Hot deformation and processing maps of 2618 aluminum alloy

The deformation behaviour of 2618 aluminum alloy was investigated by compression tests with Gleeble1500D thermal simulator system. The tests were performed in the temperature range between 573 and 773K and strain rates between 0.01 and 10s~1 . The flow behaviour is described by the hyperbolic sine constitutive equation, and an activation energy of 181kJ/mol greater than the activation energy for self-diffusion in Al is calculated. The processing maps were calculated and analyzed according to the dynamic materials model. The process of hot deformation in the temperature range and different strain rate can be attained by the maps, which hot deformation temperature is 623723K and strain rate is around 0.01s~1 . The warm deformation temperature is approximately 573K and strain rate is also about 0.01s~1 . The instability zones of flow behaviour can also be recognized by the maps.