Dry Sliding Wear Behavior of Al 2219/Al2O3-MoS2 Metal Matrix Hybrid Composites Produced by Stir Casting Route

Abstract

In this paper, it is aimed to present the experimental results of the studies conducted regarding microstructure, density, hardness, dry sliding wear test of Al2219 and hybrid metal matrix composites prepared by stir casting technique. The distribution of Al₂O₃ and MoS₂ resulted in improving the hardness and density of the composite.The microphotographs of the composites studies revealed that, randomly and uniform distribution of the particles in the matrix alloy. The dry sliding wear test is carried out for different sliding speeds, sliding distances and different loads conditions using pin on disc apparatus. It is found that the addition of Al₂O₃ and MoS₂ reinforcement increases the wear resistance of the composite. The wear rate decreases with the increase in the percentage by weight of Al₂O₃ and MoS_2. As the sliding speed increases the wear rate decreases initially and then increases. The wear rate increases with increase in load and sliding distance.