To study the effect of different reinforcements on various parameters in aluminium matrix composite during CNC turning

Abstract

Metal matrix composites are catching the eyeballs of various industries because of their enhanced properties like higher strength value over lesser weight, good stiffness and satisfies wide applications throughout. But to bring composite to use, always necessitate some machining process which remain a challenge for its user. In current research work, three Aluminum Metal Matrix composite (AMC) have been prepared by stir casting technique-AMC with eggshell (6% wt, 104 μm), AMC with boron carbide (6%wt, 104 μm) and hybrid AMC(6%wt egg shell+6%wt B4C, 104 μm). After preparation of composites, CNC turning is conducted at fixed process parameters of cutting speed 500 rpm, feed rate 0.1 mm/rev and depth of cut 0.5 mm. After the experiments, the responses such as material removal rate (MRR), surface roughness, residual stress and temperature between tool-work piece interfaces are recorded and evaluated. The experimental study revealed that MRR of hybrid and eggshell AMC's are found 43.24% more than the base alloy. It has also been observed that minimum surface roughness (Ra) of 2.2252 μm has been recorded for hybrid AMC. Base alloy shows the highest value of residual stress both, normal residual stress with value equal to (−) 48.5 MPa as well as shear residual stress with value (+)20.5 MPa whereas maximum average temperature of 51.1 °C recorded for hybrid composite among all the AMC's and base alloy.