The effect of alloying elements on the dislocation climbing velocity in Ni: A first-principles study
文献类型：期刊论文
| 作者 | X. X. Yu ; C. Y. Wang |
| 刊名 | Acta Materialia
 |
| 出版日期 | 2009 |
| 卷号 | 57期号:19页码:5914-5920 |
| 关键词 | Dislocation dynamics Nickel alloys First-principle electron theory high-temperature creep single-crystal superalloys stacking-fault energy augmented-wave method atom-probe nickel points |
| ISSN号 | 1359-6454 |
| 中文摘要 | By using density functional theory calculations in conjunction with the climbing images nudged elastic band method, the effects of alloying elements Re, W, Mo, Cr, Co and Ru on the velocity of dislocation climbing in gamma Ni were studied. The results shed a light on the mechanism of these elements suppressing the dislocation motion by connecting the stacking fault energy and the migration activation energy of vacancy with the dislocation climbing velocity. It is found that the elements can decrease the stacking fault energy of Ni and raise the migration activation energy of vacancy. The changes of these two energies result in the increase of the formation energy and the diffusion activation energy of the jog, thus the dislocation climbing is restricted. The results also reveal that the influences of alloying elements on dislocation climbing velocity depend on the characters of dislocations. Crown Copyright (C) 2009 Published by Elsevier Ltd. on behalf of Acta Materialia Inc. All rights reserved. |
| 原文出处 | |
| 公开日期 | 2012-04-13 |
| 源URL | [http://210.72.142.130/handle/321006/32516]  |
| 专题 | 金属研究所_中国科学院金属研究所 |
| 推荐引用方式 GB/T 7714 | X. X. Yu,C. Y. Wang. The effect of alloying elements on the dislocation climbing velocity in Ni: A first-principles study[J]. Acta Materialia,2009,57(19):5914-5920. |
| APA | X. X. Yu,&C. Y. Wang.(2009).The effect of alloying elements on the dislocation climbing velocity in Ni: A first-principles study.Acta Materialia,57(19),5914-5920. |
| MLA | X. X. Yu,et al."The effect of alloying elements on the dislocation climbing velocity in Ni: A first-principles study".Acta Materialia 57.19(2009):5914-5920. |
入库方式： OAI收割
来源：金属研究所
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