Mechanical and Dry Sliding Wear Properties of LM6 Aluminium Metal Matrix Composites Reinforced with Agricultural and Industrial Waste

Abstract

This research investigates the enhancement of LM6 aluminium alloy properties through the stir casting method by incorporating various agricultural waste-derived ashes as reinforcements, with a focus on wear-related aspects. The study examines composite materials reinforced with rice husk ash (RHA), coconut shell ash (CSA), wood chips ash (WCA) and fly ash (FA), aiming to improve the wear resistance alongside mechanical properties. LM6 aluminium alloy, widely used in industrial applications, is chosen as the main matrix material due to its desirable properties. Stir casting method was employed to fabricate three different composite materials, each reinforced with a combination of RHA, CSA, WCA and FA. The proportions of each reinforcement were carefully optimised not only for mechanical enhancements but also for improving wear resistance. Comprehensive characterisation studies, including mechanical testing and wear testing, were conducted to evaluate the performance of the composite materials. Results of these blended composites demonstrate significant enhancements in wear resistance, tensile strength and hardness compared to the base LM6 aluminium alloy.