Abstract
The present work reported the performance assessment of two electrodes, namely copper and tungsten for the electric discharge machining of SUS-316L. The experimental work was performed according to Taguchi’s methodology of orthogonal array considering electrode, current, pulse-on time, pulse-off time as input parameters. Three output responses, i.e., material removal rate, surface roughness, and microhardness were opted for deciding the significance of input parameters on the machined surface. Furthermore, each response was statistically validated using analysis of variance for investing the dominating factors. It was revealed that the current and electrode were the most significant factors affecting all the three responses. For material removal rate, current 28 A (contribution: 55.58%) and copper as electrode material (contribution: 33.92%) noted as significant factors. The roughness of the electric discharge machined surface directly relates to the intensity of spark generated within the working area. Similar findings were observed in the study, current (contribution: 43.29%), pulse-on time (contribution: 19.06%), and electrode (contribution: 13.60%) were the factors which majorly contribute to the roughness of the machined surface. However, tungsten electrode noted as prominent affecting the microhardness of the machined SUS-316L surface. The sample machined at 28 A of current, pulse-on time 90 µs, and pulse-off time 60 µs exhibits the utmost microhardness value with a maximum contribution by current (contribution: 47.84%), followed by electrode type (contribution: 28.92%).
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Singh, G., Mahajan, A., Devgan, S., Sidhu, S.S. (2022). Comparison of Copper and Tungsten Electrodes for the Electric Discharge Machined SUS-316L. In: Srinivasa Pai, P., Krishnaraj, V. (eds) Sustainable Machining Strategies for Better Performance. Lecture Notes in Mechanical Engineering. Springer, Singapore. https://doi.org/10.1007/978-981-16-2278-6_17
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DOI: https://doi.org/10.1007/978-981-16-2278-6_17
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