Effect of hot extrusion and optimal solution treatment on microstructure and properties of spray-formed Al-11.3Zn-2.65Mg-1Cu alloy

The Zn-rich Al-11.3Zn-2.65Mg-1Cu alloy was prepared by spray forming rapid solidification technology and then processed by hot extrusion and heat treatment to T6-temper condition. The characteristics of spray-formed and extruded materials are systematically investigated, and accordingly, solution treatment parameters are derived at an intermediate temperature. The tensile results indicate that the alloy can reach yield strength as high as 807MPa due to massive precipitation of. phase which is attributed to the high supersaturation of the solutionized alloy because of the cumulative effect of spray forming and optimal solution treatment. (C) 2019 Elsevier B.V. All rights reserved.