Volume 13, Issue 2, June 2023

Video frames of the observation of the effects of hydroluminescence on hydraulic oil: the beginning of the "glow"; developed hydroluminescence; attenuation of the glow due to pressure drop.

The test sample before and after SPF

The LPSO phase in magnesium alloys raises their ignition temperature by ≈100°C in the as-cast state and by ≈200°C in the heat-treated state

The magnetoresistive effect of the samples in initial state reached 3.25 % in magnetic field of 10 kOe. It was established that the composites structure, magnetoresistivity and magnetic properties are steady against thermal heating.

It is shown that with an increase in temperature, load, and holding time, the volume fraction of pores decreases, and the fraction of fiber increases, which leads to an increase in the composite strength. In all cases, the shape of the fracture surface indicates the brittle nature of the composite fracture.

The value of the nitrogen compositional stability coefficient has been determined for the alloys of the Fe-Cr-Mn-Mo-N system obtained by self-propagating synthesis, namely, aluminothermy under nitrogen pressure. The obtained results permit to predict the maximum possible content of nitrogen in continuous ingots (without bubbles and gas porosity in the volume) and, consequently, the structural-phase composition of alloy and optimal regimes of alloying.

The effect of combination of isothermal cryorolling at liquid nitrogen temperature to strains ranging from 30 to 90% and subsequent high-dense electropulsing, on the structure and hardness of an initially coarse-grained pure nickel was studied.

Cyclic voltammograms and Nyquist diagrams, SEM images of microstructures of film samples

2D image and SEM micrograph of worn surface of Fe66Cr10Nb5B19 amorphous coating obtained at 60% of explosive charge.

Simulation of hydrides’ morphology in zirconium in 3D representation assuming classical heterogenous nucleation and diffusion growth with taking into account the mutual influence of neighbors.

Images of samples obtained at a temperature of +5 ° demonstrate a completely different morphology in comparison with samples obtained at +25°, demonstrate a completely different morphology in comparison with samples EDX elemental mapping indicated that the particles contain mainly Cu and O in both samples.

Seebeck coefficient S and the power factor Р for the composite оf CuO - 40%, LiCoO2 - 30%, LSMO - 25%, GeO2 - 5%.

The results of this work demonstrate improved wear resistance of the Ti6Al4V-Cu alloys, because copper provides refining the β-grains and consequently α- and α′ crystallites.

It is shown that necessary the homogenization annealing and subsequent quenching for getting one phase state of Ni44.4Mn36.2Sn14.9Cu4.5 alloy.

New two-dimensional structure - diamane have been studied by molecular dynamics simulation. The stiffness constants are calculated from molecular dynamics and then applied to analize Young's modulus, shear modulus, and Poisson's ratio.

As cast Al-1.8Mn-1.6Cu-0.15Cr-0.15Fe (wt. %) alloy structure consist of aluminum solid solution, eutectic Al6(FeMn) and Al2Cu, as well as Al7Cr and Al20Cu2Mn3 dispersive particles. Radial shear rolling results in partial dissolution of Al20Cu2Mn3 dispersoids, grain refinement to the size of 1.6 μm, increasing yield stress up to 83 MPa and ultimate strength up to 216 MPa. The plasticity of the deformed alloy is 25%.