The Influence of Recrystallization on the Temperature Dependence of Twinning in Magnesium Alloys

The nucleation of twin formation, an important mechanism in the deformation of magnesiumMagnesium alloys, is still an active topic of discussion. The twin formation is generally tied to the amount of shear stress resolved on the twin system. This work sheds light on the formation of twins by studying the deformation in three different Mg alloys. The alloys are deformed at 350C. The flow curves show the signature of dynamic recrystallizationRecrystallization in all the alloys. The resultant microstructures are studied optically and using electron backscatter diffraction maps. The results clearly show the formation of dynamic recrystallized (DRX) grains is primarily located inside the twins. The volume fraction of DRX and twins is calculated using ASTM E562-02 standard from the optical micrographs. The volume fraction of DRX and twins thus calculated shows inverse correlation. Thus, indicating that the increase in the DRX leads to decrease in the amount of twinningTwinning by reduction in the conditions conducive for twin formation.