Articles

 


№1 | №2 | №3 | №4 | №5 | №6 | №7 | №8 | №9 | №10 | №11 | №12





1.
dx.doi.org/ 10.18577/2307-6046-2017-0-12-1-1
УДК 621.791.14
Lukin V.I., Ovsepyan S.V., Koval’chuk V.G., Samorukov M.L.
The peculiarities of rotational friction welding of superalloy VG175

The research of technological schemes (the sequence of welding and heat treatment operations) influence on the mechanical properties and the structure is carried out. The influence of technological heatings with a 300 hours duration and 650°C temperature on the weld’s structure and mechanical properties is studied. Friction welding parameters and optimal sequence of welding and heat treatment that allow getting the most high mechanical properties are determined.

Read in Russian

2.
dx.doi.org/ 10.18577/2307-6046-2017-0-12-2-2
УДК 621.791.14
Lukin V.I., Kulick V.I., Bezophen S.Ya., Lukinа E.A., Sharov A.V., Panteleev M.D., Samorukov M.L.
Friction stir welding of high-strength aluminum-lithium V-1469 alloy semiproducts

The influence of heat treatment on the mechanical properties, corrosion resistance and structure of welds manufactured from high-strength aluminum-lithium V-1469 alloy pressed panels friction stir welded on the optimal welding parameters was investigated. The investigation of mechanical properties and corrosion resistance shows that the usage of technological scheme: welding+solution+ageing allows to obtain the following level of weld properties – σUTS weld≥0,83σUTS BM, KCU≥134 kJ/m2, IGC: 0,09 мм, layer corrosion of the weld: 3 point.

Read in Russian

3.
dx.doi.org/ 10.18577/2307-6046-2017-0-12-3-3
УДК 669.017.165
Klochkov G.G., Ovchinnikov V.V., Klochkova Y.Y., Romanenko V.A.
Structure and properties of sheets from workable aluminium alloy V-1341 of Al–Mg–Si system

The task of development of industrial technology of rolling of thin sheets from V-1341 alloy Al–Mg–Si system alloyed by calcium is solved in present paper. The temperature of hot rolling is also chosen, the influence of the modes of heat treatment on structure and mechanical properties of sheets is investigated. Results of complex researches of industrial sheets 1,5 mm thick from the V-1341 alloy are presented. The anisotropy of mechanical properties of sheets in various conditions of heat treatment is investigated, structural and phase researches are conducted, the crystallographic texture and a complex of technical characteristics at cold shaping is estimated. Comparison with Al–Mg group alloys is carried out.

Read in Russian

4.
dx.doi.org/ 10.18577/2307-6046-2017-0-12-4-4
УДК 669.295:539.26
Panin P.V., Dzunovich D.А., Lukinа E.A.
Calculation of benchmark X-ray diffraction intensities for α- and β-phases in titanium alloys

Benchmark X-ray diffraction intensities for α- and β-phases in titanium alloys have been improved with the help of polycrystalline samples of α-alloy VT1-0 and β-alloy Ti–3Al–7Mo–5,5Cr (% wt.). In order to achieve statistically significant data for each sample the corresponding X-ray diffraction patterns have been obtained in four different non-orthogonal macroplanes. Theoretical calculation of specific integral diffraction intensities for h.c.p. and f.c.c. lattices of α- and β-phases has been accomplished in accordance with kinematic theory. As a result a number of averaged normalized diffraction intensities for α- and β-phases have been obtained, the intensities being suitable for direct use in quantitative phase and texture analysis of various titanium alloys.

Read in Russian

5.
dx.doi.org/ 10.18577/2307-6046-2017-0-12-5-5
УДК 678.8
Kraev I.D., Popkov O.V., Shuldeshov Е.М., Sorokin A.E., Yurkov G.Yu.
Prospects for the use of organosilicon elastomers in the development of modern polymer materials and coatings for various purposes

In this paper, organosilicon polymers, as well as composite materials of various purposes on their basis, were considered. The most important properties of organosilicon compounds were identified, which caused their wide application in various spheres: aircraft and rocket engineering, electronics and radio engineering, construction, and medicine. A brief review was carried out in the field of modern silicone sealants, rubbers, paint and varnish materials, materials for electrical and thermal insulation, medical supplies, as well as modern composite materials. Various applications and methods for the modification of silicone rubbers, in particular polydimethylsiloxane rubber, and others have been considered. Special attention was paid in the article to organosilicon stair block copolymers. A number of polymer and composite materials obtained on its basis, include sound-absorbing material, as well as biocompatible coatings, are described.

Read in Russian

6.
dx.doi.org/ 10.18577/2307-6046-2017-0-12-6-6
УДК 678.8
Veshkin E.A, Satdinov R.A., Postnov V.I., Strelnikov S.V.
Modern polymer materials for manufacture of elements of the air conditioning system in flying apparatus

The analysis of imported materials for the manufacture of air conditioning ducts has been carried out and, based on it, the basic minimum requirements for the Russian materials being developed are determined. Сompositions for flexible and rigid SCR elements were selected, and technological parameters for the manufacture of GRP for rigid SCR elements were investigated and worked out. A new domestic glass fiber reinforced plastic for the manufacture of rigid elements of air ducts SKV was developed. The study of its properties is carried out.

Read in Russian

7.
dx.doi.org/ 10.18577/2307-6046-2017-0-12-7-7
УДК 620.1:678.8
Veshkin E.A, Postnov V.I., Semenychev V.V., Krasheninnikova E.V., Ershov V.V.
On the effectiveness of curing blanks from polymer concrete with a polyether matrix by an ultraviolet irradiator

Samples from cured polyester resin and polymer concrete, made on its basis, were treated with an ultraviolet irradiator for two minutes to two hours. On the initial samples and samples subjected to ultraviolet irradiation, the microhardness values and the width of the grooves obtained with the help of a laboratory sclerometer with a load on a diamond indentor of 10 N were evaluated. It was shown that with increasing duration of ultraviolet irradiation, the microhardness values increase, and the width sclerometric grooves decreases. The increase in the degree of polymerization of the samples leads to the alignment of the shoreline grooves.

Read in Russian

8.
dx.doi.org/ 10.18577/2307-6046-2017-0-12-8-8
УДК 678.8
Donetskiy K.I., Dushin M.I., Mischun M.I., Sevastyanov D.V.
Some features of semi-pregs application for vacuum formation of polymeric composite materials (review)

Increase in demand for designs from polymeric composite materials (РСМ) has demanded decrease from cost value and as a result, search of replacement to rather expensive and autoclave formation which is now the main way of manufacturing of the high-loaded products. Use of vacuum formation of prepregs has not shown satisfactory results in view of receiving plastics with the high maintenance of time. As one of solutions of this problem, it was offered to pass to development of other materials – semi-pregs, consisting of the dry (not impregnated) part of fabric and binding. Many manufacturing firms of materials include in the nomenclature of the materials wide ruler semi-pregs. Semi-pregs are considered by large developers and consumers of polymeric composite materials when manufacturing perspective elements of rocket and aviation engineering of military and civil assignment. Pressure and temperature are important parameters of processing of such PСM, to questions on air removal from semi-

Read in Russian

9.
dx.doi.org/ 10.18577/2307-6046-2017-0-12-9-9
УДК 621.372.8:621.315.61
Beljaev А.А., Bespalova E.E., Payarel S.M.
Installation for measuring the transmission coefficient at ultrahigh frequencies of nonmetallic materials at high temperatures up to 1200°C

In aviation and space engineering are widely used materials allowing the passage of electromagnetic energy – radio transparent materials. In the design of radio-transparent materials, especially multilayer and broadband is a very important point is the determination by experiment of the transmission coefficient (KP) as separate layers of the materials and multilayer material (or parts) in the whole specified frequency range (from decimeter to millimeter wavelengths). One of the most common methods is the measurement of dielectric properties of materials and then calculate KP. However, besides the fact that it is not direct measurement, such measurements are accompanied by errors due to inaccuracy of manufacture of the samples to the dimensions of the waveguide or resonator. In addition, at frequencies above 10 GHz, the dimensions of the waveguide or resonator section become smaller than the inhomogeneities of heterogeneous materials, which makes it impossible to carry out measurements

Read in Russian

10.
dx.doi.org/ 10.18577/2307-6046-2017-0-12-10-10
УДК 669.721.5
Trofimov N.V., Leonov A.A.
Nonstick coating is used for molds and cores of the CTS used in the casting magnesium alloys (review)

We consider non-stick protective coatings that prevent the mold material from adhering to the metal surface of the casting, which ensures its easy extraction. The main task of the non-stick coating is to reduce the mold or rod to mold castings. For this use materials on water or alcohol basis. Paints for molds and rods from cold-hardening mixtures contain gluing additives and refractory components, which makes it possible to increase the strength of the working surface and reduce the scattering of shapes and rods. Coatings are applied with a brush or an atomizer, the rods are painted in one layer, and the molds, depending on the mass of the casting, are in several layers.

Read in Russian

11.
dx.doi.org/ 10.18577/2307-6046-2017-0-12-11-11
УДК 621.793
Artemenko N.I., Simonov V.N., Vlasova D.V.
Research of the titanium nitride deposition process at the MAP-3 ion-plasma deposition unit

A mathematical model of the process of depositing titanium nitride from a vacuum-arc discharge plasma is considered. It is established that the temperature of the substrate during coating depends on arc current and bias voltage. It is established that the specific change in the mass of the sample during coating depends on the arc current, voltage and time of the process. Formulas are proposed for calculating the substrate temperature, the specific change in the sample mass for ion-plasma coating of titanium nitride, as well as the required pressure of the reaction gas in the chamber. The obtained results can be used in the development and planning of the technological process of coating with titanium nitride on the ion-plasma installation MAP-3.

Read in Russian

12.
dx.doi.org/ 10.18577/2307-6046-2017-0-12-12-12
УДК 620.179.118.5:669.017
Raevskih A.N., Chabina E.B., Filonova E.V., Belova N.A.
Electron Back Scatter Diffraction (EBSD) method possibilities for selective laser melted nickel superalloys structure features investigation

By optical and scanning electron microscopy methods together with EBSD-analysis nickel-base superalloy ZhS6K-VI made by a selective laser melting sample structure was investigated. EBSD-analysis application allowed finding structure features, which do not observe during microscopic research: fragments primary orientation existence, which is inherited by melt baths; cracks development on boundaries between fragments with various crystallographic orientations.

Read in Russian