Surface Destruction in Electrical Discharge Machining

In electrical discharge machining, the formation of the modified surface layer depends on the physicochemical properties of the anode and cathode and the machining conditions. Experiments show that the mass transfer and coating thickness decrease with increase in thermal conductivity and decrease in melting point of the anode and cathode. The mass transfer and state of the modified surface are also impaired by increase in energy of the generator pulses and increase in roughness of the machined surface. These data are fundamental in selecting electrode materials and creating metal coatings with specified functional properties.