Influence of lattice distortion on stacking fault energies of CoCrFeNi and Al-CoCrFeNi high entropy alloys

doi:10.1016/j.jallcom.2020.156321

IMR OpenIR

	Influence of lattice distortion on stacking fault energies of CoCrFeNi and Al-CoCrFeNi high entropy alloys
	Qiu, Shi 1,2; Zhang, Xue-Chun 3; Zhou, Jian 1,2; Cao, Shuo 3; Yu, Hui 3,4,5; Hu, Qing-Miao 3; Sun, Zhimei 1,2
通讯作者	Hu, Qing-Miao(qmhu@imr.ac.cn) ; Sun, Zhimei(zmsun@buaa.edu.cn)
	2020-12-15
发表期刊	JOURNAL OF ALLOYS AND COMPOUNDS
ISSN	0925-8388
卷号	846 页码:10
摘要	The 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.
关键词	High entropy alloys Stacking fault energy Lattice distortion Density functional theory
资助者	National Key Research and Development Program of China ; National Natural Science Foundation of China
DOI	10.1016/j.jallcom.2020.156321
收录类别	SCI
语种	英语
资助项目	National Key Research and Development Program of China[2017YFB0701700] ; National Natural Science Foundation of China[51872017]
WOS研究方向	Chemistry ; Materials Science ; Metallurgy & Metallurgical Engineering
WOS类目	Chemistry, Physical ; Materials Science, Multidisciplinary ; Metallurgy & Metallurgical Engineering
WOS记录号	WOS:000568826500001
出版者	ELSEVIER SCIENCE SA
引用统计	被引频次：60[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://ir.imr.ac.cn/handle/321006/140511
专题	中国科学院金属研究所
通讯作者	Hu, Qing-Miao; Sun, Zhimei
作者单位	1.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
推荐引用方式 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.