Friction and Wear Properties of Al7075-BA-Gr Hybrid Composites

Abstract

The experimental investigation of A7075 matrix reinforced with Bagasse Ash (BA) particle with 1,3,5,7,9,11 and 13wt% composites was fabricated by stir casting technique and also hybrid composites processed at 5wt% Gr with same wt% of BA particles. The abrasive wear behaviour of composites was carried out by using dry sliding pin on disc machine. The various parameters affects like applied load, sliding speed, wt% of BA particle and Gr particles were considered for this study of wear resistance and friction effect under dry sliding condition. The wear rate and coefficient of friction are found by effecting parameters such as increase in load (10, 20, and 30 N), increase in sliding speed (0.42, 0.84, and 1.68 m/s) and wt% BA (1,3,5,7,9,11 and 13t%) has been obtained. The effect of load and speed on dry sliding wear rate and coefficient of friction performance of Al7075 casting alloy and its composites was evaluated using a pin-on-disc with three different loads and three different speeds at room temperature. Significant effect of factors and conditions was identified, experiments results shows that, the wear rate and coefficient of friction increased with increase in load and decreased with increase in sliding distance, however the coefficient of friction decreased with increasing sliding speed before stable state reached. The influence of graphite particle performs as self lubricant element towards controlling the wear behaviour shows in hybrid composites which improves wear resistance. This investigation use of Taguchi method to minimizing experiments wear rate and coefficient of friction AMMCs. A experiments plan, based on orthogonal array L9 design used to obtain signal- to- noise ratio of response parameters wear rate and coefficient of friction. Finally analyzing effected parameters and results shows that optimal combination and compatible level of affecting parameters.