Optimization in Tribological Behaviour of Al-BN-TiO2 Composites Using D-Optimal Method

Abstract

The aluminium hybrid composite processed powder metallurgy and wear behaviour was experimentally investigated on aluminium with 0.5 wt% nano-BN reinforcement combined with nano-TiO2 weight per cent reinforcement of 0.3, 0.5 and 0.7% at different sliding velocities ranging from 1.5 to 2.5 m/s and different normal loads ranging from 5 to 15 N. The effect of specific wear rate and coefficient of friction was optimized using D-optimal method. The results predicted by the developed model are concurring well within the measured values. The correlation coefficient of model, regarding the specific wear rate and coefficient of friction, was about 0.9891 and 0.9805, respectively, with conform the degree of accuracy of the mathematical model. The optimal condition attained the minimum specific wear rate and coefficient of friction at sliding velocity 1.5 m/s at normal load 14.36 N for Al + 0.5 wt% BN + TiO2 0.3 wt% composite. The optimal predicted value of specific wear rate was 0.00043e-9 mm3/Nm and coefficient of friction 0.66, respectively.