Dynamic microstructural evolution of an Al-Zn-Mg-Cu alloy (7075) during continuous heating and the influence on the viscoelastic response

Fig. 1 GP zones volume fraction and η′/η phase volume fraction vs. temperature under continuous heating at a constant heating rate of ≈ 1 K/min. The GP zones volume fraction is obtained from APT and from a reaction rate model accounting for diffusion controlled growth (with soft impingement) and redissolution. The η′/η phase volume fraction is obtained from SEM and from the Avrami equation.57