| 少量Cu对喷射沉积Al-Li合金显微组织与性能的影响 |
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| 引用本文： | 戴圣龙,韩雅芳,杨守杰,李树索.少量Cu对喷射沉积Al-Li合金显微组织与性能的影响[J].航空学报,2004,25(2):197-200. |
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| 作者姓名： | 戴圣龙 韩雅芳 杨守杰 李树索 |
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| 作者单位： | 1. 北京航空材料研究院,北京,100095
2. 北京航空航天大学,材料科学与工程学院,北京,100083 |
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| 基金项目： | 国家自然科学基金(59881005)资助项目 |
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| 摘 要： | 用喷射沉积方法制备了Al-Li合金及其含0.5%Cu的改型合金,进行了挤压和时效处理,测定了不同状态下这两种合金的显微组织和室温拉伸性能。结果表明,喷射沉积状态的Al-3.8Li-1.0Mg-0.4Ge-0.2Zr合金具有等轴细晶组织,析出Al4Li9和δ AlLi相,时效后析出大量δ' AlLi相;添加0.5%Cu使屈服强度提高30～48MPa,拉伸强度提高44MPa,性能提高的原因是Cu的固溶强化和Li在基体固溶度减少导致δ'相含量增加。
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| 关 键 词： | 喷射沉积 Al-Li合金 时效 拉伸性能 |
| 文章编号： | 1000-6893(2004)02-0197-04 |
| 修稿时间： | 2003年2月21日 |
Effect of Small Content Cu on Microstructure and Properties of Spray Deposited Al-Li Alloy |
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| DAI Sheng-long,HAN Ya-fang,YANG Shou-jie,LI Shu-suo.Effect of Small Content Cu on Microstructure and Properties of Spray Deposited Al-Li Alloy[J].Acta Aeronautica et Astronautica Sinica,2004,25(2):197-200. |
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| Authors: | DAI Sheng-long HAN Ya-fang YANG Shou-jie LI Shu-suo |
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| Institution: | DAI Sheng-long~1,HAN Ya-fang~1,YANG Shou-jie~1,LI Shu-suo~2 |
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| Abstract: | Al-Li alloy containing high content of Li and its modified alloy with 0.5% Cu are prepared by spray deposited processing,and then extruded and aged. Microstructure and tensile properties at room temperature are determined for the two alloys at different conditions. The results show that spray deposited Al-3.8Li-1.0Mg-0.4Ge-0.2Zr alloy possess a fine equiaxed microstructure and precipitates Al4Li9 and δ-AlLi phases. Large amounts of δ'-AlLi phases are formed after aging. The addition of 0.5%Cu to the alloy leads to an improvement of 30～48MPa and 44MPa for yield strength and ultimate tensile strength respectively. The reason of improvement is due to the solid-solution strengthening effect of Cu and the decrease of the solid solubility of Li in the matrix leading to the higher volume fraction of δ'phases. |
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| Keywords: | spray deposition Al-Li alloy aging tensile property |
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