Investigating the EDM parameter effects on aluminium based metal matrix composite for high MRR

Abstract Aluminum based hybrid metal matrix composite have found extensive applications in field of automobiles. This paper investigates the significant effect of machining parameters like pulse-on time (T-on), pulse-off time (T-off), voltage (V) and current (I) on material removal rate (MRR). In this study the aluminum metal matrix composite with SiCp and Grp was casted. Hybrid Aluminum metal matrix composite was machined using one tool materials (Copper) of ɸ12 mm for experiments. The design matrix and mathematical models were developed by RSM (response surface methodology) using the Design expert 9.0.6 software. The experimental results show the impact of change in parametric values on material removal rate for hybrid metal matrix composite. To check the signification of model the ANOVA (Analysis of variance) technique was used. The SEM (Scanning electron microscope) was done to study the surface characteristics of the machined samples.