Abstract
Electro-discharge machining is an extensively used process for machining of hard-to-cut materials. The process necessitates a conducting tool electrode; however, selection of right material for preparing the tool continues to remain an engineering challenge. This work makes use of a hybrid intelligent algorithm for selecting the right electrode out of three tool electrodes such as composite tool manufactured by laser sintering process (AlSi10Mg), copper and graphite for efficient electro-discharge machining of Ti6Al4V. The work began by constructing a Taguchi’s L27 experimental design and then collecting the output data such as the material removal rate, tool wear rate, surface roughness, surface crack density, white layer thickness and micro-hardness. A multi-objective optimization is proposed to maximise the work piece material removal rate while minimize the remaining output responses. For this purpose, a hybrid grey-TOPSIS based quantum-behaved particle swarm optimization is chosen. Additional data gathered from scanning electron microscopy and energy dispersive spectroscopy techniques reveal new insights into the post-machining material behaviour such as the use of graphite electrode makes the machined surface far harder due to the dissociated carbon.
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Acknowledgements
Marco Leite would like to acknowledge the support provided by FCT, through IDMEC, under LAETA, Project UIDB/50022/2020. Saurav Goel greatly acknowledges the financial support provided by the UKRI via Grant No. EP/T001100/1 and EP/T024607/1 and Royal Academy of Engineering for assisting with the Grant No. IAPP18-19\295 and TSP1332.
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Sahu, A.K., Mahapatra, S.S., Leite, M. et al. A hybrid Grey-TOPSIS based quantum behaved particle swarm optimization for selection of electrode material to machine Ti6Al4V by electro-discharge machining. J Braz. Soc. Mech. Sci. Eng. 44, 188 (2022). https://doi.org/10.1007/s40430-022-03494-y
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DOI: https://doi.org/10.1007/s40430-022-03494-y