Microstructure and properties of asynchronous rolling AZ31 magnesium alloy sheets during annealing at 200

3

50℃ for 30

1

20 min were analyzed.Homogenization and grain size in the AZ31 magnesium alloy sheets are nearly independent of the holding time during annealing at 200℃.Recrystallization is basically completed in the alloy sheet with annealing at 300℃ for 30 min and uniformly fine equiaxed grain can be observed

however

with increasing holding time to 60 min

partial recrystallization grain is coarsened.Furthermore

with annealing at 350℃ for 30 min and for 60 min

the completion of recrystallization companying with the coarseness of grain size can be observed.Tensile strength at room temperature and elongation of the AZ31 magnesium alloy sheets with annealing at 300℃ for 30 min reach 315MPa and 33%

respectively

exhibiting desirable properties.