EFFECT OF THE AL2O3 PARTICLE ON THE WEAR RATE AND MICROSTRUCTURE OF HYPO AND HYPER AL-SI ALLOYS

Abstract

In the present work wear performance and hardness of as cast Al-Si alloys before and after the addition of Al2O3 were investigated. Wear specimens of cylindrical shape were prepared from cast ingot. Wear test were conducted on the samples by using pin on dick wear type. The test variable were load and time. It was observed that when Silicon content increased the hardness increased while the wear rate decreased. When the load and time increased the wear rate also increased. By the addition of Al2O3 particles the wear rate decreased while the hardness increased