2023 Volume 73 Issue 12 Pages 592-597
Tensile properties have been evaluated for four kinds of Al-Mg-Si base alloys which were cold rolled by 90% and subsequently aged for 1 min, 30 min, 18 h at 170°C. To study the effect of alloy compositions and aging conditions on deformation behavior, fracture surface observations and strain distribution analysis during tensile deformation were performed. Strain distribution in the tensile specimens was evaluated by digital image correlation method. The ductility in the specimens aged for 1 min and 30 min after cold rolling was improved due to increase in both uniform and local elongation. All the specimens showed ductile fracture, while the specimen added with 0.71%Fe showed slightly lower ductility. The addition of copper improved strength without deteriorating ductility. The relation between mechanical properties and microstructure is discussed to obtain basic information required to improve strength and ductility of Al-Mg-Si alloys.
