LAUSR

AbstractCopper-coated steel wires (5 numbers) were uniformly reinforced in AA336 aluminium alloy using squeeze casting process. Microstructure of castings was examined, and dry sliding wear test was performed by considering the factors viz., load (10–50 N), velocity (1–5 m/s) and sliding distance (500–2500 m). Response surface methodology was used to design the experiments by considering three factors, five levels central composite design. A regression model was developed to predict the weight loss of composites and checked its adequacy using significance tests, analysis of variance and confirmation tests. Worn surfaces of composite were investigated using field emission scanning electron microscope and reported with wear mechanisms. Dry sliding wear parameters were optimised for obtaining minimum weight loss. Microstructure of casting showed the reinforcement of steel wires in AA336 aluminium alloy and copper coating on steel wires offered better interface bonding between matrix and reinforcement. Response surface plots revealed that weight loss of composites increased with increasing load and sliding distance. Worn surface of composites showed fine grooves at lower loads and delamination was observed at higher loads. 18.1 N load, 2.41 m/s velocity and 2094 m sliding distance were observed as optimum dry sliding wear parameters for obtaining minimum weight loss.