Effect of T6 heat treatment in tribological properties of A356 aluminum alloy reinforced with Al_2O_3 nano particles by combination effect of stir and squeeze casting method

摘要

A356 alloys are attractive alternative for automotive and aeronautical applications. In this work the effects of T6 heat treatment in tribological properties of A356 alloy reinforced with Al_2O_3 nano particles of size 30nm are investigated. The percentage inclusions Al_2O_3 were varied from 0.5 to 1.5wt%. The particles were added with stirring at 400rpm and squeeze casting at 750°C and pressure of 600MPa in the squeeze casting machine. The tribological properties of the samples were also investigated by pin-on-disk tests at 10,30,50and 70N, sliding speed 0.534m/s and sliding distance 1100m in dry condition. The lowest dry wear rate obtained through T6 heat treatment condition.