B. K. Sokolov

Anisotropy of the local atomic structure in Fe-(5–6 at. %) Si single crystals as the cause of formation and stability of induced magnetic anisotropy

Fe1 − xSix (x = 0.05–0.06) single crystals were prepared and subjected to various heat treatments for structural studies. X-ray diffuse scattering measurements detected an anisotropy of regions with local B2-type atomic ordering in samples with induced magnetic anisotropy. It was shown that the average size of ordered clusters as measured along an applied dc magnetic field during heat treatment is slightly larger than that in a transverse direction and reaches 10 Å. Such anisotropy of B2-type regions is not observed in magnetically isotropic samples obtained by rapid quenching or by annealing and cooling in a rotating field (or in the absence of an external field). A comparative analysis of the atomic structure, domain structure, and hysteresis loop shape in samples subjected to various treatments demonstrated a correlation between the short-range order and magnetic properties.

Atomic structure of soft magnetic Fe-Si alloys with induced magnetic anisotropy

The atomic structure of iron-based alloys with 5–6 at. % Si has been studied using X-ray diffraction. It has been shown that the average size of B2-ordered clusters existing in these alloys depends on the sample prehistory (on the preparation method). Thermomagnetic and thermomechanical treatments were used to produce states with a desired type of magnetic structure. The largest size of B2 clusters was obtained in the direction of the magnetic anisotropy after it was induced. Based on the results of simulation of diffraction patterns, the microstructure of clusters was interpreted as consisting of adjacent pairs of B2 cells surrounded by distorted cells of the bcc matrix.

Effect of deformation inhomogeneities on the formation of texture during cold rolling and annealing of nickel single crystals

Structure and texture of rolled nickel single crystals of various initial orientations have been studied in some detail. Special attention has been paid to the specific features of the deformation mesostructure and the possibility of formation of nuclei of primary recrystallization of cube orientations in it.

Effect of Deformation Texture Component Composition on Cube Texture Formation during Primary Recrystallization in Ni-Based Alloys

Deformation and primary-recrystallization textures in nickel alloys with some metals (Nb, to 5.4%; W, to 7.4; Re, to 4.1%; Mo, to 9.3%; V, to 10.1%; Mn, to 22.1%; Al, to 12.0% and Cr, to 22.0%) has been studied depending on the content of alloying elements and the rolling temperature. The dependence of the type of recrystallization texture on the component composition of the deformation texture has been established.

Influence of RollingTemperature on the PerfectionDegree of RecrystallizationCube Texture in Nickel

The effect of the rolling temperature on the deformation texture and the perfection degree of a cube texture in pure-nickel thin tape were investigated. The kinetics of primary recrystallization was studied on samples that had undergone rolling at different temperatures and the temperature of the onset of secondary recrystallization was determined. Regularities of the structure formation in the samples are discussed. It is established that the cube texture with the maximum sharpness is produced in the samples rolled at room temperature.