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通过拉伸和电镜观察等方法研究了时效处理对快速凝固的 Al-2.4Li-2.4Cu,Al-2.4Li-2.4Cu-0.3Zr 和 Al-2.4Li-2.4Cu-0.7Zr 三种合金结构与性能的影响。实验结果表明,加入 Zr元素和进行预变形可明显地提高 Al-Li-Cu 合金的时效速度并提高合金的强度。但 Zr 含量超过0.3wt-%以后并不产生明显的强化效果。预变形产生的位错对 T1 强化相的均匀析出十分有利。
The effects of aging treatment on the microstructures and mechanical properties of the rapidly solidified Al-2.4Li-2.4Cu, Al-2.4Li-2.4Cu-0.3Zr and Al-2.4Li-2.4Cu-0.7Zr alloys were studied by means of stretching and electron microscopy. The impact of performance. The experimental results show that the addition of Zr and pre-deformation can significantly improve the aging speed of Al-Li-Cu alloy and improve the strength of the alloy. However, Zr content of more than 0.3wt-% does not produce significant strengthening effect. The dislocations generated by pre-deformation are very favorable for the uniform precipitation of T1-enhanced phase.