Optimization of turning parameters for Magnesium Silicon Carbide using TOPSIS method

A composite consists of at least two constituent parts, one being a metal necessarily, and the other material may be a different metal or another material, such as a ceramic or organic compound. As a lightest metal structural material, magnesium matrix composites exhibit many advantages over monolithic magnesium or magnesium alloys, such as high elastic modulus, high strength, and superior creep at elevated temperatures. Magnesium based metal matrix composites had been used in biomedical operations due to biocompatibility and ductility. Magnesium Silicon Carbide (MMC) is carted with Magnesium 90% by mass and Silicon Carbide 10% by mass through Stir Casting process. Turning operation was performed according to the DOE with the utilization of CCD. The input factors considered for the experimentation is of three levels and the output responses are surface roughness, surface hardness and out of roundness. Using Entropy method, weightage for TOPSIS method is calculated. The multi-responses were optimized using Technique for Order Preference by Similarity to the Ideal Solution (TOPSIS) and optimal parameters were determined and found to be cutting speed as 500rpm, feed as 0.2mm/rev and depth of cut as 0.2 mm.