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| 1420铝锂合金超塑性行为 | |
| 引用本文： | 郑路,张艳苓,王耀奇,侯红亮,范同祥.1420铝锂合金超塑性行为[J].山东大学学报(工学版),2014,44(3):90-94. |
| 作者姓名： | 郑路 张艳苓 王耀奇 侯红亮 范同祥 |
| 作者单位： | 1. 上海交通大学金属基复合材料国家重点实验室, 上海 200240; 2. 中国航空工业集团公司北京航空制造工程研究所, 北京 100024 |
| 基金项目： | 国家重点基础研究发展计划资助项目（2011CB012800） |
| 摘 要： | 以1420铝锂合金作为实验材料,通过改变应变速率来探求最佳的超塑性变形条件,即延伸率大幅度提高和获得变形均匀的细小微观组织。研究发现当温度为480℃,应变速率为3×10-4s-1时可以获得最佳超塑性变形状态,此时延伸率δ=550%,流变应力σ=1.9 MPa。同时通过金相分析以及TEM微观组织观察发现,在此条件下的组织等轴性好同时晶粒分布细小均匀,出现了细小的再结晶亚晶粒,有助于超塑性变形的进行。 |
| 关 键 词： | 延伸率 再结晶 1420铝锂合金 超塑性变形 应变速率 流变应力 |
| 收稿时间： | 2013-11-28 |
Superplastic behavior of 1420Al-Li alloy |
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| ZHENG Lu,ZHANG Yanling,WANG Yaoqi,HOU Hongliang,FAN Tongxiang.Superplastic behavior of 1420Al-Li alloy[J].Journal of Shandong University of Technology,2014,44(3):90-94. | |
| Authors: | ZHENG Lu ZHANG Yanling WANG Yaoqi HOU Hongliang FAN Tongxiang |
| Affiliation: | 1.State Key Laboratory of Metal Matrix Composites, Shanghai Jiao Tong University, Shanghai 200240, China; 2.Beijing Aeronautical Manufacturing Technology Research Institute, Aviation Industry Corporation of China, Beijing 100024, China |
| Abstract: | 1420Al-Li alloy was used to explore the best deformation results including high elongation, uniform, and fine-grain structure by changing deformation temperature and strain rate. The results showed that, on the condition of deflection temperature T=480℃ and strain rate =3×10-4s-1, 1420 Al-Li alloy showed good superplasticity, of which the maximum elongation δ=550％ and the minimum flow stress σ=1.9MPa. Furthermore, the grain microstructure was isometric and fine after superplastic deformation through metallurgical analysis and TEM microstructure observation. Besides, the re-crystallization grains appeared which could promote the super-plastic deformation process during the deformation. |
| Keywords: | re-crystallization strain rate elongation 1420 Al-Li alloy super-plastic deformation flow stress |
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