Archive - Электронный научный журнал "ТРУДЫ ВИАМ"

Articles

 


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





1.
dx.doi.org/ 10.18577/2307-6046-2018-0-11-3-11
УДК 669.293
Bondarenko Yu.A., Bazyleva O.A., Raevskih A.N., Narskiy A.R.
Research on the creation of a new high-temperature heat-resistant matrix based on intermetallic compounds NiAl–Ni3Al

In this work the possibility of creating a new high-temperature heat-resistant matrix based on intermetallic compounds NiAl and Ni3Al. It is found that the alloys based on the new matrix have good heat resistance and low density. Under the conditions of high-gradient directional crystallization in the samples it was possible to form a directed dendritic structure, oriented along the axis of the samples, consisting of intermetallic NiAl and Ni3Al. In assessing the strength of them managed to get a fairly high strength and ductility.

Read in Russian

2.
dx.doi.org/ 10.18577/2307-6046-2018-0-11-12-19
УДК 621.762:669.24
Volkov A.M., Shestakova A.A., Bakradze M.M.
The comparison of powder produced by gas atomization and by plasma rotate electrode process in the point of production disk billets from Ni-base superalloys

Various characteristics of powders used for jet-engine disk production from Ni-base superalloys are described. The differences in technological properties (granulometric composition, flowability, tap density) and in structure (carbide phases, porosity) are reviewed. The features which affect significantly on the production process of jet-engine disk billets are cited. The approaches to using each type of powder for the certain technological route are grounded.

Read in Russian

3.
dx.doi.org/ 10.18577/2307-6046-2018-0-11-20-27
УДК 669.245
Alekseev A.V., Rastegayeva G.Yu., Pahomkina T.N.
Determination of sulfur and carbon in the powder of nickel alloys

The sulfur and carbon content in the powders of nickel alloys EP648, VPr50 and VZH159 was determined by combustion in an induction furnace gas analyzer CS-444 company Leco, followed by detection in the infrared cell of the spectrometer. Various catalysts – tungsten with tin, vanadium oxide, copper chips were used for the complete extraction of the elements to be determined and the most suitable of them was chosen. The correct determination of sulfur and carbon is confirmed by the analysis of a standard sample of the nickel alloy composition.

Read in Russian

4.
dx.doi.org/ 10.18577/2307-6046-2018-0-11-28-34
УДК 620.1:66.017
Mekalina I.V., Aizatulina M.K., Sentiourin E.G., Popov A.A.
Features of influence of atmospheric factors on aviation organic glass

The paper studies the influence of atmospheric factors on the properties of polymethylmethacrylate and copolymer organic glasses after aging in different climatic zones. The assessment of physical and mechanical, optical characteristics, «silver resistance», softening temperature of organic glasses after aging in the conditions of FCC, Arizona (USA), Florida (USA). The basic features of the climatic ageing of organic glasses of the partially cross-linked structure: polimetilmetakrilata SO-120S and copolymer VOS-1 and VOS-2 – in the oriented and unoriented states. A comparative analysis of the data obtained with commercially used рlexiglas SO-120A, AO-120 and E-2.

Read in Russian

5.
dx.doi.org/ 10.18577/2307-6046-2018-0-11-35-44
УДК 678.8:620.1
Guseva M.A.
The use of the rheological tests in the development of polymeric materials for various purposes

Rheological tests allow to determine the behavior of the material under the unfluence of external loads, to evaluate its technological and operational characteristics and parameters. Рresents examples of the application of the rheological method for predicting the behavior of various polymer systems at the initial stage of development. Reviewed the results of tests of samples of a film silicone binder, the initial components for the paint coating based on polytetrafluorethylene, as well as model composition for investment casting.

Read in Russian

6.
dx.doi.org/ 10.18577/2307-6046-2018-0-11-45-53
УДК 678.84
Prokofiev V.A., Sorokin O.Ju., Vaganova M.L., Lebedeva Yu.E.
High-temperature functionally graded material fabricated via reactive alloy infiltration

Microstructure and properties of HfB2–SiC–B4C–Si ceramics obtained via reactive melt infiltration of SiC–B4C–С porous preform using Si–Hf (8,5% ат.) alloy were studied. It was shown that the ceramics can be defined as a functionally graded material (FGM) in which SiC content increases, whereas HfB2 content decreases from the outer surface to the center. Therefore, HfB2–SiC–B4C ceramics has a rather low density and exhibits high oxidation resistance.

Read in Russian

7.
dx.doi.org/ 10.18577/2307-6046-2018-0-11-54-63
УДК 621.762.222
Efimochkin I.Yu., Kuzmina N.A., Grachshencov D.V., Svetlov I.L., Bobrovkiy A.P.
Niobium silicide synthesis by spark plasma sintering of composite powders

The possibility of niobium silicide synthesis by the spark plasma technique from a binary mixture of mechanical alloyed elemental powders is considered. The X-ray phase analysis of the synthesized samples of niobium silicide was carried out, their microstructure were investigated by the methods of scanning electron microscopy, and X-ray microscopic analysis were used to evaluate the elemental composition. The performed X-ray phase analysis of the synthesized samples demonstrated the preparation of stable tetragonal α-Nb5Si3 and hexagonal γ-Nb5Si3, stabilized by intercalation of carbon atoms. The stability of obtained samples of niobium silicide under 1500°Cfor 10 h was investigated.

Read in Russian

8.
dx.doi.org/ 10.18577/2307-6046-2018-0-11-64-73
УДК 669.018.44
Movenko D.A., Medvedev P.N., Smirnov A.A.
Study of changes in the heat-resistant alloy coating structure after heat resistance tests

The material of the heat-resistant alloy with a heat-resistant coating (Ni–Cr–Al–Ta–Re–Y–Hf)+(Al–Ni–Y)+(Zr–Gd–Y–O) was investigated. It is shown that as a result of vacuum annealing at 1050°C/3 h, interaction zones between components of the coating and the substrate alloy form in the structure of the material due to their mutual diffusion. After heat-resistant tests of 1200°C/100 h, the coating loses its layered structure, the morphology of the structural components changes, the composition of the main elements of the coating is aligned with its depth, which indicates the complete flow of diffusion processes.

Read in Russian

9.
dx.doi.org/ 10.18577/2307-6046-2018-0-11-74-85
УДК 620.197:620.193.2
Kuznetsova V.A., Shapovalov G.G.
Tendencies of development of the erosion-resistant coatings (review)

In this work the main tendencies of development in the field of creation of erosion resistant paint, polymer and complex coatings for protection of metal wares and composite materials are considered. The main principles by which it is necessary to be guided at creation of erosion resistant coatings are revealed. The main requirements causing choice of basic components of protecting cover are considered. Groups of technologies and structures of coverings in compliance with the carried-out analysis are revealed. Leaders in the field of development of erosion resistant coatings are also defined.

Read in Russian

10.
dx.doi.org/ 10.18577/2307-6046-2018-0-11-86-92
УДК 620.1
Kosarina E.I., Generalov A.S., Demidov A.A.
Questions of X-ray non-destructive testing in Russian state standardization system

Requirements for modes, parameters and test equipment for state and international systems of standards are given. The difference in the structure of state and international documents is shown. The analysis of the radiation contrast in the formation of the radiation image and the optical contrast in the conversion of the radiation image into optical, obtained according to the requirements of GOST and ISO. The obtained values were compared with each other. The results of the comparison showed that in compliance with the requirements of Russian standards, a radiation image with a higher radiation contrast is formed, while the optical contrast of the x-ray image is slightly lower than the optical contrast of the image according to the requirements in the ISO system. The quality of the x-ray images obtained according to different normative documents is approximately the same at the final stage.

Read in Russian

11.
dx.doi.org/ 10.18577/2307-6046-2018-0-11-93-100
УДК 620.193.4:620.193.5
Medvedev I.M., Nikitin Ya.Yu., Puzanov A.I., Laptev A.B.
Hot corrosion testing methods for high-temperature alloys (review)

Hot corrosion testing of superalloys can be conducted using burner rig, deposit recoat method or electrochemical testing. Periodical deposition of salts, followed by heating in furnace is the most common way to evaluate resistance of superalloy to hot corrosion. 75% Na2SO4+25% NaCl is the most common corrosive solution for this type of testing. Test temperatures range from 650 to 950°C. The main criteria for assessment of alloys resistance to hot corrosion is gravimetry, which is used to measure weight loss and corrosion depth. Many researchers have also investigated the influence of hot corrosion on mechanical properties of high temperature alloys.

Read in Russian

12.
dx.doi.org/ 10.18577/2307-6046-2018-0-11-101-110
УДК 620.179:678.747.2
Istyagin S.E., Postnov V.I.
About increase accuracy of correlation dependence parameters nondestructive control at diagnostics of properties coal plastics

Coal plastics reinforced with woven fillers are widely distributed in medium- and strongly loaded details of designs of aircraft. The polymeric composition constructional materials made from coal fillers and used in aircraft construction are appreciated their specific strength characteristics. Measurement and which analysis is possible with applying of the nondestructive control (NC). Contains of additional researches showing importance of application of methods of increase in accuracy of the correlation equations based by NC.

Read in Russian