Title: Experimental investigation on surface integrity in machining of Inconel X750 with WEDM using Taguchi technique

Authors: Mandeep Kumar; Hari Singh

Addresses: Department of Mechanical Engineering, National Institute of Technology, Kurukshetra, India ' Department of Mechanical Engineering, National Institute of Technology, Kurukshetra, India

Abstract: The objective of the present work is to investigate the effects of various WEDM process parameters such as pulse on time, pulse off time, servo voltage, peak current, wire tension and wire feed rate on the surface roughness of the machined samples. The analysis of variance was carried out for raw data as well as for signal to noise ratio. Four input parameters have been found to be statistically significant for their effects on the response of interest. The optimum value of surface roughness was obtained at pulse on time - 110; pulse off time - 51; spark gap voltage - 65 V; peak current - 90 A; wire feed - 11; wire tension - 5. The confirmation experiments were also performed for validating the predicted results. Scanning electron microscopy was performed on the machined samples to investigate the effect and microstructure of the samples after machining.

Keywords: machining; optimisation; ANOVA; SR; Inconel; Taguchi; WEDM; GRA; scanned electron microscopy; SEM; recast layer.

DOI: 10.1504/IJPMB.2018.095057

International Journal of Process Management and Benchmarking, 2018 Vol.8 No.4, pp.516 - 530

Received: 27 Jun 2016
Accepted: 12 Nov 2016
Published online: 01 Oct 2018 *

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