THE INFLUENCE OF STRONG MAGNETIC FIELD ON THE PROCESSES OF RECOVERY IN CRYSTALLINE IRON-BASE ALLOYS AND CRYSTALLIZATION IN AMORPHOUS IRON-BASE ALLOYS

The paper covers the study of the issue of the structure forming in the process of annealing affected by the strong magnetic field in the iron-base alloys. Such surveys became rather significant in recent years, as the specifying of mechanisms of strong magnetic fields interaction with the processes taking place in solid bodies is very topical from both the fundamental and the practical points of view. Despite the activity of the researchers and the availability of a number of works, this issue remains open to the present time, and the information and the explanation given in scientific literature contradict one another very often. The paper gives experimental data obtained in the result of specimens annealing under the conditions of the strong constant magnetic field of 6, 10 and 20 T. During the annealing, the processes of recovery of cold-rolled deformed Fe-3 % Si and Fe-50 % Ni alloys. The authors studied the structure, the magnetic properties, and the microhardness and determined that the magnetic field delays the recovery processes in the crystalline deformed alloys and causes the formation of nucleuses with the easy direction of magnetization. It is associated first with the magnetic field influence on the motion of dislocations. Moreover, the authors carried out the crystallization of Fe₈₁Si₇B₁₂ amorphous alloy produced by quenching on the drum. In amorphous alloys, the crystallization in the conditions of strong magnetic field causes the increase in the produced grain size in comparison with the crystallization without the field. The authors have not determined any magnetic field influence on the alloys texture crystallized from amorphous state.