Study on mechanical and micro-structural properties of aluminium matrix composite reinforced with graphite and granite fillers

Abstract

Composites are gaining increasing popularity nowadays due to their wide range of applications and flexible design options. Aluminium Matrix Composites (AMCs) have garnered increasing attention in contemporary times as a subject of research. The inclusion of reinforcements in the metallic matrix results in improved stiffness, specific strength, wear resistance, creep resistance, and fatigue characteristics when compared to conventional engineering materials. In our study, we are employing a 6061 grade Aluminium alloy as the fundamental material, and augmenting it with Synthetic Graphite and Granite fine particles as strengthening agents. The Aluminium matrix composite is produced through the incorporation of synthetic graphite particles and granite dust into the molten aluminium via a Stir Casting Furnace utilising a bottom pouring technique at temperatures within the range of 850 to 950 °C. The Aluminium Metal Matrix composite samples is fabricated with varying reinforcement percentages relative to the base material. The distribution of particles within the Aluminium Matrix is analysed. Furthermore, the fabricated composites have undergone Tensile, Impact, Shear, and Micro hardness tests to assess the effects of incorporating reinforcements. All examinations conform to the standards set by ASTM. A comparative analysis is conducted between the mechanical properties exhibited by the original Aluminium alloy and the Aluminium metal matrix composites that have been manufactured.