| Quantitative analysis of the yield behavior of a < 1 1 1 >/2 screw dislocation in alpha-iron | |
| Xia, Z. Y.1,2; Zhang, Z. J.1; 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) |
| 2018-06-01 | |
| Source Publication | COMPUTATIONAL MATERIALS SCIENCE
 |
| ISSN | 0927-0256 |
| Volume | 148Pages:207-215 |
| Abstract | In previous work, bond-order potentials (BOPS) have been used to establish a general yield criterion, different from the Schmid law, for the glide of < 1 1 1 >/2 screw dislocations on {1 1 0} planes in body-centered cubic metals, while their applications are restricted to the 2D simulations at 0 K because of their low computational efficiency. On the other hand, embedded-atom-method (EAM) potentials have been generally employed for long dislocation segments at finite temperatures, but there is no study to clarify whether or not they can reproduce the yield criteria revealed by the BOPs. In this work, systematic atomistic simulations with an EAM potential have been performed to calculate the behaviors of < 1 1 1 >/2 screw dislocations in alpha-iron under different loading conditions. We find that at 0 K, the simulation results can be well explained by the general yield criterion when the glide is restricted to {1 1 0} planes. Under uniaxial loadings, the activated slip systems are consistent with the experimental observations. At finite temperatures, as a preliminary attempt, the influence of the non-glide stress on the slip planes is presented, which could not be rationalized by the yield criterion at 0 K because extra effect from temperatures has come into the picture. (C) 2018 Elsevier B.V. All rights reserved. |
| Keyword | Body centered cubic Screw dislocations Core structure Non-glide stresses |
| 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.commatsci.2018.02.035 |
| 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)[51331007] ; National Natural Science Foundation of China (NSFC)[51571198] ; National Natural Science Foundation of China (NSFC)[51501197] ; National Natural Science Foundation of China (NSFC)[51771206] ; National Natural Science Foundation of China (NSFC)[51401207] |
| WOS Research Area | Materials Science |
| WOS Subject | Materials Science, Multidisciplinary |
| WOS ID | WOS:000428907600023 |
| Publisher | ELSEVIER SCIENCE BV |
| Citation statistics | |
| Document Type | 期刊论文 |
| Identifier | http://ir.imr.ac.cn/handle/321006/127721 |
| Collection | 中国科学院金属研究所 |
| Corresponding Author | Yang, J. B.; Zhang, Z. F. |
| Affiliation | 1.Chinese Acad Sci, Shenyang Natl Lab Mat Sci, Inst Met Res, 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 | Xia, Z. Y.,Zhang, Z. J.,Yang, J. B.,et al. Quantitative analysis of the yield behavior of a < 1 1 1 >/2 screw dislocation in alpha-iron[J]. COMPUTATIONAL MATERIALS SCIENCE,2018,148:207-215. |
| APA | Xia, Z. Y.,Zhang, Z. J.,Yang, J. B.,&Zhang, Z. F..(2018).Quantitative analysis of the yield behavior of a < 1 1 1 >/2 screw dislocation in alpha-iron.COMPUTATIONAL MATERIALS SCIENCE,148,207-215. |
| MLA | Xia, Z. Y.,et al."Quantitative analysis of the yield behavior of a < 1 1 1 >/2 screw dislocation in alpha-iron".COMPUTATIONAL MATERIALS SCIENCE 148(2018):207-215. |
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