Application of TOPSIS to Optimize EDM Process Parameters for Small-Hole Drilling of Inconel 718
This work examines the best and worst input parameters such as current, capacitance, on-time, and off-time, which articulate the electrical discharge machining for small-hole drilling of Inconel 718. Inconel 718 is difficult to machine by usual machining processes and found applications in aircraft industries, rocket component, gas turbine parts, and cryogenic tanks. This work makes the use of commercial brass tube electrode having 300 μm diameter. The experimental campaign is prepared using RSM (central composite design), and a TOPSIS model is displayed to identify the best and worst process parameters in EDM, which influence several performance characteristics such as overcut, circularity, electrode wear rate, material removal rate, and taper angle. The intended technique can be used to select best and worst machining parameter among the various sets of combinations of machining parameter in EDM for small-hole drilling.
KeywordsInconel 718 TOPSIS EDM Small-hole drilling Brass tube electrode
The authors would like to thank College of Engineering, Guindy, and Central Workshop Division, for providing the necessary facility for performing all kinds of measurements.
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