Research Article

Parametric Optimization of Wire Electrical Discharge Machining in AA7075 Metal Matrix Composite

Table 6

Regression equation for MRR and Ra.

MRR = 0.189000–0.027333 Ton_110–0.002000 Ton_120 + 0.029333 Ton_130–0.005667 Current_10 + 0.001000 Current_15 + 0.004667 Current_20 + 0.001000 wire feed_1 + 0.000000 wire feed_2–0.001000 wire feed_3

Ra = 2.79689–0.50056 Ton_110 + 0.15011 Ton_120 + 0.35044 Ton_130–0.03556 Current_10–0.00689 Current_15 + 0.04244 Current_20–0.00689 wire feed_1 + 0.01411 wire feed_2–0.00722 wire feed_3