Superplasticity and deformation mechanisms in NiAl(-Mo) alloy
文献类型：期刊论文
| 作者 | X. H. Du ; J. T. Guo ; L. Z. Zhou |
| 刊名 | Materials Science and Technology
 |
| 出版日期 | 2004 |
| 卷号 | 20期号:1页码:82-86 |
| 关键词 | NiAl-9Mo superplasticity deformation mechanism microstructure dislocation activity arrangement state zn |
| ISSN号 | 0267-0836 |
| 中文摘要 | The mechanical behaviour and microstructural evolution in tension of NiAl-9Mo eutectic alloy at 1100degreesC and strain rates from 10(-5) to 10(-3) s(-1) have been investigated. High values of strain rate sensitivity index, but relatively small elongations between 150 and 200%, have been observed. Tensile specimens with various strains were quenched in water to preserve the dislocation structures for TEM examination. The TEM results show that the dislocation configuration and density change significantly with an increase in strain rate, and therefore correspond to different deformation mechanisms. At a low strain rate (5(.)5 x 10(-5) s(-1)), the dislocation density is relatively low and dislocation activity is regarded as an accommodation mechanism for grain boundary sliding. In contrast, the high density of dislocations as well as clear subboundaries observed in grains at a high strain rate (5(.)5 x 10(-4) s(-1)) suggest that the dislocations are active directly in response to the applied stress as well as participating in the relaxation process of grain boundary sliding by subboundary formation. Thus, grain boundary sliding is mainly responsible for superplastic deformation at a low strain rate, while superlastic deformation at a high strain rate is controlled by the combined operation of both grain boundary sliding and dynamic recovery. |
| 原文出处 | |
| 公开日期 | 2012-04-14 |
| 源URL | [http://ir.imr.ac.cn/handle/321006/35353]  |
| 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. H. Du,J. T. Guo,L. Z. Zhou. Superplasticity and deformation mechanisms in NiAl(-Mo) alloy[J]. Materials Science and Technology,2004,20(1):82-86. |
| APA | X. H. Du,J. T. Guo,&L. Z. Zhou.(2004).Superplasticity and deformation mechanisms in NiAl(-Mo) alloy.Materials Science and Technology,20(1),82-86. |
| MLA | X. H. Du,et al."Superplasticity and deformation mechanisms in NiAl(-Mo) alloy".Materials Science and Technology 20.1(2004):82-86. |
入库方式： OAI收割
来源：金属研究所
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