Influence of Heat Treatment on Tribological Properties and Corrosion Resistance of A356 Alloy Based Hybrid Composite

Abstract

In the present work stir casting process was introduced and the commercial A356 aluminium alloy reinforced with RHA/ Al₂O₃ particulates in equal proportions (1wt%, 2wt%, 3wt%, 4wt% and 5wt%) were used for the present study. A356 alloy belongs to a group of hypoeutectic Al-Si alloys and has wide applications in marine and automotive.RHA/Al₂O₃ based A356 hybrid composite is a refractory compound that exhibits outstanding features such as high melting point, high wear and corrosion resistance due to T6 heat treatment. After T6 heat treatment, the microstructures of (RHA/ Al₂O₃) undergo a remarkable change, leading to the improvement of tribological properties of hybrid composites. It was also observed that the density of hybrid composites decreased with increasing particle (RHA/Al₂O₃) content.