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    Effect of Heat Treatments on Tribological Characteristics of Hot-Extruded AA7075-SiCp Composites
    (Gazi Univ, 2017) Matik, Ulas; Tanatti, Kubra
    The effect of T6 and T73 tempers on microstructure, hardness and tribological performance of hot-extruded reinforced with 32 mu m sized SiC particles reinforced AA7075 Al matrix composites produced by hot-extrusion of powder metal compacts was investigated. For this purpose, the cold pressed AA7075 powder metal compacts with various SiC contents were extruded into 12 mm rod bars at 480 degrees C. The microstructure, hardness and tribological characteristics of T6 and T73 tempered samples were examined with scanning electron microscopy (SEM), energy dispersive x-ray analyzer (EDX), brinell hardness and adhesive wear tests. The results showed that the hardness and wear resistance of composites increases depending on the increase of SiC particle content. It was also determined that T6 tempered samples showed better hardness, friction and wear performance compared to T73 tempered samples.