Abstract
Electrical Discharge Machining is an advanced machining method with various advantages, as a result of which, its use is becoming more & more widespread. This process is one of the modern machining processes which is characterized by the absence of plastic deformation and chip formation. The advancement of this process may further be enhanced by utilizing powder particles within dielectric medium that is designated as Powder Mixed Electrical Discharge Machining (PMEDM) process. In the current study, to enhance the surface roughness (SR) of AISI-D3 tool steel using Copper and Brass as electrode and Aluminium (Al) as powder by utilising PMEDM process, an experimentation has been carried out. During experimentation, pulse on and off time, peak current and powder concentration are considered as input process parameters. From the experimental results, it is noted that with mixing of aluminium powder in dielectric medium, surface roughness has increased significantly. Moreover, it is seen that powder concentration of 1 g/l at 1 A peak current giving better surface quality of AISI-D3 steel. This indicates the enhancement of Electrical Discharge Machining (EDM) performance dispersing aluminium powder in dielectric fluid.
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