Experimental study of surface modification of aluminium 7075 alloy by reverse EDM process using SiC-Cu powder metallurgy green compact electrode and Taguchi experimental design
by Lokesh Kumar Ranjan; Sujoy Chakraborty; Uttam Kumar Mandal
International Journal of Machining and Machinability of Materials (IJMMM), Vol. 25, No. 3/4, 2023

Abstract: In this work, an attempt has been made to alter the surface of Al-7075 substrate using SiC and Cu powder mixed electrodes in Die sink EDM. Experiments have been carried out using Taguchi L-9 orthogonal array. There are three input parameters in this experiment like compaction load, peak current, and tool composition. Analysis of variance (ANOVA) and main effect analysis have also been performed for the output responses like material deposition rate (MDR), tool wear rate (TWR) and surface roughness (SR) respectively. Material deposition rate of 0.385 (mg/min), tool wear rate of 4.37 (mg/min), average surface roughness of 2.101 (μm) and average layer thickness of 25.01 μm have been successfully achieved. Furthermore, examining the nature of surface geology; scanning electron microscope (SEM), energy dispersive spectrometer (EDS) and X-Ray diffraction (XRD) analysis have also been performed which supports the transfer of tool ingredients over work piece samples with enhanced surface characteristics.

Online publication date: Fri, 12-Jan-2024

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