Microstructural aspects of grain growth kinetics in non-oriented electrical steels

Physically-based modeling of grain growth kinetics after primary recrystallization in different types of non-oriented electrical steel is discussed. As a first approximation, the effect of Zener drag on normal grain growth is considered. The ferrite grain growth behavior during secondary recrystallization was analyzed by applying the general equation for grain growth. The activation energy for grain boundary motion in both semi-processed and fully processed steels is calculated. An idea of anisotropic mobilities is applied to the columnar grain growth description. It is shown that the value of activation energy for columnar grain growth along the normal direction is higher than the one along the rolling direction.