Abstract
FABRICATION OF AL7075 METAL MATRIX WITH VARYING COMPOSITIONS OF REINFORCEMENTS
Hema Pothur, *Durgesh Koduri and Surya Teja Sandopu
ABSTRACT
In these days the demand for aluminium and aluminium alloys have been increased in the areas like Aerospace, Missiles, Automobiles etc., Generally, Aluminium Metal Matrix composites consists of a low-density material i.e., Aluminium or Aluminium alloy as Base material or Matrix. In this work, Al7075 is considered as the Matrix or Base material and ceramic materials such as B4C, SiC, and Graphite particles were mixed as reinforcing materials for fabrication of Aluminium metal matrix composites through Stir Casting method by varying compositions of reinforcing materials. 0%, 2%, 4%, 8%, and 10% of B4C and SiC were incorporated into Al7075 alloy, maintaining the volume fraction of Graphite particles as 2% for these proportions. Density of Base material and reinforced materials were found using Archimedes? Principle. As percentage of reinforcement increased, density also increased. And to analysis the effect of Silicon carbide, graphite, and boron carbide reinforcements using Micro-Vickers hardness and pin-on-disc experiment. By the addition of reinforcements particles of B4C and SiC, the hardness increased when compared to base material. Wear test demonstrated at 2% Graphite, loss of wear decreased gradually and then it is increased.
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