-
Article
Structure and Magnetoresistance of Co–Gd and Al–Co–Gd Alloy Films
Structural data and dependences of the film resistance on magnetic field strength R(H) are presented for Co–Gd and Al–Co–Gd alloy films obtained by vacuum sputtering. It has been found that amorphous Co55Gd45 fil...
-
Article
Formation of a Gradient Structure in a Material by Twist Extrusion
Hexagonal samples with an initial coarse-grained structure (CG) in the near-axis zone and a gradient ultrafine-grained (UFG) structure at the periphery are formed by twist extrusion (TE) of commercial-purity c...
-
Article
Self-Organization of Dimensional and Concentration Diversity in a CNx : EuyOz Film Clusterized Structure
The structure of diamond-like CNx : EuyOz films obtained by magnetron sputtering of a composite carbon–metal–oxide target in a nitrogen atmosphere has been examined. It has been shown that the components of the t...
-
Article
Self-Organization of Multiscale Structural Groups in a Low-Carbon Wire Subjected to Severe Drawing
The peculiarities of the mechanical parameters and atomic structure of wires made of 08G2S steel subjected to severe drawing with a combination of shear and classical circular drawing of different diameters. T...
-
Article
Dynamic Effects in a Defective System of Crystal
Works devoted to studying the interaction between dislocations and structural defects in a crystal lattice in the dynamic region of velocities are considered. Analytic expressions for the force of dynamic drag...
-
Article
Nature of the Thermodynamic Reversibility of Structural and Phase Transitions at Variation of the Temperature of Severe Plastic Deformation
The temperature dependence of the conditions of formation of limiting (steady) structural states at severe plastic deformation of amorphous alloys has been theoretically analyzed. Within an approach based on p...
-
Article
Producing of ultrafine grained composites with a large uniform elongation by twist extrusion: Mathematical simulation
The conditions of production of a composite material of the ultrafine grained shell–coarse-grained core type are determined by mathematical simulation of twist extrusion. A combination of regions with ultrafin...
-
Article
Multiscale structural changes of atomic order in severely deformed industrial aluminum
The regularities of multiscale structural changes in the atomic order of the aluminum alloy AD-1 after a severe cold plastic deformation by conventional rolling in smooth rolls or in rolls with relief recesses...
-
Article
Cyclic character of the evolution of the defect structure and the properties of metallic materials during megaplastic deformation
The principle of nonequilibrium evolution thermodynamics is applied to describe the cyclic evolution of the defect structures in metallic materials subjected to megaplastic (severe) plastic deformation. A unim...
-
Article
Diversity of the disorder and different-scale order during variations of severe deformation of copper
The systematic features of structural changes in the atomic order and disorder in copper samples after severe deformation of a copper bar by shear rolling were studied. Shear rolling was performed in rolls wit...
-
Article
Basic patterns of the generation of high-angle grain boundaries and the physical and mechanical properties of FeNi alloys upon severe plastic deformation
The evolution of the structural parameters of deformation fragments and dynamically recrystallized grains in FeNi alloy are analyzed by means of transmission electron microscopy and back-scattered electron dif...
-
Article
Nature of high-angle grain boundaries in metals subjected to severe plastic deformation
The evolution of structural parameters of deformation fragments and dynamically recrystallized grains during severe plastic deformation in a Bridgman chamber as the number of complete revolutions in torsion at...
-
Article
Exercising control by changing the modulus of the ferromagnetic order parameter of twisting deformation
The distribution of the ferromagnetic order parameter (OP) is studied for an easy-axis type of ferromagnet under the effect of intense flow twisting applied along and perpendicular to the easy axis of a sample...
-
Article
Self-organization of the structure in the Cu60Fe40 composite during deformation-thermal treatment
The deformation-thermal stability of a clusterized amorphous-crystalline structure prepared from a Cu60Fe40 powder mixture at a logarithmic strain e = 4.6 and subjected to isochronous (40 min) annealings at T ...
-
Article
How is one to determine the ductility of the ultrafine grained materials produced by severe plastic deformation?
It is shown that the relative elongation to failure does not reflect the plastic properties of the ultrafine grained materials produced by severe plastic deformation. The use of the relative reduction of area ...
-
Article
Influence of screw extrusion on the atomic order in constructional steel
The atomic order in low-carbon steel strained by screw extrusion making the microstructure finer and changing the phase ratio in the material is studied by X-ray diffraction analysis. The steel is found to con...
-
Article
Effect of laser irradiation on the structure and properties of dielectric column clusters in the YBaCuO superconducting films
The effect of laser irradiation on the structure and properties of the YBa2Cu3O7 − δ epitaxial super-conducting films (T c = 90–91 K) that are grown on the SrTiO3 and LaAlO3 substrates is studied....
-
Article
Magnetic properties and thermal modification of nanostructured films of nickel nitrides
Nanostructured films of nickel nitrides (from Ni to Ni2N) have been synthesized by magnetron sputtering of a nickel target in an argon atmosphere with the addition of 0.2–70 vol % nitrogen. Magnetization saturati...
-
Article
Structure and magnetoresistance of a Ni79.7Fe14.0Co2.8Zr2.0Cu1.5 thin film
The structure and magnetoresistance R of thin films based on Ni80Fe20 permalloy doped with Co, Zr, and Cu have been examined by X-ray diffraction analysis and resistance measurement. The films have been obtained ...
-
Article
Synthesis and magnetic properties of nanocolumnar nickel films deposited in argon-nitrogen atmosphere
Ferromagnetic nickel films with a structure comprising nanocolumns grown perpendicular to a substrate have been obtained by magnetron sputtering of a nickel target in argon atmosphere containing 2 vol % nitrog...
