时效早期Al-Mg-Si合金的组织和析出相的演变

郑亚亚, 罗兵辉, 柏振海

Evolution of Microstructure and Precipitates of Al-Mg-Si Alloy during Early Aging Process

ZHENG Yaya, LUO Binghui, BAI Zhenhai

表2 Al-Mg-Si合金经不同热处理后析出相尺寸特征的统计数据

Table 2 Statistical calculation of the size and density of the precipitates in the alloy with different heat-treatment histores

Ageing time/min Ageing temperature/℃ Average size/nm Number density/1023·m-3 Volume fraction/% 20 140 - - - 170 - - - 200 7.2±1.3 0.82±0.12 0.98±0.03 60 140 3.8±1.2 0.77±0.11 0.44±0.02 170 12.3±1.1 1.79±0.16 1.25±0.03 200 17.2±1.4 1.52±0.17 1.48±0.02 300 140 15.4±1.3 1.39±0.18 1.29±0.02 170 28.8 ±1.4 1.59±0.13 1.69±0.02 200 50.8±1.5 0.83±0.11 1.41±0.03 500 140 19.5±1.4 1.48±0.15 1.34±0.02 170 39.8±1.6 1.58±0.17 1.72±0.04 200 65.3±1.4 0.69±0.18 1.33±0.03