Effect of Differential Speed Rolling on Microstructure And Mechanical Properties of AZ31B Magnesium Alloy Sheets

The grain size and the distribution of crystal orientation have an important effect on the mechanical properties of wrought AZ3 1B magnesium alloy sheets. Because the AZ3 1 B magnesium alloy sheets rolled by conventional rolling have a poor formability at room temperature, a new rolling technology of differential speed rolling is used to improve the mechanical properties of AZ31B magnesium alloy. The research shows that the number of twinning crystal decreases, the number of the core of dynamically recrystallized grain increases, and the grain size become fine and isotropy by differential speed rolling with the increase of the reduction and the improving of the rolling temperature to some extent. The differential speed rolling not only improves the isotropy of the basal texture and also improves the microstructure and mechanical properties.