Shear localization and recrystallization in dynamic deformation of 8090 Al-Li alloy
文献类型：期刊论文
| 作者 | Y. B. Xu ; W. L. Zhong ; Y. J. Chen ; L. T. Shen ; Q. Liu ; Y. L. Bai ; M. A. Meyers |
| 刊名 | Materials Science and Engineering a-Structural Materials Properties Microstructure and Processing
 |
| 出版日期 | 2001 |
| 卷号 | 299期号:1-2页码:287-295 |
| 关键词 | shear localization recrystallization dynamic deformation 8090 Al-Li alloy transmission electron-microscopy strain-rate behavior adiabatic shear plastic-deformation band formation microstructure titanium temperature evolution steels |
| ISSN号 | 0921-5093 |
| 中文摘要 | The microstructural evolution in localized shear deformation was investigated in an 8090 Al-Li alloy by split Hopkinson pressure bar (strain rate of approximately 10(3) s(-1)) at ambient temperature and 77 K. The alloy was tested in the peak-, over-, under-, and natural-aged conditions, that provide a wide range of microstructural parameters and mechanical properties. Two types of localized shear bands were distinguished by optical microscopy: the deformed shear band and the white-etching shear band. They form at different stages of deformation during localization. There are critical strains for the occurrence of deformed and white-etching localized shear deformation, at the imposed strain rate. Observations by transmission electron microscopy reveal that the white-etching bands contain fine equiaxed grains; it is proposed that they are the result of recrystallization occurring during localization. The deformed-type bands are observed after testing at 77 K in all heat treatment conditions, but they are not as well defined as those developed at ambient temperature. Cracking often occurs along the localized shear at ambient temperature. The decrement in temperature is favorable for the nucleation, growth and coalescence of the microcracks along the shear bands, inducing fracture. (C) 2001 Elsevier Science B.V. All rights reserved. |
| 原文出处 | |
| 公开日期 | 2012-04-14 |
| 源URL | [http://ir.imr.ac.cn/handle/321006/36858]  |
| 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. B. Xu,W. L. Zhong,Y. J. Chen,et al. Shear localization and recrystallization in dynamic deformation of 8090 Al-Li alloy[J]. Materials Science and Engineering a-Structural Materials Properties Microstructure and Processing,2001,299(1-2):287-295. |
| APA | Y. B. Xu.,W. L. Zhong.,Y. J. Chen.,L. T. Shen.,Q. Liu.,...&M. A. Meyers.(2001).Shear localization and recrystallization in dynamic deformation of 8090 Al-Li alloy.Materials Science and Engineering a-Structural Materials Properties Microstructure and Processing,299(1-2),287-295. |
| MLA | Y. B. Xu,et al."Shear localization and recrystallization in dynamic deformation of 8090 Al-Li alloy".Materials Science and Engineering a-Structural Materials Properties Microstructure and Processing 299.1-2(2001):287-295. |
入库方式： OAI收割
来源：金属研究所
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