Abstract: The flow stress behavior of 6082 aluminum alloy was studied by single-pass high temperature compression experiment on Gleeble−1500 thermal-mechanical simulator, over a range of temperature of 300−500 ℃ and a range of strain rate of 0.01−10 /s. The results demonstrate that the hot deformation behavior of 6082 aluminum alloy exhibits strain-hardening to a steady-state, and the softening mechanism was mainly controlled by dynamic recovery (DRV). The value of flow stress is significantly affected by deformation temperature and strain rate, which decreases as temperature becomes higher and as strain rate becomes lower, indicating that 6082 aluminum alloy is a positive strain rate sensitive material. The flow stress of this alloy can be represented by Zener-Hollomon parameter function , and values of related parameters A, α and n, are 3.97×1011 s−1, 0.01 MPa−1 and 9.16, respectively. Its activation energy for hot deformation Q is 143.89 kJ/mol.

Key words: 6082 aluminum alloy; hot compression; constitutive model