Effects of Secondary Aging on precipitation Behavior and Mechanical Properties of Extruded Al-Mg-Si Alloy
Author of the article:LI Tao;LIU Jifei;LIU Lanjun
Author's Workplace：School of Materials Science and Engineering,Hefei University of Technology,Hefei 230009,China
Key Words：Al-Mg-Si alloy secondary aging precipitation behavior mechanical properties
Abstract：
The precipitation behavior and mechanical properties of aging Al-Mg-Si alloy had been studied by hardness tests, tensile tests and DSC, SEM. The results show that pre-aging at 170 ℃ about 30 min is conducive to the formation of GP zone, and aging at 60 ℃ can promote the precipitation of GP zone;Compared with T6 heat treatment, secondary aging(T6I6) has improved the hardness, elongation and tensile strength of Al-Mg-Si alloy. The precipitate is refined and the microstructure is more uniform.
