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Influence of lattice distortion on stacking fault energies of CoCrFeNi and Al-CoCrFeNi high entropy alloys
Qiu, Shi1,2; Zhang, Xue-Chun3; Zhou, Jian1,2; Cao, Shuo3; Yu, Hui3,4,5; Hu, Qing-Miao3; Sun, Zhimei1,2
Corresponding AuthorHu, Qing-Miao(qmhu@imr.ac.cn) ; Sun, Zhimei(zmsun@buaa.edu.cn)
2020-12-15
Source PublicationJOURNAL OF ALLOYS AND COMPOUNDS
ISSN0925-8388
Volume846Pages:10
AbstractThe stacking fault energy (SFE) plays an important role in the deformation mode selection and consequently the mechanical properties of high entropy alloys. In the present work, the SFEs of face-centered cubic (fcc) CoCrFeNi and Al0.57CoCrFeNi HEAs are calculated by using first-principles calculations. The influence of the local lattice distortion (LLD) on the SFE is explored. We show that the addition of Al to CoCrFeNi alloy increases the intrinsic SFE (ISFE, gamma(isf)) but decreases the unstable SFE (USFE, gamma(usf)) such that the energy barrier (gamma(usf) - gamma(isf)) for the < 11 (2) over bar >(111) slip decreases. The lattice distortion contributes significantly to the ISFE but has limited influence on the USFE, leading to decline of the slip energy barriers of both alloys. The ISFE and slip energy barrier differences between the two alloys are enhanced by the lattice distortion. Based on the calculated ISFE and slip energy barrier, the effects of Al alloying and lattice distortion on the mechanical properties of CoCrNiFe HEA are discussed. (C) 2020 Published by Elsevier B.V.
KeywordHigh entropy alloys Stacking fault energy Lattice distortion Density functional theory
Funding OrganizationNational Key Research and Development Program of China ; National Natural Science Foundation of China
DOI10.1016/j.jallcom.2020.156321
Indexed BySCI
Language英语
Funding ProjectNational Key Research and Development Program of China[2017YFB0701700] ; National Natural Science Foundation of China[51872017]
WOS Research AreaChemistry ; Materials Science ; Metallurgy & Metallurgical Engineering
WOS SubjectChemistry, Physical ; Materials Science, Multidisciplinary ; Metallurgy & Metallurgical Engineering
WOS IDWOS:000568826500001
PublisherELSEVIER SCIENCE SA
Citation statistics
Cited Times:6[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.imr.ac.cn/handle/321006/140511
Collection中国科学院金属研究所
Corresponding AuthorHu, Qing-Miao; Sun, Zhimei
Affiliation1.Beihang Univ, Sch Mat Sci & Engn, Int Res Inst Multidisciplinary Sci, Beijing 100191, Peoples R China
2.Beihang Univ, Ctr Integrated Computat Mat Engn, Int Res Inst Multidisciplinary Sci, Beijing 100191, Peoples R China
3.Chinese Acad Sci, Inst Met Res, Wenhua Rd 72, Shenyang 110016, Peoples R China
4.Northeastern Univ, Sch Mat Sci & Engn, Key Lab Anisotropy & Texture Mat, Minist Educ, Shenyang 110819, Peoples R China
5.Shen Yang Univ Technol, Shenyang 110870, Peoples R China
Recommended Citation
GB/T 7714
Qiu, Shi,Zhang, Xue-Chun,Zhou, Jian,et al. Influence of lattice distortion on stacking fault energies of CoCrFeNi and Al-CoCrFeNi high entropy alloys[J]. JOURNAL OF ALLOYS AND COMPOUNDS,2020,846:10.
APA Qiu, Shi.,Zhang, Xue-Chun.,Zhou, Jian.,Cao, Shuo.,Yu, Hui.,...&Sun, Zhimei.(2020).Influence of lattice distortion on stacking fault energies of CoCrFeNi and Al-CoCrFeNi high entropy alloys.JOURNAL OF ALLOYS AND COMPOUNDS,846,10.
MLA Qiu, Shi,et al."Influence of lattice distortion on stacking fault energies of CoCrFeNi and Al-CoCrFeNi high entropy alloys".JOURNAL OF ALLOYS AND COMPOUNDS 846(2020):10.
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