Archive - Электронный научный журнал "ТРУДЫ ВИАМ"

Articles

 


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1.
dx.doi.org/ 10.18577/2307-6046-2023-0-6-3-14
УДК 539.2
Elyutin E.S., Petrushin N.V., Karachevtsev F.N., Chabina E.B.
SOLUBILITY OF RHENIUM AND RUTHENIUM IN THE γʹ-PHASE AND PHYSICOCHEMICAL PROPERTIES OF NICKEL ALLOYS OF THE Ni–Al‒Re‒Ru SYSTEM

Directional solidification with a flat front of a nickel alloy of the Ni‒Al‒Re‒Ru system was performed. As a result, a casting with a variable length content of the elements Al, Re and Ru (gradient casting) was obtained. It is established that during solidification in a gradient casting, nickel alloys with the structures γ + γʹ, γʹ, γʹ + β are successively formed. The solubility’s of Re and Ru in the γʹ and β phases of the γ + γʹ, γʹ, γʹ + β alloys were determined. For the same alloys, the temperatures γʹ-solvus, solidus and liquidus are determined. It was found that in the Ni–Al–Re–Ru nickel system, the γʹ phase is formed by a peritectic reaction L + γ → γ' at 1374 °C and a eutectic reaction L → γʹ + β at 1372 °C.

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2.
dx.doi.org/ 10.18577/2307-6046-2023-0-6-15-24
УДК 621.792.053
Akhmadieva K.R., Petrova A.P., Shosheva A.L., Bokov V.V.
HEAT-RESISTANT POLYIMIDE ADHESIVE OF CONSTRUCTIVE PURPOSES

The main physical and mechanical properties of polyimide adhesive VK-103 are discussed. The film adhesive VK-103 is a mixture of imide-forming components reinforced with non-woven glass veil. The effect of reinforcing filler on the shear strength of adhesive bonds are investigated. The properties of the adhesive VK-103 after exposure to various operational factors and in comparison with existing foreign analogues are given. The adhesive VK-103 is specialized for bonding metals and multilayer structures of PCM with an operating temperature of up to 320 °C.

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3.
dx.doi.org/ 10.18577/2307-6046-2023-0-6-25-37
УДК 678.8
Chaykun A.М., Pravada E.S.
ELASTOMERIC-FABRIC MATERIALS FOR PRODUCTS OF SPECIAL EQUIPMENT (review)

Article is devoted to the analysis of the elastomeric and fabric materials which are widely applied at development and operation of products of special equipment, including in the aviation and space industry. The main technical properties of elastomeric and textile materials are given, applied designs of rubber-and-canvas materials are described. The main technological processes of production of elastomeric and fabric materials are described. The approaches applied at forecasting of their operability.

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4.
dx.doi.org/ 10.18577/2307-6046-2023-0-6-38-45
УДК 666.762.14
Antipov V.V., Varrik N.M., Maximov V.G., Lugovoy A.A., Babashov V.G., Shavnev A.A.
STUDY OF MECHANICAL AND THERMAL CHARACTERISTICS OF A POROUS CERAMIC MATERIAL BASED ON MULLITE

Porous ceramic materials are in demand in many industries using high-temperature furnaces and other equipment operating at elevated temperatures. In this work, a porous ceramic material was obtained from a mullite fiber, and a solid binder containing fine boron powder and crushed quartz fibers was used as a binder. Samples of porous ceramic materials were obtained and their mechanical and thermal characteristics after heat treatment at various temperatures were evaluated.

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5.
dx.doi.org/ 10.18577/2307-6046-2023-0-6-46-62
УДК 678.8
Valueva M.I., Zelenina I.V., Nacharkina A.V., Gulyaev A.I.
RESEARCH OF INFLUENCE OF THERMAL AGING ON PROPERTIES HIGH-TEMPERATURE POLYIMIDE CARBON FIBER REINFORCED PLASTIC

The results of studies of the effect of laboratory-simulated exposure to elevated temperatures (of 250, 280 and 320 °С) on the structure and properties of high-temperature carbon fiber reinforced plastic (CFRP) based on a thermosetting polyimide binder are presented. The mass loss of CFRP under prolonged exposure to elevated temperatures has been determined, and the activation energy of the thermal aging process has been calculated. For comparison, the data of scientific and technical literature on the thermal-oxidative effect of elevated temperatures on CFRP of foreign manufacturers based on polyimide binders of the PMR-type are presented.

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6.
dx.doi.org/ 10.18577/2307-6046-2023-0-6-63-71
УДК 691.666.1-9
Veshkin E.A, Semenychev V.V., Kirilin S.G., Istyagin S.E.
INVESTIGATION OF ACOUSTIC EMISSION SIGNALS AND MICROHARDNESS OF THE MATRIX IN THE SAMPLES FROM UNIDIRECTIVE CARBON FIBER

Samples of 1.5 mm thick carbon fiber-reinforced plastic sheet with different curing modes were loaded according to the scheme of cantilever bending in the elastic region. The acoustic emission sensor was attached to the specimen in the zone of maximum bending moments, and the acoustic signals obtained during sample loading were recorded using an oscilloscope with software. The recorded acoustic emission signals were analyzed and, taking into account the values of microhardness of the matrix obtained at different molding modes, the corresponding dependences were plotted.

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7.
dx.doi.org/ 10.18577/2307-6046-2023-0-6-72-86
УДК 678.8
Khrulkov A.V., Karavaev R.Y., Gorodilova N.A., Donetskiy K.I.
SOME CAUSES OF VOIDS FORMATION IN POLYMER COMPOSITE MATERIALS (review)

In the manufacture of structures from polymer composite materials (PCM), defects in the form of pores are very often formed. The study of the causes of pore formation in composites began about half a century ago and is still relevant. This is due to the difficulty of preventing their formation with modern PCM manufacturing technologies, such as non-autoclave molding and the manufacture of parts of increased complexity, as well as due to the increased viscosity of the modified resins. To eliminate defects in the form of the time arising by production, it is necessary to carry out search of way of right choice of parameters of processing.

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8.
dx.doi.org/ 10.18577/2307-6046-2023-0-6-87-104
УДК 678.8
Grinevich D.V., Donetskiy K.I., Shershak P.V., Yakovlev N.O.
MECHANICAL PROPERTIES OF WOVEN COMPOSITE MATERIALS WITH A 3D-REINFORCED STRUCTURE (review)

Considers woven composite materials with a 3D-reinforced structure. A review of studies on the determination of their mechanical properties is carried out. Articles devoted to the study of the microstructure of materials, their properties in tension, compression, interlayer fracture, impact, and cyclic loading are considered. A comparison of 3D-woven composite materials with woven 2D composite materials is carried out, the influence of the structure on mechanical properties is considered, the main parameters of these materials are given, as well as information on the nature of their destruction. A variant of the non-crimp 3D-woven composite materials is considered separately.

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9.
dx.doi.org/ 10.18577/2307-6046-2023-0-6-105-114
УДК 669.295
Antipov V.V., Gorlov D.S., Chesnokov D.V., Juravleva P.L., Ivanov I.M.
INVESTIGATION OF CORROSION RESISTANCE OF ION-PLASMA COATINGS FOR THE PROTECTION OF INTERMETALLIC TITANIUM ALLOY

Presents the results of comparative tests of corrosion resistance of ion-plasma layered coatings of the (Ti–TiN) + VSDP-13 system obtained after vacuum annealing and after saturation in metal plasma to protect the deformable intermetallic titanium ortho-alloy VIT6. Metallographic studies and studies of the phase composition were carried out after accelerated cyclic corrosion tests at a temperature of 700 °C on the basis of 10 cycles. An increase in the corrosion resistance of the alloy-coating composition was found when vacuum annealing was applied at a temperature of 700 °C for 5 hours relative to saturation in metal plasma.

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10.
dx.doi.org/ 10.18577/2307-6046-2023-0-6-115-129
УДК 669.018, 543.423
Dvoretskov R.M., Alexeev E.B., Karachevtsev F.N., Zagvozdkina T.N.
ANALYSIS OF THE CHEMICAL COMPOSITION OF INTERMETALLIC TITANIUM ORTHO-ALLOYS BY INDUCTIVELY COUPLED PLASMA ATOMIC EMISSION SPECTROMETRY. Part 1

A technique is proposed for determining the base elements Ti, Nb, Al and alloying elements Mo, V, Zr, W, Ta in ortho-titanium alloys by inductively coupled plasma atomic emission spectrometry. Analytical lines of elements free from significant spectral overlaps are chosen. The spectral lines of the internal standard were selected. The limits of detection of elements are estimated. The metrological characteristics of the technique were evaluated using model solutions. The correctness of the developed methodology was assessed using standard samples.

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11.
dx.doi.org/ 10.18577/2307-6046-2023-0-6-130-141
УДК 620.1:629.7.023.222
Antipov V.V., Krivushina A.A., Startsev V.O., Kogan A.M.
STUDY OF THE PAINT COATINGS PROPERTIES AFTER IMPACT OF MICROMYCETES IN A MODERATE AND MODERATE WARM CLIMATE

The properties of paint coatings under the influence of standard test cultures and microscopic fungi isolated under natural conditions of a temperate (Moscow) and moderately warm climate (Gelendzhik) were studied. Changes in the decorative properties of coatings VE-69 and EP-140 after exposure to individual strains of micromycetes were revealed. It is shown that the color change of VE-69 and EP-140 coatings with red pigment is higher than for coatings of similar enamels with gray pigment. The study of adhesive properties did not reveal any changes on all samples, both after standard tests with test cultures according to GOST 9.049–91, and after long-term (45 and 90 days) exposure to monocultures of micromycetes isolated in temperate and moderately warm climates.

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12.
dx.doi.org/ 10.18577/2307-6046-2023-0-6-142-152
УДК 620.192.63
Kosarina E.I., Mikhailova N.A., Suvorov P.V., Demidov A.A.
THE NATURE OF NOISE IN DIGITAL RADIOGRAPHY, THEIR MODELING AND WAYS OF SUPPRESSION IN THE DIGITAL RADIOGRAPHIC IMAGE (review)

Questions of the nature of noise are considered when forming digital radiographic images. Classification of types of noise is carried out and are defined, what of its types it is possible to clean from the digital image. Ways of modeling of noise and assessment of their level, and also suppression are studied; merits and demerits of each of the considered ways are noted. It is shown, what noise arise at stages of forming of radiation images and their transformations to the digital. It is noted that the quantization noise cannot be eliminated with the subsequent filtering as is the integral characteristic of digital detector system.

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13.
CONTENТS

Heat-resistant alloys and steels

 

Elyutin Е.S., Petrushin N.V., Karachevtsev F.N., Chabina E.B. Solubility of rhenium and ruthenium in the γ-phase and physicochemical properties of nickel alloys of the Ni–Al‒Re‒Ru system

 

 

Polymer materials

 

Akhmadieva K.R., Petrova А.P., Shosheva A.L., Bokov V.V. Heat-resistant polyimide adhesive of constructive purposes

 

Chaykun A.M., Sergeyev A.V. Pravada E.S. Elastomeric-fabric materials for products of special equipment (review)

 

 

Composite materials

 

Antipov V.V., Varrik N.M., Maksimov V.G., Lugovoy A.A., Babashov V.G., Shavnev A.A. Study of mechanical and thermal characteristics of a porous ceramic material based on mullite

 

Valueva M.I., Zelenina I.V., Nacharkina A.V., Gulyaev A.I. Research of influence of thermal aging on properties high-temperature polyimide carbon fiber reinforced plastic

 

Veshkin Е.A., Semenychev V.V., Kirillin S.G., Istyagin S.E. Investigation of acoustic emission signals and matrix microhardness of the matrix in samples from unidirectional carbon fiber

Hrulkov A.V., Karavaev R.Yu., Gorodilova N.A., Donetskiy K.I. Some causes of voids formation in polymer composite materials
(review)

 

Grinevich D.V., Donetsky K.I., Shershak P.V., Yakovlev N.O. Mechanical properties of woven composite materials with a 3D-reinforced structure (review)

 

Protective and functional

coatings

 

Antipov V.V., Gorlov D.S., Chesnokov D.V., Zhuravleva P.L., Ivanov I.M. Investigation of corrosion resistance of ion-plasma coatings for the protection of intermetallic titanium alloy

 

 

Material tests

 

Dvoretskov R.M., Alekseev E.B., Karachevtsev F.N., Zagvozdkina T.N. Analysis of the chemical composition of intermetallic titanium ortho-alloys by inductively coupled plasma atomic emission spectrometry. Part 1

 

Antipov V.V., Krivushina A.A., Startsev V.O., Kogan A.M. Study of the paint coatings properties after impact of micromycetes in a moderate and moderate warm climate

 

 

Kosarina E.I., Mikhaylova N.A., Suvorov P.V., Demidov A.A. The nature of noise in digital radiography, their modeling and ways of suppression in the digital radiographic image (review)

 

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