Experimental investigation of plain and nano-graphene oxide mixed dielectric

Abstract:
The current research investigates the machinability of a novel Nimonic alloy through electro-discharge machining by assessing Material Removal Rate, Tool Wear Rate, and Surface Roughness. The machining was conducted using plain dielectric and Graphene Oxide (GO) nanoparticles (5 g/l) mixed dielectric considering both Copper and Brass electrodes. The novelty lies when machining with nano GO mixed dielectric. It was observed that the use of Copper electrodes in machining of the alloy in nano GO mixed dielectric results in superior quality machining, demonstrating enhanced performance. The key findings include the identification of optimal parameters, where Vg of 70 V, Ton of 200 µs, Fp of 0.5 kgf/mm2 maximize MRR (16.231 mm3/min) and minimize TWR (0.0062 mm3/min) and SR (5.1423 µm). The microstructural study of the machined surface and sustainability study along with the detailed comparative analysis of responses assures the superiority of machining in a Nano GO mixed dielectric-Cu electrode environment.

Citation:
Behera, A., Sahoo, A. K., & Mahapatra, S. S. (2025). Experimental investigation of plain and nano-graphene oxide mixed dielectric for sustainable EDM of Nimonic alloy using Cu and Brass electrode: A comparative study. Measurement, 241, 115659.