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Structural and bonding transformation of Al-o.67CrCoCuFeNi high-entropy alloys during quenching
Zhang K(张坤); Pan SP; Tang WQ; Zhang YT; Wei BC(魏炳忱)
Source PublicationJOURNAL OF ALLOYS AND COMPOUNDS
2018-07-15
Volume753Pages:636-641
ISSN0925-8388
AbstractStructural and bonding transformation of the Al-o.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. (C) 2018 Elsevier B.V. All rights reserved.
KeywordHigh-entropy alloys Phase transformation Bonding characteristic
DOI10.1016/j.jallcom.2018.04.252
URL查看原文
Indexed BySCI ; EI
Language英语
WOS IDWOS:000432674100078
WOS KeywordMOLECULAR-DYNAMICS SIMULATION ; MECHANICAL-PROPERTIES ; PHASE-STABILITY ; DEFORMATION ; MICROSTRUCTURE ; BEHAVIOR ; SILICON ; SYSTEM ; GROWTH ; FCC
WOS Research AreaChemistry, Physical ; Materials Science, Multidisciplinary ; Metallurgy & Metallurgical Engineering
WOS SubjectChemistry ; Materials Science ; Metallurgy & Metallurgical Engineering
Funding OrganizationNational Natural Science Foundation of China [51401028, 51271193, 11402277, 11790292] ; Strategic Priority Research Program of the Chinese Academy of Sciences [XDB22040303]
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Document Type期刊论文
Identifierhttp://dspace.imech.ac.cn/handle/311007/78524
Collection国家微重力实验室
Affiliation1.Chinese Acad Sci, Inst Mech, Key Lab Micrograv, Natl Micrograv Lab, Beijing 100190, Peoples R China
2.Univ Chinese Acad Sci, Sch Engn Sci, Beijing 101408, Peoples R China
3.Taiyuan Univ Technol, Coll Mat Sci & Engn, Taiyuan 030024, Peoples R China
Recommended Citation
GB/T 7714
Zhang K,Pan SP,Tang WQ,et al. Structural and bonding transformation of Al-o.67CrCoCuFeNi high-entropy alloys during quenching[J]. JOURNAL OF ALLOYS AND COMPOUNDS,2018,753:636-641.
APA 张坤,Pan SP,Tang WQ,Zhang YT,&魏炳忱.(2018).Structural and bonding transformation of Al-o.67CrCoCuFeNi high-entropy alloys during quenching.JOURNAL OF ALLOYS AND COMPOUNDS,753,636-641.
MLA 张坤,et al."Structural and bonding transformation of Al-o.67CrCoCuFeNi high-entropy alloys during quenching".JOURNAL OF ALLOYS AND COMPOUNDS 753(2018):636-641.
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