Semi-solid Constitutive Parameters and Failure Behavior of a Cast AA7050 Alloy

AA7050 is an aluminum alloy with superior mechanical properties; however, it prone to hot tearing (HT) during its production via direct-chill casting. This study focuses on extracting constitutive parameters of the thermomechanical behavior in semi-solid state as well gaining insight failure behavior. Tensile tests were performed using Instron 5944 at solid fractions between 0.85 (550 °C) and 1.0 (465 °C), deformation rates 0.2 2 mm/min. The results showed that there are three regimes this fraction range: ductile (T = 465 ≤ fs < 0.97 473 brittle 0.9 485 then again (at 550 °C)). Fracture surface analysis revealed fracture mode was mostly intergranular propagating through bridges well. Semi-solid obtained by making a simple thermal model numerical tensile ALSIM software package comparing simulation experimental tests. extracted available information from literature support fact more susceptible HT than AA5182 Al-2 wt pct Cu alloys. can further enhance predictive capability computer simulations