Effects of Strain Rate on Tensile Properties and Fracture Behavior of Al-Si-Mg Cast Alloys with Cu Contents

Abul Hossain¹ and ASW Kurny^1,

¹Department of Materials and Metallurgical Engineering, Bangladesh University of Engineering and Technology, Dhaka, Bangladesh

Cite this paper:
Abul Hossain and ASW Kurny. Effects of Strain Rate on Tensile Properties and Fracture Behavior of Al-Si-Mg Cast Alloys with Cu Contents. Materials Science and Metallurgy Engineering. 2013; 1(2):27-30. doi: 10.12691/msme-1-2-3

Abstract

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.

Keywords:
Al-6Si-0.5Mg alloy precipitation hardening tensile properties strain rate

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