극저온 압연 및 온간 압연 기술을 이용한 5052 알루미늄 합금의 기계적 성질의 향상

The effects of deformation temperatures and post-deformation annealing on mechanical properties, in conjunction with microstructural evolution in the 5052 AI alloy, were investigated. The combination of cryogenic rolling with warm rolling effectively increased tensile strength and yield strength without the decrease of ductility through the formation of ultra fine grains with dynamic recovery in the 5052 Al alloy. And static annealing, as a post heat treatment, enhanced the ductility. Therefore, ultra-fine grained 5052 Al alloy with high strength and a moderate level of ductility could be made by the combination of cryogenic rolling with warm rolling and the additional static annealing process.