Flow Stress Behavior of 2519 Aluminum Alloy Under Hot Compression Deformation

The flow stress behavior of 2519 aluminum alloy during hot deformation conditions was studied by isothermal hot compression on Gleeble 1500.The deformation temperature is range from 300℃ to 500℃ and the strain rate range from 0.05 s -1 to 25 s -1 .The experimental results indicated that the flow stress of 2519 aluminum alloy increases with increasing strain and tends to be constant after a peak value at lower strain rates ( e· ≤25 s -1 ),showing dynamic recover.The flow stress sawtooth fluctuates after a peak value with the increasing strain at higher strain rates ( e· ≥25 s -1 ),showing discontinuous dynamic recrystallization.The deformation activation energy of 2519 aluminum alloy during hot deformation is 167.81 kJ/mol from Arrhenius equation.