<p>Functionally graded materials (FGMs) gradually change their properties over time to produce customizable qualities. In the current work, the authors have attempted to use the gravity die casting procedure to make an FGM sample. The FGM sample was made from two distinct alloys, namely, ZnAl₄ and Al7075. Using the aforementioned method, ZnAl₄/Al7075 FGM samples were made both with and without Ag and Pb interfacing foils. Electric discharge machining was performed on the zinc side of the ZnAl₄/Al7075 sample without an interface based on the microhardness value results. A full factorial experimental design was employed to investigate the influence of machining process parameters on material removal rate (MRR) and tool wear rate (TWR), and a linear regression model was created. To improve machining performance, experiments were carried out using different combinations of dielectric media. The results showed that, in comparison to paraffin and EDM oil, kerosene increased MRR by 70.3%. The TWR was found to be 11.48% lower when paraffin was compared to kerosene and EDM oil. Moreover, comparing the EDM Oil and paraffin oil separately, there was a 65.07 percent improvement, and a 47.16 percent improvement was observed. It is noted that a high value of R² indicates the regression analysis, which has successfully modeled the machining characteristics of the FGM in this research.</p>