In this study, MRR, SR, and HV in powder mixed electrical discharge machining (PMEDM) were multi ? criteria decision making (MCDM) by TOPSIS method. The process parameters used included work piece materials, electrode materials, electrode polarity, pulse?on time, pulse?off time, current, and titanium powder concentration. Some interaction pairs among the process parameters were also used to evaluate. The results showed that optimal process parameters, including ton = 20 µs, I= 6 A, tof = 57 µs, and 10 g/l. The optimum characteristics were MRR = 38.79 mm3/min, SR = 2.71 ?m, and HV = 771.0 HV.
PMEDM, TOPSIS, MRR, HV, SR
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