Articles

 


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1.
dx.doi.org/ 10.18577/2307-6046-2017-0-3-1-1
УДК 669:018.44:669.245
Petrushin N.V., Elyutin E.S., Raevskih A.N., Treninkov I.A.
High-gradient directional solidification of intermetallic Ni–Al–Ta alloy based on Ni3Al, strengthened by TaC-phase

Directional solidification of process of experimental intermetallic Ni3Al-based alloy of quaternary system Ni–7Al–13,5Ta–0,07С (wt. %) has been investigated. Phase composition of the alloy is γʹ+γ+MC. Directionally solidified as cylindrical bars of Ni3Al-based alloy were successfully grown with a Bridgman process by slow directional solidification (R=6 mm/h) with high thermal gradient (G=12°C/mm). Studied macrosegregation elements and influence macrosegregation on the physicochemical and structural parameters of directionally solidified intermetallic Ni3Al-based alloy (solidus temperature, liquidus temperature, γ- and γ′-lattice parameters and γ/γ′-lattice misfit).

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2.
dx.doi.org/ 10.18577/2307-6046-2017-0-3-2-2
УДК 669.018.44:669.245
Min P.G., Sidorov V.V., Vadeev V.E.
The refining of nickel base single-crystal alloys from silicon, phosphorus and sulfur impurities by directed melt solidification with very slowed-up moving rate of the crystallization

The efficiency of silicon, phosphorus and sulfur contain reducing in single-crystal rhenium-containing superalloys ZhS32-VI and VZhM5-VI by directed moving the crystallization front with rate 6 mm/h. The reducing of silicon phosphorus and sulfur in bottom and middle parts of the casting was founded. The displacing due to directed melt solidification of nonmetallic inclusions to top part of casting was shown. The results were obtain during performance the project of oriented fundamental research №13-0812055_ofi_m.

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3.
dx.doi.org/ 10.18577/2307-6046-2017-0-3-3-3
УДК 621.74.55
Krylov S.А., Evgenov A.G., Makarov А.А., Tonysheva О.А.
The ingot PESR

Today's demands on the quality of metal products and constructions have caused a trend of increasing the share of steel c improved mechanical characteristics in the total volume of steel production, for this reason, in recent years greatly increased interest of High-low-alloy steel with improved strength characteristics. This low content of austenite forming alloying elements presents certain difficulty to introduce nitrogen into the melt. The article describes the main identified defects and suggest ways to prevent them. The work within the framework of an integrated research area 8.2. «High-strength and corrosion-resistant welded structural steel with high fracture toughness» («The strategic directions of development of materials and technologies of their processing for the period till 2030»)

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4.
dx.doi.org/ 10.18577/2307-6046-2017-0-3-4-4
УДК 004.94
Marchenko E.I., Kuzmina N.A., Eremin N.N.
Localization of positions of impurity of carbon in crystal structures of polymorphic updatings of Nb5Si3 according to atomistic computer modeling

The method of atomistic computer modeling was developed consistent model of interatomic potentials, which allowed us to reproduce the crystal structures of three polymorphic modifications of niobium silicide (α-Nb5Si3, β-Nb5Si3, γ-Nb5Si3) with an error no more than 0,6%, as well as to calculate some physical properties. To assess the energy of the entering admixture of carbon atoms in the structure were further developed pair potentials interatomic Si–C, Nb–C and C–C. Two independent methods (Mott–Littleton and simulation in over the cell) first identified the energetically most favorable positions for the impurity atoms of carbon in the investigated structures.

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5.
dx.doi.org/ 10.18577/2307-6046-2017-0-3-5-5
УДК 656.7
Nochovnaya N.A., Nikitin Ya.Yu.
The current state of the question in the field of cleaning of the compressor GTE from operational pollution (review)

Are considered foreign and domestic cleaning technology flow of the gas turbine compressor from pollution (carbon deposits) in the operation and repair of the factory. The advantages and disadvantages of existing clean technologies. It was found that most of the available publications hardly carry experimental data on effect of treatment technologies on the physico-chemical and mechanical properties of the parts to be cleaned. It is shown that further work should focus on applied research in technology to remove carbon deposits from a titanium alloy parts in the factory. Particular attention should be given to finding a resource-saving way to clean parts made of titanium alloys, providing fast and safe removal of carbon deposits without affecting the performance of the cleaned parts.

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6.
dx.doi.org/ 10.18577/2307-6046-2017-0-3-6-6
УДК 006:620.1
Melnikov D.A., Ilichev A.V., Vavilova M.I.
Comparison of standards for carrying out mechanical tests of GRP compression strength

In this work standards (GOST 25.602, state standard specification 4651 ISO 604, ASTM D 6641 – GOST R 56812) for carrying out mechanical tests of GRP on compression are considered. For determination of reliability of the received values on considered standards three types of samples have been made of GRP on the basis of different glass fillers (durable fiber glass fabric and cord fiber glass fabrics and glass roving). These samples have been tested according to standards for testing. Results of the carried-out tests have shown that received values of durability at compression differ depending on standard and then high strength and rigidity of material, subjects disperse values more. It has been established that compression tests of GRP by cord glass fabrics and unidirectional roving to GOST 4651 leads to receiving the underestimated results and high variability of data. The most optimum domestic standard for testing of layered GRP is GOST P 56812. He allows receiving reliable values of durability with the smallest factor of variation.

Work is executed within implementation of the complex scientific direction 13.2. «Constructional PСM» («The strategic directions of development of materials and technologies of their processing for the period till 2030»)

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7.
dx.doi.org/ 10.18577/2307-6046-2017-0-3-7-7
УДК 620.1
Gorlov D.S., Skripak V.I., Muboyadzhyan S.A., Egorova L.P.
The research of fretting-wear slip and ion-plasma coatings

This article provides test data on fretting-wear antifretting coatings developed at VIAM for the last time. Experienced hard lubricant coating VFP-5, slip VPMSA and microcline coating system Ti–TiN, obtained by ion-plasma technology. For the research of the tribological properties was chosen as the method of «finger-plate». According to test results was estimated wear curves, graphs of the coefficient of friction and resistance, the appearance of spots of wear. This work was performed within the framework of strategic directions 17. «Comprehensive anticorrosion protection, hardening, wear-resistant protective and heat-resistant coating», сomplex problem 17.3. «Multilayer heat-resistant and heat-resistant coating, nanostructural hardening of erosion and corrosion-resistant, wear-resistant, antifatigue coating to protect parts hot gas path and compressor of GTE and GTU» («The strategic directions of development of materials and technologies of their processing for the period till 2030»

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8.
dx.doi.org/ 10.18577/2307-6046-2017-0-3-8-8
УДК 620.1
Azarovskiy E.N., Muboyadzhyan S.A.
Research of corrosion resistance surface compressor steel modified in the titanium plasma of vacuum arc discharge

The paper is considersed the process of modifying the surface of the ion samples of steel EP866 compressor and EI961 in titanium plasma vacuum arc discharge (VAD) for the values of bias voltages of 150; 300 and 400 and a current of 300A arc. Shows the dependence of the sample weight change on the parameters of the process and shows the change of the process temperature by the processing time at bias voltages 150; 300 and 400 and a constant value so that a vacuum arc. It was shown during the surface modification process, for given values of the arc current and the bias voltages of the process temperature does not exceed the temperature of tempering compressor steel EP866 and EI961.

Metallographic examinations were carried out and the treated samples are given their microstructure. We studied the elemental composition of samples processed at a current of 300 A and VAD bias voltages of 150; 300 and 400, and the main phase of the surface layer of the treated samples.

Tests of samples modified for resistance to salt corrosion VIAM procedure at a temperature of 600°C and obtained results of visual and gravimetric control. This work was performed as part of the strategic direction 17. «Comprehensive anti-corrosion protection, reinforcing, wear-resistant protective coating». Complex problem 17.3. «Multi-layer heat-resistant and heat-resistant coatings, nanostructured reinforcement erosion and corrosion-resistant, wear-resistant, antifretting coating to protect the hot section components and compressor gas turbine engines and gas turbines» («The strategic directions of development of materials and technologies of their processing for the period till 2030»)

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9.
dx.doi.org/ 10.18577/2307-6046-2017-0-3-9-9
УДК 678.8
Satdinov R.A., Istyagin S.E., Veshkin E.A
Analysis of the temperature-time parameters mode curing PCM with specified characteristics

In addition to the general of requirements for polymeric composite materials such as tensile, compression, flexural modulus of elasticity and so on. There are further defined construction assignment. Known that for bearing structures materials these characteristics are strength and cyclic alternating load and specific mechanical properties, the materials in the interior given special attention fire properties for details entering into direct contact with the aggressive or the environment - chemical resistance, etc. As the design of new materials and in adaptation to already existing material projected new constructs, as well as modifications in material through the various additives require comprehensive analysis of the actual properties.

The application of thermokinetic analysis for prediction solidification mode and fiberglass prepreg based on phenol-formaldehyde binder ВСФ-16М. Revealed three step polymerization reaction of a phenol-formaldehyde binder ВСФ-16М. Based on the analysis of physical and chemical properties of the chosen mode is the optimal curing it at a temperature of 140±5°C. Comparisons are carried with experimental design parameters.

The work in the implementation comprehensive scientific direction 17.2. «The development on the basis of fiberglass fabric with low surface density and fast hardening combustible binder WSF-16M» («The strategic directions of development of materials and technologies of their processing for the period till 2030») 

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10.
dx.doi.org/ 10.18577/2307-6046-2017-0-3-10-10
УДК 620.1:629.4.023.18
Yakovlev N.O., Mekalina I.V., Kharitonov G.M., Khitrova O.I.
Strain and stress evolution in organic glasses with different structures at non-uniform heating

The strain and stress evolution characteristics of the organic glass with linear (SO-120, Tg=120°C) and copolymer rarely cross-linked structures (VОS-2, Tg=148°C) and oriented versions thereof – АО-120 (orientation degree 60 and 79%) and VОS-2АО (orientation degree 50%), accordingly, at a non-uniform heating across the thickness, were investigated. It was shown that the rubber-like elastic strain by heating, thermoelastic and residual temperature stress in organic glazing in a large extent depend on the modulus of elasticity and coefficient of linear expansion of the glass. The oriented glass tightness similar to the tightness of the elementary layers of glazing at non-uniform heating has a significant impact on the development of shrinkage strain in the layers. These deformations cause an increase in tensile stresses during cooling and residual temperature stress.

This work was performed as part of the comprehensive scientific areas 2.2. «Qualification and materials research» («The strategic directions of development of materials and technologies of their processing for the period till 2030») 

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11.
dx.doi.org/ 10.18577/2307-6046-2017-0-3-11-11
УДК 66.017
Kotova E.A., Avtaev V.V., Erasov V.S., Gulina I.V.
About features of research of structure and properties foam polymers

Тhe article describes the various methods of quantitative analysis of microscopic structures using a laser scanning microscope. A method for estimating the relative size of the foam cells, consisting of two phases - the base polymer and the void filled with a gaseous substance, by inscribing circle profile in cellular surface structure with elementary structural element in the form of a three-dimensional polyhedron, is offered. The problems of assessment structures with developed relief, as two-dimensional images from an optical microscope, are shown. Work is executed as part of the comprehensive scientific direction 2. «Fundatally-oriented research, qualification of materials, non-destructive testing» («The strategic directions of development of materials and technologies of their processing for the period till 2030»)

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12.
dx.doi.org/ 10.18577/2307-6046-2017-0-3-12-12
УДК 620.179
Murashov V.V.
Definition of the amount of water in honeycomb structures by the acoustic free vibration method

The scope, ways of implementation of acoustic free vibration method, areas of its application and feature of control multilayer glued structures with honeycomb core are covered. Possibility of definition of amount of water in honeycomb structures is shown.

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