Machinability analysis and optimisation of EDM in AA6082/3 wt% BN/1 wt% MoS2 hybrid composites using entropy method weights integrated with complex proportional assessment (COPRAS) method

An investigation was made on composites containing AA6082 as matrix and boron nitride/molybdenum disulphide (BN/MoS2) reinforcement, which a composite materials hybrid at 3 wt% of BN 1% MoS2 fabricated by stir casting methodology. Using electrical discharge machining (EDM) equipment, machinability studies were undertaken to achieve an optimal condition process parameters. Taguchi (L27 orthogonal array)-based design experiments employed examine the influence parameters like pulse time (Ton), peak current (IP), gap voltage (V) material removal rate (MRR), circularity (CIRC), electrode wear (EWR), cylindricity (CYLD). Multi-criteria decision-making (MCDM) methodology for while AA6082/3 BN/1% composites. entropy-based objective weights method integrated with complex proportional assessment (COPRAS) approach assess most excellent level The entropy (Wj) 0.1285, 0.1002, 0.5707, 0.2005 MRR, EWR, CIRC, CYLD. Optimal conditions are obtained from COPRAS relative significance score, quantitative utility score in nineteenth experiment having 15 A, 50 ?s, 30 V 0.0735 higher 100% being achieved. SEM, machined surface is analysed micro-structural examination. At micro-voids craters poor finish located.