Optimization of WEDM Parameters During Machining of Ni-75 Using AHP-MOORA Method

The objective of this study is to perform multi-characteristic optimization of WEDM parameters while machining Nimonic -75 (Ni-75) alloy using an integrated approach of AHP-MOORA method. Taguchi’s L27 orthogonal matrix is used to conduct the experiments. The cutting factors selected for this research work are the pulse on time (Pon), pulse off time (Poff), gap voltage (GV), peak current (IP), wire velocity (WV) and wire tension (WT) while the outcomes are MRR, surface roughness, and kerf width. AHP method is used to find out weights for the chosen quality characteristics, and MOORA technique is employed to determine the most favorable cutting conditions. The optimum combination of explanatory factors are Pon = 110 machine units (mu), Poff = 51 mu, GV = 40 V, IP = 230 Amp., WV = 5 m/min and WT = 8 mu. Finally, authentication trials are accomplished to validate the results.