Effects of stacking fault energy, strain rate and temperature on microstructure and strength of nano structured Cu-Al alloys subjected to plastic deformation
文献类型：期刊论文
| 作者 | Y. Zhang ; N. R. Tao ; K. Lu |
| 刊名 | Acta Materialia
 |
| 出版日期 | 2011 |
| 卷号 | 59期号:15页码:6048-6058 |
| 关键词 | Cu-Al alloys Stacking fault energy Plastic deformation Nanostructures Mechanical properties high-pressure torsion mechanical attrition treatment ultrafine-grained metals nanostructured metals nanocrystalline cu tensile properties dynamic recovery surface-layer scale twins copper |
| ISSN号 | 1359-6454 |
| 中文摘要 | Nanostructured Cu-Al alloys with different stacking fault energies (SFEs) corresponding to Al concentrations in a range of 0 4.5 wt.% are prepared by means of plastic deformation. Effects of SFE, strain rate and temperature on microstructure characteristics and strength have been systematically investigated in the Cu-Al alloys. It was found that the deformation occurs mainly by twinning at the nanoscale in all samples subjected to dynamic plastic deformation at liquid nitrogen temperature. In the quasi-static compression process at room temperature, dislocation slip dominates the plastic deformation when the SFE is higher than 50 mJ m(-2). With decreasing SFE, twinning becomes the dominant deformation mechanism. A map of deformation modes and corresponding strain-induced microstructures is drawn in the SFE-processing parameters space for the Cu-Al alloys. In both sets of deformation mode, twinning is obviously enhanced by decreasing the SFE, resulting in smaller twin/matrix (T/M) lamella thickness and grain sizes. Consequently, an obvious strength elevation is induced by the size effects of grains and T/M lamellae with lower SFEs. (C) 2011 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved. |
| 原文出处 | |
| 公开日期 | 2012-04-13 |
| 源URL | [http://210.72.142.130/handle/321006/30927]  |
| 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 | Y. Zhang,N. R. Tao,K. Lu. Effects of stacking fault energy, strain rate and temperature on microstructure and strength of nano structured Cu-Al alloys subjected to plastic deformation[J]. Acta Materialia,2011,59(15):6048-6058. |
| APA | Y. Zhang,N. R. Tao,&K. Lu.(2011).Effects of stacking fault energy, strain rate and temperature on microstructure and strength of nano structured Cu-Al alloys subjected to plastic deformation.Acta Materialia,59(15),6048-6058. |
| MLA | Y. Zhang,et al."Effects of stacking fault energy, strain rate and temperature on microstructure and strength of nano structured Cu-Al alloys subjected to plastic deformation".Acta Materialia 59.15(2011):6048-6058. |
入库方式： OAI收割
来源：金属研究所
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