7075Al-SiC, Composites at Room and Elevated Temperatures

摘要: Particulate reinforced Al matrix composites exhibit superior elevated temperature strength in addition to high specific strength and stiffness at room temperature". Several studies have investigated the mechanical behavior of SiC, reinforced 2XXX, 6XXX and 8XXX Al al-loys laying a greater emphasis on the role of SiC, and the effect of strain rate on mechanical properties at elevated temperatures". However, reported literature on the elevated temperature strength properties of high strength Al-Zn-Mg-Cu alloys reinforced with SiC, in general and those fabricated by casting in particular, is inadequate. It is important to provide a broad data on the mechanical properties and the fracture behavior of these composites at high temperatures especially to seek an enhancement in service temperatures for monolithic 7XXX alloys which are used in aircraft and automotive applications. The present work addresses the role of …