Performance analysis of Cu-B4C metal matrix composite as an EDM electrode Online publication date: Sat, 23-Aug-2014
by V. Senthilkumar; M. Chandrasekar Reddy
International Journal of Machining and Machinability of Materials (IJMMM), Vol. 11, No. 1, 2012
Abstract: Performance of electrode materials is one of the important factors that determine the quality of the machined component and the cost involved in the operation of electro discharge machining (EDM) process. Low electrode wear resistance in graphite and copper electrodes necessitated the development of sintered composite electrodes for EDM operation. In this paper, authors attempted to develop a new copper-based metal matrix composite (Cu-B4C) to get an optimum combination of wear resistance, electrical and thermal conductivity. Here the copper-boron carbide composite was developed through powder metallurgy route and EDM experiments were carried out using mild steel specimen. Copper composite with 40% boron carbide reinforcement exhibits better metal removal rate (MRR) and tool removal rate (TRR) compared to conventional copper electrode. SEM and XRD results show the surface modification and formation of boron, B4C reinforced layer on the surface of mild steel work piece when machined with composite electrode.
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