Superplastic behavior of micro-regions in two-pass friction stir processed 7075Al alloy
文献类型：期刊论文
| 作者 | Z. Y. Ma ; R. S. Mishra ; F. C. Liu |
| 刊名 | Materials Science and Engineering a-Structural Materials Properties Microstructure and Processing
 |
| 出版日期 | 2009 |
| 卷号 | 505期号:1-2页码:70-78 |
| 关键词 | Superplasticity Friction stir processing Aluminum alloy Overlapping strain rate superplasticity al-mg-zr aluminum microstructure deformation welds |
| ISSN号 | 0921-5093 |
| 中文摘要 | Effect of overlapping passes on the microstructure and superplastic behavior of friction stir processed (FSP) 7075Al was subjected to a detailed investigation. Overlapping passes exerted no obvious effect on the size of recrystallized grains. Both single and two-pass FSP 7075Al exhibited similar grain sizes of 5.4-5.7 mu m. Compared to single-pass FSP, two-pass FSP resulted in an enhancement in superplastic elongation and a change in superplastic response. A shift to higher optimum temperature was observed in the two-pass FSP 7075Al. Furthermore, overlapping passes led to a shift to higher optimum strain rate in the center region of second pass in the two-pass FSP 7075Al. Maximum superplastic elongation of 1220% was achieved at 480 degrees C and an initial strain rate of 1 x 10(-2) s(-1) in the center region of second pass in the two-pass FSP 7075Al. Analyses of superplastic data indicated that grain boundary sliding is the main superplastic deformation mechanism for both single and two-pass FSP 7075Al. (C) 2008 Elsevier B.V. All rights reserved. |
| 原文出处 | |
| 公开日期 | 2012-04-13 |
| 源URL | [http://210.72.142.130/handle/321006/32194]  |
| 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 | Z. Y. Ma,R. S. Mishra,F. C. Liu. Superplastic behavior of micro-regions in two-pass friction stir processed 7075Al alloy[J]. Materials Science and Engineering a-Structural Materials Properties Microstructure and Processing,2009,505(1-2):70-78. |
| APA | Z. Y. Ma,R. S. Mishra,&F. C. Liu.(2009).Superplastic behavior of micro-regions in two-pass friction stir processed 7075Al alloy.Materials Science and Engineering a-Structural Materials Properties Microstructure and Processing,505(1-2),70-78. |
| MLA | Z. Y. Ma,et al."Superplastic behavior of micro-regions in two-pass friction stir processed 7075Al alloy".Materials Science and Engineering a-Structural Materials Properties Microstructure and Processing 505.1-2(2009):70-78. |
入库方式： OAI收割
来源：金属研究所
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