Investigation on the effect of electrolyte on machining of metal matrix composite through electro chemical machining

Abstract

newline Electrochemical machining ECM is one of the important machining process for machining alloys and composites Aluminium composites are gaining importance in aerospace and automobiles industries The effect of ECM process input parameters namely voltage electrolyte concentration and duty cycle on Al7075 alloy is studied with acidified infra red heated electrolyte The formation of hole depth on the specimen in X plane and Y plane were investigated Based on the experiments the acidified sodium nitrate NaNO3 heated electrolyte shows better hole depth to the room temperature electrolyte Based on the preliminary experiments L27 Orthogonal Array OA experiments were planned The input process parameters such as voltage temperature of the electrolyte type of tools and the thickness of the work piece is varied and its effect on material removal rate MRR and surface roughness SR were studied on Al7075 alloy The results of the experiments are analysed using Technique for order of preference by similarity to ideal solution TOPSIS and Analysis of variance ANOVA As per the analysis voltage at 7V electrolyte temperature at 27ºC aluminium electrode and work piece thickness of 12 mm shows the higher MRR and low SR newlineFurther two different composition of specimen were prepared ie Al 7075 with 5 and 10 mass fraction of boron carbide B4C AMMCand#8223;s The prepared specimens are machined using ECM by varying one parameter at a time The input process such as electrolyte temperature electrolyte concentration voltage and duty cycle were considered to study the machining speed diametric overcut DOC and Delamination factor DF newline newline