Effect of heat treatment on tensile properties of component with macro-interface between unreinforced magnesium and composite

The microstructural and mechanical characteristics of component with the ma cro-interface between unreinforced magnesium and composite manufactured by squeeze casting were determined. The effect of thermal cycling on the tensi le properties of the component with the macro-interface, which is a potenti al site of cyclic stress formation, was investigated. The macro-interface h as diffuse interface characteristics; its thickness is about 7-10 mum. A re action product was formed near the macro-interface. It has been found that the component are weaker than pure magnesium, and the tensile strength of t he component decreases with thermal cycling as a function of both the numbe r of thermal cycles and DeltaT. The fracture behavior was evaluated by the study of fracture surfaces on both sides of the component fractured at the macro-interface.