Flow stress constitutive equation of 01570 aluminum alloy during hot compression

The flow stress behavior of 01570 aluminum alloy during hot compression deformation conditions was studied by isothermal hot compression on Gleeble-1500 hot simulation machine.The deformation temperature range was 300~450 ℃ and the strain rate range was 0.001~1 s-1.The experimental results indicate that the flow stress of 01570 aluminum alloy increases with increasing strain and tends to be constant after a peak value at temperature 300 ℃ and strain rates of 0.01~1 s-1,showing dynamic recover.The flow stress falls down after a peak value with the increasing strain at the other conditions,showing dynamic recrystallization.The deformation activation energy of 01570 aluminum alloy during hot deformation is 152.33 kJ·mol-1 from Arrhenius equation.