Evolution of thermoplastic shear localization and related microstructures in Awl/SiCp composites under dynamic compression
文献类型：期刊论文
| 作者 | X. B. Xu ; Z. Ling ; X. Wu ; Y. L. Bai |
| 刊名 | Journal of Materials Science & Technology
 |
| 出版日期 | 2002 |
| 卷号 | 18期号:6页码:504-508 |
| 关键词 | Al/SiCp composites shear localization recrystallization dislocations band formation deformation recrystallization alloy |
| ISSN号 | 1005-0302 |
| 中文摘要 | The localized shear deformation in the 2024 and 2124 Al matrix composites reinforced with SiC particles was investigated with a split Hopkinson pressure bar (SHPB) at a strain rate of about 2.0x10(3) s(-1). The results showed that the occurrence of localized shear deformation is sensitive to the size of SiC particles. It was found that the critical strain, at which the shear localization occurs, strongly depends on the size and volume fraction of SiC particles. The smaller the particle size, the lower the critical strain required for the shear localization. TEM examinations revealed that Al/SiCp interfaces are the main sources of dislocations. The dislocation density near the interface was found to be high and it decreases with the distance from the particles. The Al matrix in shear bands was highly deformed and severely elongated at low angle boundaries. The Al/SiCp interfaces, particularly the sharp corners of SiC particles, provide the sites for microcrack initiation. Eventual fracture is caused by the growth and coalescence of microcracks along the shear bands. It is proposed that the distortion free equiaxed grains with low dislocation density observed in the center of shear band result from recrystallization during dynamic deformation. |
| 原文出处 | |
| 公开日期 | 2012-04-14 |
| 源URL | [http://ir.imr.ac.cn/handle/321006/36477]  |
| 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. B. Xu,Z. Ling,X. Wu,et al. Evolution of thermoplastic shear localization and related microstructures in Awl/SiCp composites under dynamic compression[J]. Journal of Materials Science & Technology,2002,18(6):504-508. |
| APA | X. B. Xu,Z. Ling,X. Wu,&Y. L. Bai.(2002).Evolution of thermoplastic shear localization and related microstructures in Awl/SiCp composites under dynamic compression.Journal of Materials Science & Technology,18(6),504-508. |
| MLA | X. B. Xu,et al."Evolution of thermoplastic shear localization and related microstructures in Awl/SiCp composites under dynamic compression".Journal of Materials Science & Technology 18.6(2002):504-508. |
入库方式： OAI收割
来源：金属研究所
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