Microhardness and Wear Rate Analysis on Laser Cladded Composites of AZ91D Alloy with SiC by Grey Technique

Owing to increments in heavy vehicles for transporting the materials and reducing the vehicle weight, magnesium alloys play the mandatory role in various fabricating industries. The Mg alloy alone does not satisfy their necessities without adding the strengthening particles; therefore, this investigation stated the silicon carbide (SiC) was the reinforcing into AZ91D Mg alloy to compose the coating metal matrix composites through the laser cladding process. This method is unique when appropriated processing parameters are chosen and compared to laser melting process; laser cladding is the significant one. The laser cladding processing parameters are scanning speed (3–5 m/s), SiC proportions (10–30%) and laser output power (0.6–0.8 kW), respectively. Then the composed coating AZ91D Mg alloy with SiC specimen is accounted for experimentation of microhardness and wear rates. The microhardness and wear rates are improved at increasing of weight percentage from 20 to 30%, maximum of scanning speed at 5 m/s and 0.7 kW of laser output power parameters. The grey relational multi-task optimization method was utilized to recognize the single responses from various laser cladding processing parameters. Finally, the SEM with worn surfaces was taken on the optimal specimen composite.