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        Equation chapter 1 section 1 investigation, analysis, optimization of reciprocating wire-cut electrical discharge machining of titanium alloy with molybdenum electrode

        Anoop Johny,C. Thiagarajan 한양대학교 세라믹연구소 2022 Journal of Ceramic Processing Research Vol.23 No.4

        In this work, titanium grade 2 alloy is evaluated for their machinability behavior using novel reciprocating wire-cut electricaldischarge machining (RWEDM) by changing the wire feed rate, flow rate of dielectric, variable frequency and current as perTaguchi’s approach (L27 orthogonal array) towards maximizing material removal rate (MRR) and minimizing surfaceroughness (SR) and kerf width (KW). A multiple attribute decision method, The Technique for Order of Preference bySimilarity to Ideal Solution (TOPSIS) is implemented for simultaneous optimization of output responses. The ideal conditionobtained is: wire feed of 8 mm/min, flow rate of 15 g/sec, variable frequency of 22 Hz and current density of 220 A. Analysisof Variance identifies that the influence of feed rate of wire electrode is noteworthy with a contribution of 67.12% followedby flow rate and variable frequency. Recast layer on the machined specimens is also evaluated using scanning electronmicroscope (SEM) images which shows lower distortion. A metaheuristic particle swarm optimization (PSO) optimizationmethod is utilized for further optimizing the output responses and is found that the results obtained matches with the resultsof TOPSIS. Finally, a validation experiment is performed with ideal conditions of input parameters and verified.

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