المجلة الدولية للعلوم والتقنية

This work-study presents the effects of process parameters of electrical discharge machining of AISI D2 cold work tool steel such as peak current and pulse-on time duration which tend to cause metallurgical changes in surface of workpiece these parameters have been investigated to explore their effects on surface roughness and the microstructure changes like the depth of white layer, heat affected zone and crack depth. The results shows that the increase in current and pulse duration does affect the amount of surface roughness ,white layer and heat affected layer thickness , also crack length showed influenced by variation in process parameters.