Influence of SiC on Tribological and Mechanical Properties of Aluminium Based Metal Matrix Composite for Brake Drum Applications
For the last few years there has been a rapid increase in the utilization of aluminium alloys, particularly in the automobile industries, due to low weight, density, coefficient of thermal expansion, and high strength, wear resistance. The aim of this project is to improve the mechanical properties of aluminium alloy by addition of SiC. Aluminium material has an exclusive advantage of light weight and high thermal conductivity whose enhancement is the need for the hour. This is done with the help of stir casting process, in which the base material (Aluminium) is heated inside the furnace and in its molten state the various constituent materials are added in specific quantity at specific temperature followed by stirring at a speed. Among the materials of tribological importance, Aluminium metal matrix composites have received extensive attention for practical as well as fundamental reasons. In our project, the influence of SiC on the mechanical behavior of Al 7075 composites is identified. Al 7075 particle reinforced composites were produced through stir casting in the composition of 2%, 4% and 6% by weight ratio. The samples of Al 7075 composites were tested for hardness, tensile, impact, wear and SEM analysis. The test results showed increasing hardness, impact strength and co-efficient of friction of the composite. Since it has high co-efficient of friction it can be utilized for brake drum applications in light weight automobiles.