New M.Tech. Thesis Submitted from Producation

TO STUDY THE MECHANICAL PROPERTIES OF ALUMINUM MATRIX COMPOSITE REINFORCED WITH RICE HUSK ASH USING STIR CASTING PROCESS by Amar Singh 

Abstract

Aluminum composite are a new generation of metal matrix composites that have the potentials of satisfying the recent demands of advanced engineering applications. In the current work, a new composite material was fabricated with the reinforcement of rice husk ash (RHA) percentage (2%, 4%, 6%, 8% and 10%) by weight in the aluminum by using stir casting method. Investigation of mechanical properties like tensile strength, impact strength and hardness was done. The fabricated composites showed improvement of 43.9% in tensile strength, 61.5% impact strength, and 16.1% in hardness over the pure aluminum. Also, an attempt has been made to study the machining feasibility of fabricated composites with electrical discharge machining (EDM) using copper electrode. The input parameters are current, voltage and performance parameters are material removal rate (MRR) and surface roughness (SR). The material removal rate of fabricated composites (pure aluminum to Al+10%RHA) increases linearly at current (8amp) and voltage (50v). The value of surface roughness of pure aluminum is better than fabricated composites.