Abstract

AbstractAttaining improved level of process performance in wire-electro discharge machining (WEDM) at any particular parametric condition is always a complicated task due to the inherent nature of the process. Endeavour to improve one performance measure is always done at the cost of the remaining performance measures. Amongst the performance measures, material removal rate (MRR) and surface roughness (SR) are of interest in this paper and they are contradicting in nature. Thus, the present paper targets to optimize the WEDM performances concurrently using a popular solvere. Particle swarm optimization (PSO) solver for an Iron-based superalloy namely A286 superalloy. To pursue the optimization procedure, the two objectives are clubbed together to form a single objective by the addition of weights. The optimum MRR and SR obtained are 19.90 mm2/min and 3.49 µm respectively. Additionally, field emission scanning electron microscopy (FESEM) is employed to throw light on the morphological characteristics of the machined surfaces obtained by machining at low pulse energy (LPE) setting and at high pulse energy (HPE) setting.KeywordsWire EDMA286 superalloyParticle swarm optimization

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