In this study, the effects of Electrical Discharge Machining (EDM) on an Aluminum (AA6061) Metal Matrix Composite (MMC) reinforced with tungsten carbide are examined. Poor surface roughness (SR) and a slower metal removal rate (MRR) are experienced during conventional machining of an MMC. Therefore, EDM is the best alternative method for cutting complex shapes in MMC. In this experiment, Aluminum (AA6061) with WC added in three different concentrations was used (i.e., 3%, 6% and 9%). While maintaining a constant dielectric cleaning pressure, applied voltage, and electrode feed rate, machining procedures are accomplished by modulating the pulse on time (A), pulse off time (B), and peak current (C). Taguchi methods are used to optimize the parameters. It has been determined that using a 3% WC reinforcement increases metal removal rate while decreasing surface roughness. It is also found that the A and C parameters have a more significant effect on the MRR and SR.

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