上产克大睾 Recrystallization SHEAMGRAI DUAD TONO UNTVEEETTY Laws of recrystallization A minimum deformation to initiate recrystallization:to provide a nucleus and the necessary driving force to sustain its growth Recrystallization temperature decreases as increasing anneal time:thermally activated;relationship between recrystallization rate and temperature is given by the Arrhenius equation Recrystallization temperature decreases as increasing strain:The stored energy (providing the driving force )increases with strain.Both nucleation and growth more rapidly occur in a more highly deformed material. ▣ The recrystallized grain size depends primarily on the amount of deformation, being smaller for large amounts of deformation.(Higher strain will provide more nuclei per unit volume and hence a smaller final grain size). Institute of Forming Technology Equipment 24Recrystallization Institute of Forming Technology & Equipment 24 Laws of recrystallization  A minimum deformation to initiate recrystallization: to provide a nucleus and the necessary driving force to sustain its growth  Recrystallization temperature decreases as increasing anneal time: thermally activated; relationship between recrystallization rate and temperature is given by the Arrhenius equation  Recrystallization temperature decreases as increasing strain: The stored energy (providing the driving force ), increases with strain. Both nucleation and growth more rapidly occur in a more highly deformed material.  The recrystallized grain size depends primarily on the amount of deformation, being smaller for large amounts of deformation. (Higher strain will provide more nuclei per unit volume and hence a smaller final grain size)