COLD-ROLLING AND RECRYSTALLIZATION TEXTURE FORMATION IN ELECTRO-DEPOSITED PURE IRON WITH A SHARP AND HOMOGENEOUS GAMMA-FIBER

The formation of the cold-rolling and annealing texture has been inves tigated in electrolytically deposited pure iron having a sharply devel oped [111]//ND fiber texture without any anisotropy along gamma-fiber nor any orientation density along other fibers. In no respect of cold reduction, {111}[112] texture is formed after cold-rolling. The same t exture still remains after the recrystallization in the 65% cold-rolle d sheet, whereas the position of the peak is shifted from {111}[112] t owards {111}[110] through recrystallization in the 80% cold-rolled she et. The nucleation texture seems to be responsible for the difference of recrystallization texture between the 65 and 80% cold-rolled sheets . Additionally, it is thought that the growth of the recrystallized gr ains also plays an important role. It is considered that the recrystal lized nuclei with {111}[112] orientation can hardly grow into the defo rmed matrix of the 80% cold-rolled sheet because they frequently encou nter the deformed grains with nearly the same orientation and thus suf fer from a reduced mobility. On the other hand, nuclei with a {111}[11 0] orientation can easily grow into the deformed {111}[112] grains bec ause of the favorable growth orientation relationship between those. C onversely, in 65% cold-rolled sheet, the nuclei with {111}[112] are co nsidered to grow more easily since the frequency of pinning due to lim ited mobility of a low angle grain boundary is rather small, as compar ed to that of the 80% cold-rolled sheet. The same mobility argument as applied to the growth of nuclei seems to hold also for the growth of subgrains, namely, nucleation texture formation.