| 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 Author | Hu, Qing-Miao(qmhu@imr.ac.cn) ; Sun, Zhimei(zmsun@buaa.edu.cn) |
| 2020-12-15 | |
| Source Publication | JOURNAL OF ALLOYS AND COMPOUNDS
 |
| ISSN | 0925-8388 |
| Volume | 846Pages:10 |
| Abstract | 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. |
| Keyword | High entropy alloys Stacking fault energy Lattice distortion Density functional theory |
| Funding Organization | National Key Research and Development Program of China ; National Natural Science Foundation of China |
| DOI | 10.1016/j.jallcom.2020.156321 |
| Indexed By | SCI |
| Language | 英语 |
| Funding Project | National Key Research and Development Program of China[2017YFB0701700] ; National Natural Science Foundation of China[51872017] |
| WOS Research Area | Chemistry ; Materials Science ; Metallurgy & Metallurgical Engineering |
| WOS Subject | Chemistry, Physical ; Materials Science, Multidisciplinary ; Metallurgy & Metallurgical Engineering |
| WOS ID | WOS:000568826500001 |
| Publisher | ELSEVIER SCIENCE SA |
| Citation statistics | |
| Document Type | 期刊论文 |
| Identifier | http://ir.imr.ac.cn/handle/321006/140511 |
| Collection | 中国科学院金属研究所 |
| Corresponding Author | Hu, Qing-Miao; Sun, Zhimei |
| Affiliation | 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 |
| 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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