Flow Stress Behavior of 7056 Aluminum Alloy During Hot Compression Deformation at Elevated Temperature

The flow stress behavior of 7056 aluminum alloy during hot compression deformation was studied by thermal simulation test on Gleeble 1500 system. The deformation temperature is from 300 ℃to 450 ℃ and the strain rate is from 0.01 s-1 to 10 s-1. The results show that the flow stress increases with the increase of strain and tends to be constant after a peak value. The peak stress increases with the increase of strain rate, and decreases with the increase of deformation temperature, which can be represented by a Zener-Hollomon parameters in the hyperbolic sine equation, and the hot deformation activation energy is 224.3826 kJ/mol.