50%Ni-50%Fe合金における立方体集合組織の成因について

Abstract

In the early stage of the recrystallization process in a cold rolled (96% reduction in thickness) Ni-Fe alloy sheet, it was observed by transmission electron microscopy that the cube-oriented grains were grown mainly in regions adjacent to the band-like structures in the rolling texture which consisted of (110)[1\={1}2] and (100)[001] components. On annealing at 490°∼500°C for 30 min, a high dislocation density region remained in slightly grown cube grains. Such a region was contained at only one site in each cube grain, and its size was comparable with that of the subgrains. It was presumed that the region was the origin of the cube grain, but it was neither the region where any dislocation reactions such as the inverse Rowland transformation had taken place, nor resulted from any impurity effects.It was concluded that the cube grains grew preferentially from the cube components which already existed in the rolling texture.