Flow Stress Behavior of 2524 Aluminum Alloy During Hot Compression Deformation

The flow stress behavior of 2524 aluminum alloy under hot deformation conditions was studied by isothermal hot compression on Gleeble-1500.The deformation temperature is rang from 300~500℃and the strain rate range from 0.01~1 s-1.The results indicated that deformation temperature and strain rate attect the size of flow stress,the flow stress of 2524 aluminum alloy increases with increasing strain and tends to be constant after a peak value,showing dynamic recover,and the peak value of flow stress increases with decreasing of deformation temperature and increasing of strain rate.When the strain rate is 10 s-1,and the deformation temperature is more than 300℃,the flow stress saw tooth fluctuates,showing dynamic recrystallization.The deformation activation energy of 2524 aluminum alloy under hot deformation is 216.647 kJ/mol when the flow stress described by temperature-compensated strain rate Zener-Hollomon parameter.In the deformation of isothermal hot compression,the fleasible deformation temperature and strain rate are high strain rate(0.5 s-1)or 0.01 s-1~0.02 s-1 and 440℃~500℃.