Volume 8, Issue 2, May 2018

Synthesized nanostructured WC by the method of electro-thermal explosion under pressure with a temperature above 3500 at a pressure of 20 and 96 MPa.

In this work, a study was made of changes in the surface and near-surface layers of the material during friction to assess the effect of the composition and structure of the antifriction iron-containing aluminum alloy on its tribological properties.

In this paper by X-ray diffraction and optical microscopy was made experimental study of structural state changes in components of mechanically activated Ti + Al powder mixture, irradiated with γ-quanta 60Co.

Cu-Mn-Zr-Ce-O solid solutions were synthesized by co-precipitation method with sonication, and their structure and morphology were investigated

Arrangement of elements in modified surface layers obtained after ESA of steel 45. Alloying material: а) Cr, b) X20Cr13, c) NiCr80-20, d) 12Ni14.

TEM fine structure 0,3C-Cr-3Ni-Mo-V steel after quenching: (a) – lath martensite; (b) – dark field image of retained austenite; (c) – self-tempered martensite; (d) – dark field image of carbides.

The scheme of the simplest intermediate quasi-molecular state model : сirсular orbit with paired electrons between two nuclei

The increasing solutions of the main resonance equations (the dependence of the amplitude of the magnetic breather on time) and the non-increasing solution

Finite element modeling performed in the software product DEFORM-2D accurately predicts the nature of failure at equal-channel angular pressing of Sn11Sb5.5Cu babbitt with different microstructure.

Formation of new polymorphic structures of graphite layers from L3-12 graphene layers

Finite element mesh for a corrugated core panel at the initial and final positions is shown. The way to ensure the formation of a corrugated core panel without external folds by the selection of technological parameters of the SPF process is considered.

Using X-ray diffraction method, the effect of cold (23°C) and warm (200, 400 ºC) high-pressure torsion (HPT, 6GPa, N=1,3,5 full revolutions) on the structural parameters and phase composition of single crystals of high-manganese austenitic steel Fe-28Mn-2.7Al-1.3С (wt. %) was investigated. Regardless of the deformation temperature and the number of revolutions under HPT, steel retains an austenitic structure with high lattice parameter of 3.638-3.653Å; the microhardness of the steel increases, and its magnitude and radial-distribution substantially depends on the HPT temperature.

A fracture locus for the 1 wt% aluminum-graphene metal matrix composite at 300 °C in comparison with that for commercially pure aluminum

The anticorrosive properties of amorphous coatings are improved when tungsten is added to their composition and cobalt is removed compared to the composition where all components are present.

After crystallization the Sn-Y-O films show hydrogen gas-sensitivity properties. Particularly, the injection of hydrogen into argon at 350 °C leads to decreasing of electrical resistance more than 60% for Sn-Y-O nanocrystalline thin film with Y concentration of 4.8 at. %.

The structure of plasma-dusted coatings based on magnesium-substituted hydroxyapatite and calcium phosphate

A method for predicting nonlinear behavior of unidirectional reinforced composite is developed. It is based on nonlinear strain of matrix material described modified relations flow theory to account for the technological defects. The developed approach allows to build stress-strain curves of unidirectional-reinforced composite at tensile along the fibers, at tensile and shear in the reinforcement plane and explore resistance reinforced unidirectional composite complex loading.

The paper presents the results of the studies of the changes in the mechanical characteristics of the welded zone of the bimetal "08Cr18Ni10Ti—steel 10", subjected to staged plastic deformation by rolling. The weld zone obtained as a result of explosion welding was separately considered.

Due to nonparametric criteria, the presence of one or several types of structural elements of the relief on the faces of samples was identified and their scale hierarchy is shown.

Formation of domains of different martensite variants in the bi-crystal with Ʃ25 twist grain boundaries. Molecular dynamics simulations are carried out to reveal the GB effect on the martensitic transformation in bi-crystals of NiTi shape memory alloy. Temperatures of the phase transition are much lower in the bi-crystal with the twist grain boundaries as compared to that having tilt grain boundaries.