Science and Education Publishing Materials Science and Metallurgy Engineering 1 1 2013 10 21 Effects of Strain Rate on Tensile Properties and Fracture Behavior of Al-Si-Mg Cast Alloys with Cu Contents 27 30 EN Abul Hossain ASW Kurny Department of Materials and Metallurgical Engineering, Bangladesh University of Engineering and Technology, Dhaka, Bangladesh MSME2013123 10.12691/msme-1-2-3 2013 09 30 2013 10 20 2013 10 21 Effects of strain rates on tensile properties and fracture behavior of Al-6Si-0.5Mg alloy containing 0.5 – 4 wt% Cu were studied. The solution treated alloys, containing different amounts of Cu, were aged isochronally for 1 hour at temperatures up to 300°C. Tensile strengths were found to increase with ageing temperature, the maximum being attained at peak aged condition (1 hr at 225°C). Addition of Cu resulted in an increase in tensile strength and 2 wt% Cu addition showed the maximum strength. Evaluation of tensile properties at three different strain rates (10^-4, 10^-3 and 10^-2 s^-1) showed that strain rates affected the tensile properties significantly. At higher strain rates the strength was better but ductility was poor.