A review of dynamic recrystallization phenomena in metallic materials

Deformation mechanism and microstructure evolution during on-line heating rolling of AZ31B Mg thin sheets

“…Recrystallization is the formation of new grains with high angle grain boundaries (HAGBs) in a deformed material [12]. In discontinuous dynamic recrystallization (DDRX), the new grains are formed by the nucleation and the growth of new, stain-free, fine, randomly-oriented, grains during deformation at an elevated temperature.…”

“…The new strain-free grains restore ductility [13]. In discontinuous dynamic recrystallization, the new, recrystallized grains are typically nucleated at existing grain boundaries and the new grains are fine and equiaxed [12]. In contrast, continuous dynamic recrystallization (CDRX) occurs when sub-grains are formed with low angle grain boundaries (LAGBs) during hot deformation, and these sub-grains turn into gains with high angle grain boundaries (HAGBs) with increasing deformation.…”

“…In contrast, continuous dynamic recrystallization (CDRX) occurs when sub-grains are formed with low angle grain boundaries (LAGBs) during hot deformation, and these sub-grains turn into gains with high angle grain boundaries (HAGBs) with increasing deformation. Thus, the low angle grain boundaries transform into high angle grain boundaries by a progressive increase of the mis-orientation [12]. As a result, large strains produce a strong crystallographic texture [12].…”

“…Thus, the low angle grain boundaries transform into high angle grain boundaries by a progressive increase of the mis-orientation [12]. As a result, large strains produce a strong crystallographic texture [12]. The key difference between these two mechanisms of dynamic recrystallization is that discontinuous dynamic recrystallization is discontinuous, whereas continuous dynamic recrystallization is continuous [12].…”

“…As a result, large strains produce a strong crystallographic texture [12]. The key difference between these two mechanisms of dynamic recrystallization is that discontinuous dynamic recrystallization is discontinuous, whereas continuous dynamic recrystallization is continuous [12]. TDRX results in the nucleation of grains of new orientations [14].…”