中南大学学报（自然科学版）2012，Vol.43Issue(7)：2528-2533,6.
过饱和7050铝合金固溶体中第二相粒子的析出动力学
Precipitation kinetics of second-phase particles in supersaturated solid solution of 7050 aluminum alloy
摘要
Abstract
The precipitation kinetics of second-phase particles in supersaturated solid solution of 7050 aluminum alloy was investigated by a combination of differential scanning calorimetric (DSC) techniques with Avrami-Johnson-Mehl (AJM) equation and multi-peak separation. The result shows that, the activation energy of GP I (367±1) K, η' phase (507±l) K and η phase (524±1) K are (76.5±0.6), (183.6±2.1) and (666.6±16) kJ/mol, respectively. The constant of k0, are 5.48× 1010, 5.48× 1018 and 3.14× 1066 /s. The equations of the corresponding kinetic are gained at the same time. In this experimental condition for calculating, the peak strength time of the quenched 7050 aluminum alloy aged at 393 K is about 280 h, while at 453 K is about 0.5 h. And the calculated results agree well with the experimental results. So it is significant to direct the artificial aging treatment after quenching.关键词
差示量热法/7050铝合金/动力学/激活能Key words
differential scanning calorimetric/7050 alloy/kinetics/activation energy分类
矿业与冶金引用本文复制引用
杨金龙,邓运来,祁小红,万里,张新明..过饱和7050铝合金固溶体中第二相粒子的析出动力学[J].中南大学学报（自然科学版）,2012,43(7):2528-2533,6.基金项目
国家基础研究计划项目(2010CB731700) （2010CB731700）
