Current issue

Nanostructured NiTi and its tensile behaviour.

The thermokinetics of shape recovery after bending of Ni-rich titanium nickelide was studied. Loading–unloading procedure was carried out in various phase states using isothermal and non-isothermal modes varying loading strain. The two-stage character of shape recovery under heating is revealed; the hypothesis of its origin is suggested.

Grain growth during recrystallization of pure iron with a submicrocrystalline structure formed by high-pressure torsion deformation at cryogenic temperature

(a) Scheme of an arbitrary pole of the sample surface (the edge of every round disc is made up of atoms at the step edges and atoms at the edge): A, C – atoms in the step edge; B – atom in the center of the plane (half of atoms bonds are broken); D – separately placed atom at the edge of the plane (has one non broken bond). (b) Field ion image of the disordered state of the alloy Fe25Pd50Au25. The statistical arrangement of atoms in the crystal lattice shows a chaotic contrast of the surface image. (c) Field ion image of the ordered state of Fe25Pd50Au25 alloy. Fe and Au atoms provide contrast in the field ion image, Pd atoms do not provide contrast.

Friction stir welding of thin aluminum and copper plates produced a welded joint in which a composite-like structure is formed.

The influence of free volume and orientation of the crystallization front relative to the growing crystal on the front movement velocity in nickel was studied by the method of molecular dynamics

This work is devoted to the search for such values of the interaction parameters and the intensity of external fields in a three-layer multiferroic film , at which nontrivial topological magnetic structures are stable in the ground state. To reduce the computational complexity of searching in the parametric space, we use the apparatus of artificial neural networks

CrxAl(Si)yC with a thickness of 3800 nm was deposited by PVD technique Al is chemical bonded with silicon, Si – with carbon and aluminum. Melting and crystallization of Al-Si system reduce the coating protective properties

Array of cubic nanoparticles.

Structures with all C atoms in DPS positions and one or all C atoms in DOS position are mechanically unstable, in other cases, the C atom remained on NOS or DPS position with increased energy

Theoretical model of a spherical pore in a decahedral small particle.

Unlike of our previous report the method suggested takes into account consideration the initial stage of superplastic forming, when the pressure of the inert gas changes from the initial zero level to a pre-given constant value. It is shown that such kind refinement enables one to improve considerably the accuracy of calculating the value of the strain rate sensitivity index, m, and, as a result, to provide more accurate finite element description of the superplastic forming processes.

The Al-C interaction in graphene-coated aluminum nanoparticle and Al@C60 metallofullerene is studied with DFT approach.

The structure of a sample obtained by consolidation of four sheets of CP Ti was examined. It was shown that the quality of bonding between the sheets decreases from the bottom to the top and the formation of a joint of satisfactory quality was accompanied by a change in the microtexture, weak grain growth and the formation of a subgrain structure.

XRD and SEM results of the fracture of the resulting hollow rod.

An ultrasonic treatment prevents the formation of cavities and allows to produce the NiTi sample at higher pre-heating temperature. An increase in pre-heating temperature increases the width of reacted zone that leads to efective infleunces of the USV on the sample structure.

The presence of N and S atoms which spread evenly on the hydrogel structure was confirmed by energy-dispersive x-ray (EDX) mapping. The introduction of NS doping into the rGOH structure improves the sample's electrochemical performance compared to the undoped sample.