Abstract
Electric Discharge Machining (EDM) has been proven as an alternate process for machining complex and intricate shapes from difficult to machine materials such as hard steels. The success of electric discharge machined components in real applications relies on the understanding of material removal mechanisms and the relationship between the EDM parameters and the surface characteristics of the EDMed material. This paper presents an investigation of the influence of changes in EDM parameters on the surface hardness of electrical discharge machined AISI D3 tool steel. The machining response is the surface hardness of the machined surface (HRc), while the input parameters are Pulse current (Ip), Pulse –on- time (Ton), Pulse –off- time (Toff), and the Gap voltage (Vg). The results provide a valuable insight into the influence of each of the input parameters on the machining response.