Selective growth of {110}〈001〉 grains in the temperature gradient annealing has been
studied in Fe–3%Si alloy. As grains grow, the average
deviation angle from the ideal {110}〈001〉 orientation becomes smaller and orientation
distribution changes corresponding to that of coincidence grains
in the matrix. Secondary recrystallization temperature depends on
the orientation of secondary recrystallized grain and sharper
{110} 〈001〉 grains grow preferentially at lower temperatures.These phenomena are explained by modified Hillert's model of grain growth. Interfacial
energy of coincidence boundary is lower than that of general
boundary. Therefore, sharper {110}〈001〉 grains, which have higher frequency of coincidence grains in the
primary recrystallized matrix, suffer lower pinning effect from the second phase particles
and thus grow preferentially at lower temperatures.