle/311007/73154
Appears in Collections:国家微重力实验室_期刊论文

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description.institution: 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

Recommended Citation:
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,2018-04-01,753:636-641.
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文件名: 2018-Structural and bonding transformation of Al0.67CrCoCuFeNi high-entropy alloys during quenching.pdf
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