Volume 11, Issue 1, February 2021

Illustration of the temperature dependence of the activation threshold for desorption at low levels of surface filling with deposited atoms: the presence of two curves indicates a rearrangement of the surface structure.

The sample have wide impedance-spectra, demonstrating three relaxation processes separated by frequency. An equivalent scheme has been proposed and its parameters have been calculated, satisfactorily describing the electrical characteristics of the preparation.

Polymer сomposites with a concentration of 20 wt. % polyethylene and 80 wt. % iron exhibit extrinsic piezoresistance of about 30% in the pressure range of 0–170 kPa

The degradation processes occurring in massive inclusions of the chromium-nickel cast iron carbide phase during deformation at high temperatures (400-600 ºС) are studied. The effect of the local deformations on easy slip of dislocations is considered. We also demonstrate that during the dislocation slip, the new phases appear and the energy dissipates.

The value and relationship between the degree of elastic anisotropy and the Poisson's ratio of Ti-Ni alloy crystals are analyzed on the basis of our own and literature data obtained experimentally and computationally from the first principles. The elastic anisotropy of Ti-Ni crystals can be determined based on numerical differences in the extreme values of μ as Aµ = / µmax - µmin|/<μ>. A strong correlation was established between the elastic anisotropy coefficient A and the factor Aµ (the correlation coefficient 0.9871).

The influence of the annealing atmosphere on the electrical conductivity and thermo-EMF of strontium orthocuprate (Sr2CuO3) at temperatures up to 150°C has been investigated. It was shown that during heat treatment in hydrogen or in an atmosphere saturated with water vapor at temperatures above 70°C ionic current carriers appear in Sr2CuO3.

Scheme of passivation of compact samples.

The relation of the coefficient n in the equation hmax=1/nπ ((K1C (KC ))/σ0.2 )2 (where hmax is the maximum depth of the plastic zone under the fracture surface) with the criterion of the local stress state hmax/t for CG and UFG materials with BCC, FCC and HCP lattice when testing samples for static crack resistance

The dependences of the critical value of the disclinations dipole strength on the mesodefect length obtained at various values of the strength of the planar mesodefect are shown. The regions of parameters for which stable cracks can exist for each of the given values of the strength of the planar mesodefect lie above the corresponding curves.

Schematic of the magnetic pulse installation for tensile testing.

Ni-14(Al, Ta)-30.7(Co, Cr, W, Hf) (wt.%) superalloy microstructure.

Iron atoms in solid solutions of magnesium-bismuth niobate have the charge state of Fe3+.

The paper emphasis on CNT-Al6065 Metal matrix composite for experimental investigations of mechanical and tribological behaviour. Surface modification on CNT were performed to avoid the agglomeration.

Schematic representation of boron nitride composed of nitrogen (red) and boron (blue) atoms.

Dependence of residual stresses on the energy of electrospark processing and a method for their determination.

Based on the obtained experimental data a physically motivated model is formulated for the ferritic transformation with allowance for the effects of deformation and concurrent recovery of austenite. The model is first to evaluate variation of nucleation barriers owing to the hydrostatic component of internal stresses at austenite grain boundaries.

Investigation of deformation heating during ECAP using the Deform-3D complex for mathematical modeling.

Diagram of sample preparation in making steel subjects of research by methods of transmission electron microscopy.

Magnetocaloric effect in as-cast Gd2In

Spatially localized breather excitations are investigated for the model of a discrete Heisenberg spin chain, which includes an antisymmetric exchange interaction and single-ion anisotropy of the easy-plane type. Taking into account the antisymmetric exchange leads to the excitation of only antisymmetric magnetic discrete breathers.