A Study on Microstructrual and Fatigue Behaviour of Al-7075-B4c-Wc Hybrid Composite Material

Composite materials are emerging chiefly in response to unprecedented demands from technology due to rapidly advancing activities in aircrafts, aerospace and automotive industries. These materials have low specific gravity that makes their properties particularly superior in strength and modulus to many traditional engineering materials such as metals. Fatigue is a major issue concerning the use of aluminum composites in structural applications. Fatigue leads to weakening of material majorly due to the strain bands formed in the material when it is subjected to repeated loading; the damage that occurs due to fatigue is a progressive and localized one. Henceforth in the current work, fatigue behavior of boron carbide and tungsten carbide dispersion strengthened high performance hybrid Al 7075 metal matrix composites are evaluated. The main purpose of fatigue characterization is to distinctly evaluate the life cycle of components that are fabricated from metal matrix composites and eventually develop a framework model for the significant study of fatigue strength of the structure with persistent striations all along the interstitials of aluminum-boron carbide and tungsten carbide interfaces.