Experimental investigations on nano powder mixed Micro-Wire EDM process of inconel-718 alloy

摘要

This research investigates the effect of graphite nano powder suspended in dielectric medium of Micro-Wire EDM process of inconel alloy. The main influencing parameters such as voltage, capacitance, and powder concentrations were considered. The machining characteristics of material removal rate (MRR), kerf width (KW) and surface roughness (SR) were investigated. Twenty seven experiments were carried out based on full factorial design by varying voltage, capacitance and powder concentration each at three levels. Data were analyzed using Design Expert software. It is from the experimental investigations show that the presence of graphite nano powder in the dielectric can improve the topography and roughness of the machined surface significantly especially R-a values reduced from 0.830 mm to 0.418 mu m in addition to higher material removal rate of 0.0055 mm(3)/min. The higher material removal rate as well as good surface quality was achieved at graphite nano powder concentration of 0.5 g/l, capacitance of 0.01 mF and Voltage of 100 V. (C) 2019 Elsevier Ltd. All rights reserved.