形变对含稀土的铝-镁-硅合金沉淀强化的影响

形变对含稀土的铝-镁-硅合金沉淀强化的影响 Effect of Deformation on Precipitation Strengthening for A1-Mg-Si Alloy Containing Rare Earth Metals 王绍苓 Wang Shaoiing Zhou Xiaoping 1 2 first-author 周小平 1 2 辛贤柳 1 2 黄道国 1 2 武汉大学物理系 武汉大学物理系 Department of physics, Wuhan University) Xin Xianliu Huang Daoguo Department of physics, Wuhan University) Xin Xianliu Huang Daoguo 武汉电线厂 武汉电线厂 对含镁0.69%、硅0.63%以及混合稀土0.11%的Al-Mg-Si-RE合金作了固溶一淬火—时效和固溶—淬火—形变—时效两种不同处理,然后对试样作力学性能测量,并制成薄膜进行透射电子显微镜观察。结果表明:淬火后时效前的形变,对该合金强化相的析出起促进作用。这是由于形变产生的位错给针状沉淀相提供了成核的位置,促进了针状沉淀物的成长所致。 Two different treatments, ageing and deformation ageiug after solution- quenzhing, have been made for the speciments of A1-Mg-Si-RE alloy which contains 0.69% of magnesium, 0.63% of silicon and 0.11% of mixed rare earth metals. Then, the measurements of mechanical properties were made. And thin-foils were observed by transmission electron microscope. The results show that the deformation, which is produce,t after quenching but before ageing, promotes precipitation of strengthening phase of the alloy. The reason is that dislocation, produced by deformation, provided additional nuclea-tion sites for needle—shaped phase. which promote growth of needle-shaped precipitations. 1984-04-01 2021-04-01 4