Hot deformation mechanism and processing maps of 3003 aluminum alloy

Isothermal and constant strain rate compression tests of 3003 aluminum alloy prepared by high-efficient melt-treatment were conducted in the range of 300-500 ℃ and 0.0l-10.0 s-1 on a Gleeble-1500 thermal simulator.The processing map was created based on the dynamic materials model(DMM).Combined with the hot deformation microstructure observation by OM and TEM,the hot deformation mechanism map of the 3003 aluminum alloy was established.The results show that the flow instable zones can be determined by the maps and the analysis of the microstructure,which are corresponding to hot deformation temperature of 300-380 ℃ and strain rate around 1.0-10.0 s-1.The optimal hot processing parameters of hot deformation under the test condition are obtained by the maps as follows: hot deformation temperature of 380-430 ℃ and strain rate around 1.0-10.0 s-1,where the material mainly under goes dynamic recrystallization(DRX).