Influnce of grain size on dynamic recrystallization of AZ31 magnesium alloy rolling sheet

摘要

Microstructure evolution characteristics and the influence of the intial grain size on the dynamic recrystallization of AZ31 were investigated by rolling at deformation temperature of 280°C, 30% reduction and strain rate of 5.6 s~(-1). The results indicate that under the present deformation condition, when the grain size is 6.2μm the dynamic recrystallization does not occur, twinning dynamic recrystallization (TDRX) occurs when the original grain size are of 7.9μm and 12.7μm, when the original grain size is 21.1μm rotating dynamic recrystallization (RDRX) occurs.