Experimental investigation of WEDM on titanium hybrid composite reinforced with boron powder: a novel approach

This manuscript presents an experimental investigation based on a novel optimization algorithm known as desirable grey relational analysis (DGRA) where desirability function is coupled with grey relational analysis for multi-objective optimization. The experimental and predicted results are compared with multi-criteria decision making method like fuzzy technique for order preference by similarity to ideal solution (FTOPSIS) coupled with fuzzy analytical hierarchy process for criteria weights. Experimental analysis is done on wire electro-discharge machining of a developed novel titanium hybrid composite fabricated by laser engineering net shaping process varying power, time off and peak current as main input process parameters. Response surface methodology is used on Box-Behnken design model (3-factors/3-levels) having output responses like material removal rate, surface roughness, kerf width and over cut. Satisfactory outcomes are obtained and authenticated by confirmatory test. To check and confirm that models are significant, analysis of variance is used. Optimal solution is obtained by desirability approach to achieve the best output response which is further improved by 1.75%, 0.73% and 1.02% when compared with desirability to FTOPSIS, FTOPSIS to DGRA, and desirability to DGRA respectively.