Preparation and mechanical properties of graphene reinforced-Al7075 composite by semi-solid sintering

Graphene reinforced-Al7075 composite was successfully prepared through ball milling mixing powder and semi solid sintering method. The influences of graphene on the microstructures and mechanical properties of Al7075 composite were investigated by scanning electron microscope (SEM), energy dispersive spectrometer (EDS), and static tensile tests. The results show that, the graphene nanoflakes are well dispersed in Al7075 matrix. Compared to the Al7075 matrix without the addition of graphene, the density of graphene reinforced-Al7075 composite decreases, the Vickers hardness and tensile strength increase by 14% and 32%, respectively, and the elongation shows a slight drop.