Optimizing Solution Heat Treatment to Improve Mechanical Properties of Al Alloy 7055
The influence of one- and two- stage solution heat treatment on the microstructure and mechanical properties of aluminum alloy 7055 was investigated. The results showed that in the case of one-stage solution heat treatment in the range of 450 °C to 470 °C, the strength increased while the ductility decreased with temperature. Further increasing temperature led to more dissolution of soluble constituents but a large amount of recrystallization, therefore, the strength decreased while ductility increased. The two-stage solution heat treatment, which included first stage of low-temperature-long-duration and second stage of high-temperature-short-duration heating was suggested for improvement of mechanical properties.
Yafang Han et al.
J.H. You et al., "Optimizing Solution Heat Treatment to Improve Mechanical Properties of Al Alloy 7055", Materials Science Forum, Vols. 546-549, pp. 877-880, 2007