Influence of Melt Treatments on Dry Sliding Wear Behavior of Hypereutectic Al-15Si-4Cu Cast Alloys

The purpose of the present work is to investigate the microstructure and dry sliding wear behavior of hypereutectic al-15si-4cu cast alloys with grain refinement, modification and/or refinement. pin-on-disc wear tests were conducted under dry sliding conditions on the hypereutectic al-15si-4cu cast alloy after various melt treatments for varying loads ranging from 20n to 100n with constant sliding speed of 1 m/s and for a constant sliding distance of 1000m. tests were also conducted on the hypereutectic al-15si-4cu cast alloy for sliding distance of 2000m with constant sliding speed of 1 m/s and at a normal load of 60n. results indicate that the addition of grain refiner (al-1ti-3b), modifier (sr) and refiner (p) to the hypereutectic al-15si-4cu unmodified cast alloy converts large á-al grains in to fine equiaxed α-al grains and forms fine fibrous silicon particles and fine cual2 particles in the interdendritic region. this improves the wear properties of the cast alloy