添加3%Zn对Al-Mg-Si-Cu合金非等温时效析出行为的影响

袁波, 郭明星, 韩少杰, 张济山, 庄林忠

Effect of 3%Zn Addition on the Non-Isothermal Precipitation Behaviors of Al-Mg-Si-Cu Alloys

YUAN Bo, GUO Mingxing, HAN Shaojie, ZHANG Jishan, ZHUANG Linzhong

表1 1#和2#合金固溶淬火态不同沉淀相析出动力学方程

Table 1 The kinetics of precipitation in different state in the 1# and 2# alloys

DSC peak Q / (kJ·mol-1) k0 / min-1 Kinetics expression 1# alloy GP zone formation 42.2 6.3 × 105 1 - exp[-6.3 × 105texp(-5082 / T)] 2# alloy GP zone formation 51.6 1.5 × 107 1 - exp[-1.5 × 107texp(-6209 / T)] 1# alloy GP zone dissolution 80.7 5.0 × 108 1 - exp[-5.0 × 108texp(-9713 / T)] 2# alloy GP zone dissolution 67.0 1.8 × 107 1 - exp[-1.8 × 107texp(-8063 / T)] 1# alloy Precipitate formation 100.1 8.2 × 109 1 - exp[-6.8 × 1019t2exp(-24090 / T)] 2# alloy Precipitate formation 98.8 7.3 × 109 1 - exp[-5.4 × 1019t2exp(-23780 / T)]