Determining the minimum grain size in severe plastic deformation process via first-principles calculations
文献类型：期刊论文
| 作者 | S. Lu ; Q. M. Hu ; E. K. Delczeg-Czirjak ; B. Johansson ; L. Vitos |
| 刊名 | Acta Materialia
 |
| 出版日期 | 2012 |
| 卷号 | 60期号:11页码:4506-4513 |
| ISSN号 | 1359-6454 |
| 关键词 | Minimum grain size Stacking fault energy First-principles theory Severe plastic deformation stacking-fault energy austenitic stainless-steels cu-al alloys electronic topological transitions channel-angular-extrusion metallic random alloys high-pressure torsion copper-nickel-alloys pd-ag alloys mechanical-properties |
| 中文摘要 | Although the stacking fault energy (SFE) is a fundamental variable determining the minimum grain size (d(min)) obtainable in severe plastic deformation (SPD) processes, its accurate measurement is difficult. Here we establish the SFEs of binary Pd-Ag, Pd-Cu, Pt-Cu and Ni-Cu solid solutions using the axial interaction model and the supercell model in combination with first-principles theory. The two models yield consistent formation energies. For Pd-Ag, Pd-Cu and Ni-Cu, the theoretical SFEs agree well with those from the experimental measurements. For Pt-Cu no experimental results are available, and thus our calculated SFEs represent the first reasonable predictions. We discuss the correlation of the SFE and d(min), in SPD experiments and show that the d(min) values can be evaluated from first-principles calculations. (C) 2012 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved. |
| 原文出处 | |
| 公开日期 | 2013-02-05 |
| 源URL | [http://ir.imr.ac.cn/handle/321006/60139]  |
| 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 | S. Lu,Q. M. Hu,E. K. Delczeg-Czirjak,et al. Determining the minimum grain size in severe plastic deformation process via first-principles calculations[J]. Acta Materialia,2012,60(11):4506-4513. |
| APA | S. Lu,Q. M. Hu,E. K. Delczeg-Czirjak,B. Johansson,&L. Vitos.(2012).Determining the minimum grain size in severe plastic deformation process via first-principles calculations.Acta Materialia,60(11),4506-4513. |
| MLA | S. Lu,et al."Determining the minimum grain size in severe plastic deformation process via first-principles calculations".Acta Materialia 60.11(2012):4506-4513. |
入库方式： OAI收割
来源：金属研究所
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