In the present study, 2024 Aluminum Alloy was subjected to Cryogenic Rolling Process. The main objective was optimization of structure and mechanical properties of a 2024Al alloy. For this purpose, parameters such as strain, temperature and time of ageing after cryogenic rolling was evaluated. Standard metallography practices as well as mechanical tests, FE-SEM and DSC were performed on the samples. Dislocation density was also calculated by XRD test. It was found that solution treatment at 495 degC for 55 minutes before the cryogenic rolling, %85 rolling and 6 hrs holding time at 160 degC after the rolling led the optimized properties. By applying the optimal parameters, Ultimate strength was increased to almost 650 Mpa (almost 200 Mpa more than that of the as received 2024 Al alloy), almost 170 HV hardness (almost 40 HV more than that of the as received 2024 Al alloy), and almost %10 elongation was achieved. Results showed the low temperature in cryogenic rolling prevented the dynamic recovery during deformation. Therefore a high density of dislocation will remain in ageing step which can act as a potential recrystallization sites for S (Al2CuMg) phase precipitates. By this process, a good combination of strength and ductility was achieved in 2024Al alloy. Keywords : 2024 Aluminum Alloy, cryogenic rolling, bimodal
