含稀土Al-Mg-Si合金G.P.区形成临界温度的探测

含稀土Al-Mg-Si合金G.P.区形成临界温度的探测 A INVESTIGATION ON THE CRITICAL TEMPERATURE FOR G.P.ZONE FORMATION IN Al-Mg-Si CONTAINING RARE EARTH METALS 王绍苓 1 2 first-author 周小平 1 2 冯永昌 1 2 王亮 1 2 辛贤柳 1 2 崔巍 1 2 武汉大学物理系 武汉大学物理系 武汉电线厂 武汉电线厂 用硬度测量及透射电于显微镜观测的方法, 探测了含稀土Al-Mg-Si,合金G.P.区形成的临界温度Tc,讨论了该合金中过量Si的作用,分析了稀土（RE）元素对临界温度的影响。结果表明: Al-0.65%Mg-0.61%Si-0.125%RE合金的临界温度为230±10℃;过量Si提高了合金的过饱和度,从而提高了临界温度;稀土降低了临界温度。 The critical temperature for G. P. zone formation, Tc, is investigated for an Al-Mg-Si alloy containing rare earth metals by hardness measurements and transmission electron microscope observations. The effect of si excess in the alloy is discussed. The effect of rare earth elements on the critical temperature is analyzed. The results indicate that the critical temperature for Al-0.65 pct Mg-0.61 pct Si-0.13 pct RE alloy is 230±10℃. The si excess, by increasing the supersaturation of the alloy, enhances the critical temperature, Rare earth elements reduced the critical temperature. 1985-03-01 2021-04-01 3