Microstructure Evolution and Dynamic Recrystallized Model of 5083 Aluminum Alloy During Hot Deformation

In order to improve the formability of 5083 aluminum alloy in hot forming process. The effects of strain rate, temperature and elongation on microstructure evolution of 5083 aluminum alloy were analyzed by single tensile test at high temperature on RG2000-20 universal thermal tensile tester and numerical analysis. The results show that the smaller the strain rate, the larger the grain size and volume fraction of dynamic recrystallization, the lower the deformation temperature, the smaller the dynamic recrystallization degree and the larger the cavity size. Dynamic recrystallization occurs only when the deformation degree exceeds the corresponding boundary value. When deformation reaches a certain degree, the completely dynamic recrystallization can be obtained, and the volume fraction and void radius will increase rapidly. Furthermore, a dynamic recrystallization mathematical model of 5083 aluminum alloy for high temperature plastic deformation was established by linear regression method and proved to be reliable in numerical analysis.