Shear localization in dynamic deformation of copper single crystals
文献类型：期刊论文
| 作者 | S. X. Li ; R. Q. Yang ; J. W. Li ; Z. F. Zhang |
| 刊名 | Philosophical Magazine
 |
| 出版日期 | 2006 |
| 卷号 | 86期号:36页码:5769-5786 |
| 关键词 | persistent slip bands electron channeling contrast low-amplitude fatigue dislocation-structures cyclic deformation strain-rate fcc crystals behavior evolution polycrystals |
| ISSN号 | 1478-6435 |
| 中文摘要 | Dynamic deformation of copper single crystals, especially of fatigued copper single crystals with different orientations, was conducted on a split-Hopkinson pressure bar apparatus. The strain rates were in the range 2 - 9 x 10(3) s(-1). After dynamic deformation, the adiabatic shear bands (ASBs) were examined in a light microscope and SEM. The width and spacing of ASBs formed under different strain rates in a fatigued copper single crystal were measured and the spacing of ASBs is one-order of magnitude smaller than the theoretical predictions. The possible reasons for the discrepancy were discussed. The critical strains for the ASB formation in four different orientated single crystals at stain rate of about 4 x 10(3) s(-1) were determined by examining the post-deformation specimens and dynamic stress-strain curves. It is clearly indicated that the critical strains for the ASB formation are orientation-dependent in copper single crystals. A simple microscopic mechanism for ASB formation in fatigued single crystals was proposed. |
| 原文出处 | |
| 公开日期 | 2012-04-13 |
| 源URL | [http://ir.imr.ac.cn/handle/321006/34310]  |
| 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. X. Li,R. Q. Yang,J. W. Li,et al. Shear localization in dynamic deformation of copper single crystals[J]. Philosophical Magazine,2006,86(36):5769-5786. |
| APA | S. X. Li,R. Q. Yang,J. W. Li,&Z. F. Zhang.(2006).Shear localization in dynamic deformation of copper single crystals.Philosophical Magazine,86(36),5769-5786. |
| MLA | S. X. Li,et al."Shear localization in dynamic deformation of copper single crystals".Philosophical Magazine 86.36(2006):5769-5786. |
入库方式： OAI收割
来源：金属研究所
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