Articles

 


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1.
dx.doi.org/ 10.18577/2307-6046-2018-0-2-1-1
УДК 669.245
Bakradze M.M., Volkov A.M., Shestakova A.A., Letnikov M.N., Bubnov M.V.
THE FEATURES OF THE GRAINS SIZE CHANGING IN THE P/M Ni-BASE SUPERALLOY FOR DISKS APPLICATION PRODUCED VIA DIFFERENT TECHNOLOGIES

The processes of grain growth in the Ni-base superalloy are reviewed. The powder was produced via argon atomization and plasma rotating electrode process. The changing of grain size during solution treatment with various temperatures directly after hot isostatic pressing (HIP) and also after isothermal forging of the compacted material are analyzed. It is shown that grains of the material from argon atomization powder grow slower in comparison with the material from PREP-powder. More intensive grain growth during the increase of solutioning temperature is observed in the case of additional plastic deformation of the compacted material.

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2.
dx.doi.org/ 10.18577/2307-6046-2018-0-2-2-2
УДК 669.018.44:669.245
Sidorov V.V., Petrov D.N., Kosenkov O.M., Gorunov A.V.
TESTING EXPRESS-METHODS FOR DETERMINING THE OXYGEN CONTENT IN THE COMPLEXLY ALLOYED NICKEL MELTS UNDER VACUUM INDUCTION MELTING PROCESS WITH THE USE OF OXYGEN PROBES

The technique provides ultra-low oxygen content in the process of smelting complex alloyed heat-resistant nickel alloys with special oxygen probes. This technique allows rapid and efficiently manage the processes of regulating the concentration of oxygen in the melt. Tested the developed method for installing in the melting of nickel-based superalloys. The technique of determining the oxygen content in the melt at can also be used for other, including newly developed alloys.

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3.
dx.doi.org/ 10.18577/2307-6046-2018-0-2-3-3
УДК 621.791
Stolyankov Yu.V., Lukin V.I., Afanasiev-Khodykin A.N.
THIN-WALLED STRUCTURAL COMPONENT SOLDERING BY AMORPHOUS TAPE SOLDER VPr51

In the article some peculiar structure features and properties of the amorphous tape solder on the basis of the nickel alloy (VPr51) are provided. The solder engineered for the thin-walled structural component brazing made from stainless steels and nickel-based alloys. Some data related to the solder alloy composition, its brazing conditions (i. e. temperature and delay time), technological properties (flowing and wetting), erosive activity to the stainless steels and strength characteristics of soldered joints are brought here in the article as well.

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4.
dx.doi.org/ 10.18577/2307-6046-2018-0-2-4-4
УДК 669.715
Eroshkin S.G., Dynin N.V.
EXPERIENCE IN THE DEVELOPMENT AND PRODUCTION OF REFERENCE MATERIALS OF COMPOSITION OF ALUMINUM ALLOY D1, D16

Methods of spectral analysis are widely used on the production of aluminum alloys to determine the chemical composition of the melted material. For calibration of spectrometres are used certified reference materials (CRMs) of alloy composition. Uncertainty of certified values of CRM significantly affect on the accuracy of quantitative analysis. FSUE «VIAM» develops and produces certified reference materials. The wide use of aluminum alloys in various industries determines the demand for aluminum alloy CRM and the relevance of the work on the development and production of CRM aluminum alloys. In this work we present the results of a study of the material composition of the alloy blanks CRM D1, D16 and attestation results. The characteristic of calibration dependences obtained on spectrometers of two types is given.

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5.
dx.doi.org/ 10.18577/2307-6046-2018-0-2-5-5
УДК 669.017.165: 669.295
Novak A.V., Alexeev E.B., Ivanov V.I., Dzunovich D.А.
THE STUDY OF THE QUENCHING PARAMETERS INFLUENCE ON STRUCTURE AND HARDNESS OF ORTHORHOMBIC TITANIUM ALUMINIDE ALLOY VТI-4

The results of orthorhombic alloy VTI-4 research are given. To clarify the alloy position on the Ti–Al–Nb state diagram, it is suggested to perform a calculation of the β-stabilizing elements contribution relative to the niobium. The microstructure change was studied as a function of quenching temperatures corresponding to different phase regions. The dependence of the material hardness on the structure-phase state was studied. It was found that a decrease in the quenching temperature leads to an increase in the hardness values, which is due to the release of the ordered O-phase and a decrease in the volume fraction of the plastic β-phase.

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6.
dx.doi.org/ 10.18577/2307-6046-2018-0-2-6-6
УДК 678.067.5
Shuldeshov Е.М., Kraev I.D., Petrova A.P.
POLYMERIC SOUND-ABSORBING MATERIAL DESIGN FOR ENVIRONMENTAL NOISE ABATEMENT OF AIRCRAFT ENGINES

In this article questions of noise abatement of civil air vehicles, being actual in the light of toughening of requirements for environmental noise, are considered. The way of improvement of mass and acoustic characteristics of NDC through application of sound-absorbing material design (instead of glass-fiber-reinforced honeycomb) with a porous insert characterized by the preset thickness and located at a certain height is offered. The manufacturing technology of similar materials as well as characteristics of the produced material are shortly described.

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7.
dx.doi.org/ 10.18577/2307-6046-2018-0-2-7-7
УДК 621.74.045
Vlasova K.A., Klyukvina T.D., Leonov A.A., Larionov S.A.
INTERACTION OF MODEL COMPOSITIONS WITH PLASTIC EQUIPMENT MADE USING 3D PRINTING TECHNOLOGY

This article discusses the interaction of the model composition and plastic equipment. An experiment was conducted with the participation of three model compositions, different in composition and properties, using the example of a thin-walled shaped casting of «Kronstejn» component, manufactured by investment casting. Differences in the tendency of model compositions to form shrinkage shells were revealed. A comparative analysis of the experimental results was carried out. Based on the results of the experiment, the optimal model composition for the production of «Kronstein» casting model was selected.

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8.
dx.doi.org/ 10.18577/2307-6046-2018-0-2-8-8
УДК 669.018.95
Stoyakina E.A., Kurbatkina E.I., Simonov V.N., Kosolapov D.V., Gololobov A.V.
MECHANICAL PROPERTIES OF ALUMINIUM-MATRIX COMPOSITE MATERIALS REINFORСED WITH SiC PARTICLES, DEPENDING ON THE MATRIX ALLOY (review)

The paper reviews the mechanical properties of existing low-filled alumo-matrix composite materials with matrices of aluminum alloys 6XXX (6061, 6063, 6092), 2XXX (2024, 2009), 7XXX (7075, 7050) series and different percentages of silicon carbide hardening particles. The dependence of the change in properties is shown with a change in the percentage content of hardening particles in aluminum-matrix composite materials with different matrix alloys. It is shown that aluminum composites with matrix aluminum alloys 7XXX series have maximal mechanical characteristics. The chemical and phase compositions of matrix alloys are considered. Also, details and constructions, which are made of alumo-matrix composite materials, are considered.

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9.
dx.doi.org/ 10.18577/2307-6046-2018-0-2-9-9
УДК 678.067.5
Melnikov D.A., Khaskov M.A., Guseva M.A., Antyufeeva N.V.
TO THE QUESTION OF THE DEVELOPMENT OF PRESSING MODE FOR LAMINATED PCMs BASED ON PREPREG

The main approaches and methods for determining the optimal temperature-time regimes for pressing laminated PCM based on prepregs are presented. The main stages of pressing regimes of layered PCM based on prepregs are considered from the point of view of the three main technological parameters of pressing (temperature, pressure, time). The pressing regimes for fiberglass PCM based on a melt epoxy binder fiberglass prepreg has been selected. It was shown that correction of pressing regimes depends on thickness of the molded workpiece. Investigations of the process of curing the prepreg at different heating rates on DSC have been carried out and the kinetic parameters of the binder curing reaction have been calculated. The simultaneous solutions of heattrausfer and chemical problems are carried out to take into account the thickness of the composite.

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10.
dx.doi.org/ 10.18577/2307-6046-2018-0-2-10-10
УДК 666.7
Kashin D.S., Stekhov P.A.
MODERN THERMAL BARRIER COATINGS OBTAINED BY ELECTRON-BEAM PHYSICAL VAPOR DEPOSITION (review)

Different compositions and technologies for obtaining heat-shielding coatings for gas turbine engine parts (GTE) are considered in the article. The analysis showed that in order to increase the working temperature of the ceramic layer of heat-shielding coating, the best method is to change the chemical composition of the ceramic by introducing an additional amount of rare-earth alloying elements. This provides the possibility of obtaining a certain level of the thermal coefficient of linear expansion, which leads to an increase in the operating time of the cooled GTE part before the destruction of the ceramic layer of the TBC.

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11.
dx.doi.org/ 10.18577/2307-6046-2018-0-2-11-11
УДК 669.14.018.8
Azarovskiy E.N., Muboyadzhyan S.A.
INVESTIGATION OF THE PROCESS OF MODIFICATION OF STEELS EP866 AND EI961 IN TITANIUM PLASMA VDR WITH TESTS ON RESISTANCE TO SALT CORROSION

The process of surface modification in the ion-plasma installation MAP-3 is considered. It is shown that with the chosen parameters of the modification process, the temperature of the samples does not exceed the tempering temperature of the compressor steels EP866 and EI961. Metallographic and microspectral studies of the surface layer of the samples after modification have been carried out. Modified samples were tested for resistance to salt corrosion by the VIAM method at a temperature of 600°C.

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12.
dx.doi.org/ 10.18577/2307-6046-2018-0-2-12-12
УДК 620.171
Erasov V.S., Oreshko E.I., Lutsenko A.N.
FORMATION OF NEW SURFACES IN A FIRM BODY AT STAGES OF ELASTIC AND PLASTIC DEFORMATIONS, THE BEGINNING AND DESTRUCTION DEVELOPMENT

Models of formation of new surfaces in a firm body at stages of elastic and plastic deformations, the beginning and development of fragile destruction, destruction with existence of plastic deformation are presented. The assessment of the power expenses necessary for formation of unit of a new surface, and as influences on these expenses of plastic deformation is carried out. The method of determination of superficial energy of a material for fragile bodies is presented.

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