Electrochemical Micromachining of Hastelloy Using Cu-NaBr Nanoparticles Mixed Electrolyte

摘要

Electrochemical micromachining (ECMM) is mostly used for producing micro holes, micro slots, and micro channels. In this research work, copper nanoparticles were mixed with sodium bromide electrolyte for machining Hastelloy C276. The aim of this work is to find the influence of nanoparticles mixed electrolytes on the machining performance when machining voltage, electrolytic concentration, and amount of nanoparticles will improve the MRR, overcut feature, and the surface roughness of the micro holes. Machining performance was evaluated on the basis of MRR, radial overcut and surface roughness. Experimental results were correlated through the use of Taguchi-data envelopment analysis ranking (DEAR) based multicriteria optimisation method in order to find optimised parameter setting level. Based on the experimental results, nanoparticles mixed electrolytes were found playing a vital role in ECMM with increase in MRR and reduction in overcut and surface roughness at the optimized parameter setting level at machining voltage of 7 V, electrolyte concentration of 5 g/L and nanopowder suspension of 5 g/L.