Influence of lattice distortion on stacking fault energies of CoCrFeNi and Al-CoCrFeNi high entropy alloys
文献类型：期刊论文
| 作者 | Qiu, Shi1,5; Zhang, Xue-Chun2; Zhou, Jian1,5; Cao, Shuo2; Yu, Hui2,3,4; Hu, Qing-Miao2; Sun, Zhimei1,5 |
| 刊名 | JOURNAL OF ALLOYS AND COMPOUNDS
 |
| 出版日期 | 2020-12-15 |
| 卷号 | 846页码:10 |
| 关键词 | High entropy alloys Stacking fault energy Lattice distortion Density functional theory |
| ISSN号 | 0925-8388 |
| DOI | 10.1016/j.jallcom.2020.156321 |
| 通讯作者 | Hu, Qing-Miao(qmhu@imr.ac.cn) ; Sun, Zhimei(zmsun@buaa.edu.cn) |
| 英文摘要 | 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. |
| 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 |
| 语种 | 英语 |
| WOS记录号 | WOS:000568826500001 |
| 出版者 | ELSEVIER SCIENCE SA |
| 资助机构 | National Key Research and Development Program of China ; National Natural Science Foundation of China |
| 源URL | [http://ir.imr.ac.cn/handle/321006/140510]  |
| 专题 | 金属研究所_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.Chinese Acad Sci, Inst Met Res, Wenhua Rd 72, Shenyang 110016, Peoples R China 3.Northeastern Univ, Sch Mat Sci & Engn, Key Lab Anisotropy & Texture Mat, Minist Educ, Shenyang 110819, Peoples R China 4.Shen Yang Univ Technol, Shenyang 110870, Peoples R China 5.Beihang Univ, Ctr Integrated Computat Mat Engn, Int Res Inst Multidisciplinary Sci, Beijing 100191, 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. |
入库方式： OAI收割
来源：金属研究所
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