Experimental Investigation of Mechanical Characterization of Semi Solid Aluminium 7075 Alloy

Abstract

The goal of this work is to improve the heat processing parameters for extruded 7075 alloy, which are important to achieve the thixoforging spheroidal grain structure. The compound and the base alloy casted into a steel mould were studied side by side in the microstructure and the mechanical behaviour of the composite. The present work describes the synthesis of Al7075 semi solid metal matrix composite reinforced with graphene and the characterization of their microstructure and mechanical properties.  Graphene is added to aluminium-7075 and samples are prepared both with stirring and without stirring at varying temperatures. The samples are prepared at 6800c, 7100c, 7400c, 7700c, 8000c, 8300c, 8600c, 8900c, 9200c.These samples were additionally pressed in a special tooling by which tensile test samples were obtained. The implementation of the composite casting approach led to a dendritic transformation into a dendritic base alloy structure. The mechanical properties of the composite are improved in relation to the base alloy.