Flow Stress Behavior of 5182 Aluminum Alloy Under Hot Compression Deformation

The flow stress behavior of 5182 aluminum alloy over the strain rate range 0.05 S -1 to 25 S -1 and the temperature range 300 ℃ to 500 ℃ has been studied on Gleeble-1500 hot simulator. The experimental results show that the steady-state flow characteristics exist during hot compression deformation of 5182 aluminum alloy in the range of experiments. When the deforming temperature is lower, the flow stress decreases after a peak value with the increasing strain at higher strain rates(=25 S -1 ), showing dynamic recrystallization. The flow stress of 5182 alloy during high temperature deformation can be represented by a Zener-Hollomon parameter in the hyperbolic Arrhenius-type equation. A?αand n in the analytical expressions of σ are fitted to be 21.36×10 11 s -1 ?0.017 MPa -1 and 5.23, respectively. The hot deformation activation energy of 5182 aluminum alloy during hot deformation is 195.86 kJ/mol.