FABRICATION OF AL/FLY ASH MMC, IDENTIFYING MECHANICAL PROPERTIES & MULTI OBJECTIVE OPTIMIZATION FOR TURNING PROCESS USING GREY RELATIONAL ANALYSIS

This paper investigates the effects and multi objective of optimization of turning process parameters. The process parameters selected for optimization are speed, feed and depth of cut. In this study Al-LM 25 has been selected as the base material which is having a wide variety of application in the cylinder block liners, vehicle drive shafts, bicycle frames automotive pistons etc. An attempt had been made to increase in strength by adding 12% of Fly-ash and 8% of Magnesium to make a metal matrix composite by Steer Casting process the hardness had been increased from 66.04 BHN to 78.14 BHN. The experimental runs are carried out based on L9 Orthogonal Array (OA). Surface Roughness (Ra) and Material Removal Rate (MRR) are taken as process responses. The objective of optimization is to achieve minimum surface roughness and high material removal rate simultaneously, process parameters are optimized based on Taguchi technique coupled with grey relational analysis. Analysis Of Variance (ANOVA) has been carried out to get the contribution of each process parameters on the process responses and final effects of process parameters on material removal rate and surface roughness is plotted and studied.