International Journal of Engineering and Technology

this work investigated the influence of Fly ash and graphite on the microstructure and mechanical behaviour of Al-7Si-Fly ash and Al-7Si-Graphite composites. The investigation reveals the effectiveness of incorporation of Fly ash and Graphite in the Al-7Si alloy for studying mechanical properties. The composites were fabricated using liquid metallurgy route. The Al-7Si-Fly ash and Al-7Si- Graphite composites were fabricated separately by introducing 6 wt. % of Fly ash and graphite particulates by two stage melt stirring process. In this reinforcement particulates were added in two steps to increase the wettability. The characterization was performed through Scanning Electron Microscope and Energy Dispersive Spectrum. The particle distribution was uniform in these composites. The hardness, ultimate tensile strength and yield strength of both Fly ash and Graphite composites were evaluated as per ASTM standards. Further, a comparative study has been made between the Al-7Si-Fly ash and Al-7Si-Graphite composites. Fly ash particulates reinforced composites were shown better results compared to graphite reinforced composites