Effects of Cu content on microstructure and mechanical properties of rheo-diecasting Al-6Zn-2Mg-xCu alloys

Abstract

Despite the high cost and difficult production process, the 7xxx (Al-Zn-Mg-Cu) wrought aluminum alloys are still widely used in aerospace industry due to its wellperforming mechanical qualities and superior fatigue resistance [1][2][3] . Recently, there has been a booming interest in producing cast Al-Zn-Mg-Cu alloys with the goal of lowering production costs and developing shaped products while maintaining outstanding mechanical qualities [4] .Several processes, such as spray deposition, electromagnetic casting, powder metallurgy, semi-solid casting and quick solidification, have been employed