| Pressure effect on core structures and yield behaviors of < 111 > screw superdislocations in FeAl | |
| Yan, J. X.1,2; Zhang, Z. J.1; Li, K. Q.1,2; Xia, Z. Y.1,2; Yang, J. B.1,2; Zhang, Z. F.1,2 | |
| Corresponding Author | Yang, J. B.(jbyang@imr.ac.cn) ; Zhang, Z. F.(zhfzhang@imr.ac.cn) |
| 2020-01-30 | |
| Source Publication | JOURNAL OF ALLOYS AND COMPOUNDS
 |
| ISSN | 0925-8388 |
| Volume | 815Pages:9 |
| Abstract | The core structure and the mobility of [111] screw superdislocations are investigated under hydrostatic pressures by comprehensive atomic simulations in B2-FeAl. The pressure dependence of elastic constants and lattice parameter of FeAl is also revealed. The result indicates that the [111] screw super-dislocation dissociates on the (1 (1) over bar0) plane under different pressures, and the separation increases with the decrease of external pressures. It is interesting to find that the consecutive transformation of core configurations takes place under different pressures. The quantitative analysis confirms that the core transformation is determined by the system energy optimization. Furthermore, the simulation results demonstrate that the operation of < 111 > {112} and < 111 > {110} slip systems and the corresponding yield stresses of dissociated screw superdislocations have strong dependence on the variation of external pressures. (C) 2019 Elsevier B.V. All rights reserved. |
| Keyword | Molecular dynamics simulations Dislocations and disclinations Yield stress Elastic properties High-pressure Intermetallics |
| Funding Organization | Program of One Hundred Talented People of the Chinese Academy of Sciences ; National Natural Science Foundation of China (NSFC) |
| DOI | 10.1016/j.jallcom.2019.152362 |
| Indexed By | SCI |
| Language | 英语 |
| Funding Project | Program of One Hundred Talented People of the Chinese Academy of Sciences ; National Natural Science Foundation of China (NSFC)[51571198] ; National Natural Science Foundation of China (NSFC)[51771206] |
| WOS Research Area | Chemistry ; Materials Science ; Metallurgy & Metallurgical Engineering |
| WOS Subject | Chemistry, Physical ; Materials Science, Multidisciplinary ; Metallurgy & Metallurgical Engineering |
| WOS ID | WOS:000502521900060 |
| Publisher | ELSEVIER SCIENCE SA |
| Citation statistics | |
| Document Type | 期刊论文 |
| Identifier | http://ir.imr.ac.cn/handle/321006/136332 |
| Collection | 中国科学院金属研究所 |
| Corresponding Author | Yang, J. B.; Zhang, Z. F. |
| Affiliation | 1.Chinese Acad Sci, Inst Met Res, Lab Fatigue & Fracture Mat, Shenyang 110016, Liaoning, Peoples R China 2.Univ Sci & Technol China, Sch Mat Sci & Engn, Hefei 230026, Anhui, Peoples R China |
| Recommended Citation GB/T 7714 | Yan, J. X.,Zhang, Z. J.,Li, K. Q.,et al. Pressure effect on core structures and yield behaviors of < 111 > screw superdislocations in FeAl[J]. JOURNAL OF ALLOYS AND COMPOUNDS,2020,815:9. |
| APA | Yan, J. X.,Zhang, Z. J.,Li, K. Q.,Xia, Z. Y.,Yang, J. B.,&Zhang, Z. F..(2020).Pressure effect on core structures and yield behaviors of < 111 > screw superdislocations in FeAl.JOURNAL OF ALLOYS AND COMPOUNDS,815,9. |
| MLA | Yan, J. X.,et al."Pressure effect on core structures and yield behaviors of < 111 > screw superdislocations in FeAl".JOURNAL OF ALLOYS AND COMPOUNDS 815(2020):9. |
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