| Effect of Rare Earth Elements on Anisotropy and Microstructure of AI-Li Alloy 2195 Sheets |
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| 作者姓名： | 许越 耿季平 刘玉峰 |
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| 作者单位： | School of Materials Science and Engineering, Beijing University of Aeronautics and Astronautics, Beijing 100083, China |
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| 基金项目： | Project supported by the National Key Laboratory of Precision Thermal Treatment, Harbin Institute of Technology （51471050105HK0101） |
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| 摘 要： | For the purpose of decreasing the applied limitation resulting from the anisotropic mechanical property of Al-Li alloy 2195, this study employed a complex heat treatment process, involving the pre-tension, thermo-infiltration of the rare earth element Ce, solution treatment, and artificial aging technology. The results indicate that the infiltration of rare earth element Ce benefits the abatement of anisotropy of Al-Li alloy 2195 sheet, in contrast with that of the normal heat treatment process. The gradient of the Vickers-hardness decreases at least 50% through the thickness, and the tensile strength in the rolling direction also increases significantly. If Ce was infiltrated into the alloy under the optimum pre-deformation, the yield strength （σ0.2） increased by 30 MPa while the tensile strength （σb） enhanced by 25 MPa compared to the rare earth free samples. Meanwhile, the fractography illustrated that the fracture surface of the sample became more desirable.
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| 关 键 词： | 铝锂合金2195薄板 热处理 各向异性 机械性能 稀土元素 |
| 文章编号： | 1002-0721（2006）06-0793-04 |
| 收稿时间： | 2006-06-20 |
| 修稿时间： | 2006-08-25 |
Effect of Rare Earth Elements on Anisotropy and Microstructure of AI-Li Alloy 2195 Sheets |
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| Xu Yue , Geng Jiping , Liu Yufeng.Effect of Rare Earth Elements on Anisotropy and Microstructure of AI-Li Alloy 2195 Sheets[J].Journal of Rare Earths,2006,24(6):793-796. |
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| Authors: | Xu Yue Geng Jiping Liu Yufeng |
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| Abstract: | |
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| Keywords: | aluminum-lithium alloy heat treatment anisotropy mechanical property rare earth elements |
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