Annealing Textures of Heavily Rolled 50%Ni-Fe Thin Sheets

The present investigation was undertaken to study the annealing textures of 50%Ni-Fe alloy specimens which were heavily rolled to a very much reduced thickness and the recrystallization mechanisms of (100) [001] texture component are discussed. (1) It has been recognized that the rolling textures of this alloy indicate the copper-type up to this time, but it is unable to simply describe as the copper-type texture since it shows a peculiar texture under such an extreme rolling condition. (2) Very weak (100) [001] texture component still remains in a deformed matrix but this component decreases still more, after a heavy reduction higher than 99.4% or in a thinner sheet than 20 μ. (3) The number of nuclei of (001)[100] recrystallization texture component has a mutual relationship with the intensity of (001)[100] texture component in a deformed matrix. (4) Cube component decreases remarkably and the components similar to rolling textures increase gradually in proportion to the reduction of thickness after annealing. (5) It is considered that the preformed nucleation model, proposed by Beck and Cahn is appropriate to account for the recrystallization mechanism, but it would be rather more rigorous to express it as "the orientated nucleation and interacted growth theory"