Volume 8, Issue 4, December 2018

Assembling of pseudo-graphene from grain boundaries with structural units 5-7.

The change in the thermokinetic EMF value as a result of the passage of the cooling zone through a deformed section 0.18 cm in the TiNi alloy

Dependence of an elastic modulus of composition on the basis of secondary polypropelene filled 10 mass part wood flour from content of coupling agent EN13F1F3HH (1), MPP5X (2) and SANUMBUGO F1 (3) in composition.

The combined treatment DCAP + aging 400°С + SPD by friction of the Cu–0.09Cr–0.08Zr SMC alloy gives rise to the friction-induced nanocrystalline structure with grains 15– 60 nm in size in the surface-layer material, which provides a high level of the microhardness and satisfactory tribological properties.

The slip is activated in the systems parallel to the direction of the indenter and thereto at an angle of 45°. Three stages are identified on the F-N curve and the correlation of the stages with the beginning of the shear traces formation is shown.

The frequency dependence of intrinsic permeability of Fe75Si25 particles was shown to depend strongly on the milling conditions

The stages of the evolution of the structure of copper of commercial purity (99.9 wt% Cu) under cryogenic deformation by shear under pressure were studied. Mechanical twinning prevents the formation of a misoriented disperse structure and the development of recrystallization upon heating up to room temperature.

The red squares correspond to the excited cells that generate the main component of the twin structure, marked in orange. The transition to an ideal degenerate twin structure with contacting main components is shown.

Dependences between dislocation substructures parameters in Cu+0.4аt.%Mn alloy and fracture point Х: 1 – density of broken sub-boundaries Мbs; 2 – density of microbands Nmb, 3 – density of microcracks Рcr

Dependence of a Neel temperature TN for bulk phase transition on the exchange integrals relation RS at RSB=RS for films with various thickness D.

Mechanical alloying of titanium and niobium powders occurs under conditions of severe plastic deformation and leads to the formation of the alloy with nanosized structure. Upper limit of produced structure thermal stability is limited to 500°C.

Reconstruction of prior austenite grain boundaries and its verification by the thermal etching in vacuum

Longer silaprismanes are more stable, and their HOMO-LUMO gaps are close to zero.

Discrete breather in the strained Lennard-Jones chain

Silicene is a very promising material for the future microelectronics. The article is devoted to the molecular-dynamic investigation of the behavior of a two-layer silicene located on a silver substrate and interacting with a lithium ion.

Hatching distance effects on microstructure of additively manufactured specimens. Increased hatching distance speed up the manufacturing process, but the porosity level also increases. Reduced hatching distance results in overheating and bubbling of the printed material. The small distance between parts during manufacturing can compensate the increased hatching distance.

It was found that severe plastic deformation (SPD) by the ECAP method leads to the dispersion of intermetallic particles and the weakening of the adhesive bond of the particles with the matrix. In the case of coarse particles, their milling causes a decrease in wear. In the case of fine particles, the weakening of adhesion to the matrix causes an increase in wear.

The best balance of mechanical properties was obtained for the VT25U/TiB composite.

Adding natural fillers of plant origin to composites based on recycled polypropylene gradually increases the thermal conductivity coefficient with increasing filler content.

Approximate analytical solution of the DNA helicoidal model with the damping and constant external force in the radial direction.

BSE images of the superalloy SLZhS-1R subjected hot upsetting at Ts – 10K and heat treatment.

Main stage centrifugal SHS-metallurgy