Multi-response Optimization of WEDM Parameters Using an Integrated Approach of RSM–GRA Analysis for Pure Titanium


Wire electrical discharge machining is widely used in the application where precision is of prime importance, especially for conductive materials. In this study, central composite design of response surface methodology is implemented to design the experiments for optimization of WEDM process parameter on pure titanium. The identified input process variables are pulse on time (Ton), discharge current and pulse off time (Toff), while surface roughness and material removal rate are the output variables. ANOVA was used to study significance and non-significance factors. Grey relational analysis has been used for obtaining an optimal parameter setting for WEDM process to maximize the cutting rate while reducing surface roughness for pure titanium, which is the most preferred material for aerospace and biomedical application. The optimized process parameters were found at Ton of 6 µs, Toff of 4 µs and discharge current of 6 A after implementing GRA technique. A very close relation has been obtained at an optimal condition using GRA after the validation trial.

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Correspondence to Jay Vora.

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Chaudhari, R., Vora, J., Parikh, D.M. et al. Multi-response Optimization of WEDM Parameters Using an Integrated Approach of RSM–GRA Analysis for Pure Titanium. J. Inst. Eng. India Ser. D 101, 117–126 (2020).

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  • WEDM
  • Pure titanium
  • RSM
  • Grey relational analysis
  • SEM