EDM INVESTIGATION OF AL 7075 /B4C/ZRO2 HYBRID METAL MATRIX COMPOSITE BY APPLYING RESPONSE SURFACE METHOD

The Aluminium Metal Matrix Composites (AMMC's) provides high strength and stiffness to the metals, so it is utilised in the applications like robots, high speed rotating shafts, high speed machinery etc. The AMMCs requires a fabrication process to improve its mechanical properties. Some of the previous researches has been involved in applying the reinforced AMMC's in Electrical Discharge Machining (EDM) to analysis its characteristics. In this research study, the hybrid AMMC's is used in the EDM process to analysis the optimum input conditions. The combination of Al7075, Boron Carbide (3%), and Zirconium dioxide (15%) are utilized for analysing the EDM process. The Stir Casting method is used for fabrication of hybrid AMMC's. In addition, Orthogonal array is used to analyse the parameters; Tool Wear Rate (TWR), Surface Roughness (SR) and Maximum Material Removal (MRR) rate on the basis of voltage (V), current (I), pulse-on time (????????????) and pulse-off time (????????????????). By varying the input parametric values like ????,????, ???????????????? and ????????????, the output performance measures; TWR, SR and MRR are analysed in the experimental section. The experimental analysis shows that the optimal value of the input parameter is V is 60, I is 8.242, TON is 5.01 and TOFF is 6 and has the output parameter of MRR is 0.4613, TWR is 0.0139 and SR is 2.46. The experimental investigation shows that current is most influence parameters affects the MRR, TWR and SR.