High Strain Rate Superplasticity in a Micro-grained Al-Mg-Sc Alloy with Predominant High Angle Grain Boundaries
文献类型：期刊论文
| 作者 | F. C. Liu ; Z. Y. Ma ; F. C. Zhang |
| 刊名 | Journal of Materials Science & Technology
 |
| 出版日期 | 2012 |
| 卷号 | 28期号:11页码:1025-1030 |
| 关键词 | Superplasticity Friction stir processing Aluminum Microstructure Friction stir welding low-temperature superplasticity severe plastic-deformation zr alloy 7075al alloy friction evolution behavior mechanisms |
| ISSN号 | 1005-0302 |
| 中文摘要 | Friction stir processing (FSP) was applied to extruded Al-Mg-Sc alloy to produce fine-grained microstructure with a grain size of 2.2 mu m. Electron backscatter diffraction (EBSD) result showed that the grain boundary misorientation distribution was very close to a random grain assembly for randomly oriented cubes. Superplastic investigations in the temperature range of 425-500 degrees C and strain rate range of 1x10(-2)-1x1(0) s(-1) showed that a maximum elongation of 1500% was achieved at 475 degrees C and a high strain rate of 1x10(-1) s(-1). The FSP Al-Mg-Sc exhibited enhanced superplastic deformation kinetics compared to that predicted by the constitutive relationship for superplasticity in fine-grained aluminum alloys. The origin for enhanced superplastic deformation kinetics in the FSP alloy can be attributed to its high fraction of high angle grain boundaries (HAGBs). The analyses of the superplastic data and scanning electron microscopy (SEM) examinations on the surfaces of deformed specimens indicated that grain boundary sliding is the main superplastic deformation mechanism for the FSP Al-Mg-Sc alloy. |
| 原文出处 | |
| 公开日期 | 2013-02-05 |
| 源URL | [http://ir.imr.ac.cn/handle/321006/60105]  |
| 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 | F. C. Liu,Z. Y. Ma,F. C. Zhang. High Strain Rate Superplasticity in a Micro-grained Al-Mg-Sc Alloy with Predominant High Angle Grain Boundaries[J]. Journal of Materials Science & Technology,2012,28(11):1025-1030. |
| APA | F. C. Liu,Z. Y. Ma,&F. C. Zhang.(2012).High Strain Rate Superplasticity in a Micro-grained Al-Mg-Sc Alloy with Predominant High Angle Grain Boundaries.Journal of Materials Science & Technology,28(11),1025-1030. |
| MLA | F. C. Liu,et al."High Strain Rate Superplasticity in a Micro-grained Al-Mg-Sc Alloy with Predominant High Angle Grain Boundaries".Journal of Materials Science & Technology 28.11(2012):1025-1030. |
入库方式： OAI收割
来源：金属研究所
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