Simple orientation relationships for secondary recrystallization in Si-Fe

Abstract

Reorientation due to primary recrystallization in (111) [112] oriented single crystals after 70 pct reduction in thickness was found to occur by rotations of approximately 25° to 30° and in such a way as to produce one strong component and several weak components. The strong component had the (110) [001] orientation. Upon further annealing secondary recrystallization occurred, but without the formation of new components. The (110) [001] orientation disappeared and some of the weak components of the primary recrystallization texture failed to produce identically oriented components in the secondary recrystallization texture, but other weak components developed into components of the secondary recrystallization texture. As a result the latter were related to the cold rolled orientation by rotations of approximately 25° to 30°. The results obtained could be explained rather simply in terms of the oriented nucleation growth selectivity theory wherein large grains (primaries) from weak components of the primary recrystallization texture grew into secondary recrystallization grains (secondaries) having the 25° to 30° rotation relationship with the cold rolled orientation.