Experimental Investigation of Friction Stir Processed Al7075 Aluminium Plate Reinforced with Al₂O₃/1% Gr Hybrid Surface Nanocomposite

Hybrid Metal matrix composites provide huge opportunities to optimize the engineering enforcement in metal matrix composites for applicable in the automotive and aerospace industries, where unique filler content and selective protected areas of reinforcements are needed. There are various efforts have been carried out to study the mechanical action of particle reinforced aluminium based composites. In this present study, Friction stir processing (FSP) is used to carry out reinforcement study on the commercially available Al7075 Al sheet metals reinforced with aluminium oxide of different sizes (75μm,150μm & 200μm) and percentage (2%, 4%, 6% & 8% -Al2O3) and 1% graphite (Gr). It has been described that these composites showed significant development in hardness, strength and related properties, as well as improved wear performance compared to fundamental alloys. It is well known that MMC's containing small-size reinforcements which are ideal materials for application in high performance and wear resistant components due to their appealing physical and mechanical properties. To meet the above requirements, the samples were subjected to microstructure examination and hardness study. It was noted that there is significant improvement in the hardness value and the grain size was considerably reduced.