Abstract: Effects of Cu additions on tensile properties of Al-6Si-0.5Mg cast alloy at different strain rates were studied. The solution treated Cu containing alloys (0.5 – 4 wt %) were aged isochronally for 1 hour at temperatures up to 300oC.The uniaxial tension test was carried out in a standard tensile test machine at strain rate ranging from 10–4 to 10–2 s–1 in order to investigate the effects of Cu on tensile properties at these strain rates. Tensile strength was found to increase with ageing temperature and the maximum being attained at peak aged condition (1 hr at 225oC). The additions of Cu resulted in an increase in tensile strength and 2 wt% Cu addition showed maximum strength all over the experimental strain rates and ageing temperatures. Evaluations of tensile properties at the three different strain rates (10-4, 10-3 & 10-2s-1) showed that they affected the tensile properties significantly. The strength was better at higher strain rate but ductility was poor. The fracture surfaces of the broken specimens showed that both ductile and ductile-brittle mixed fracture depending on strain rates and allowable Cu concentrations
Keyword: Al-6Si-0.5Mg alloy, T6 heat treatment, tensile properties, strain rate
Title: Influence of Cu on Tensile Properties of Thermal Treated Al-6Si-0.5Mg Cast Alloys at Various Strain Rates
Author: Abul Hossain, ASW Kurny
International Journal of Mechanical and Industrial Technology (IJMIT)
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