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dx.doi.org/ 10.18577/2307-6046-2024-0-11-3-13

УДК 669.017.13

Sevalnev G.S., Vlasov I.I., Klimov V.S., Nefedkin D.Yu.

EVALUATION OF RESISTANCE TO CONTACT-DEFORMATION IMPACT DURING INTENSIVE WEAR OF THE SURFACE OF CAST ENTROPY ALLOYS BASED ON THE Ni–Co–Cr SYSTEM

The tribological characteristics of entropy alloys based on the Ni–Co–Cr alloying system under contact-deformation impact under dry sliding friction conditions were studied. The results of the studies showed that the hardness of the equimass alloy is 10 % greater than equiatomic alloy, and the use of additional alloying increases the hardness of the equiatomic alloy by 20–45 %. The wear resistance of the alloys depends slightly on the hardness and, to a greater extent, on hardening due to the accumulation of subsurface defects.

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Reference list

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2. Kaplanskii Yu.Yu., Mazalov P.B. World trends in the development of refractory high-entropy alloys for heat-loaded units of aerospace technics (review). Aviation materials and technologies, 2022, no. 2 (67), paper no. 03. Available at: http://www.journal.viam.ru (accessed: July 25, 2024). DOI: 10.18577/2713-0193-2022-0-2-30-42.
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18. Miracle D.B., Senkov O.N. A critical review of high entropy alloys and related concepts. Acta Materialia, 2017, vol. 122, pр. 448–511. DOI: 10.1016/j.actamat.2016.08.081.
19. George E.P., Raabe D., Ritchie R.O. High-entropy alloys. Nature Reviews Materials, 2019, vol. 4, pр. 515–534. DOI: 10.1038/s41578-019-0121-4.
20. Zhang Y., Zhou Y.J., Lin J.P. et al. Solid-solution phase formation rules for multi-component alloys. Advanced Engineering Materials, 2018, vol. 10 (6), pр. 534–538. DOI: 10.1002/adem.200700240.
21. Moghaddam P.V., Hardell J., Vuorinen E., Prakash B. The role of retained austenite in dry rolling/sliding wear of nanostructured carbide-free bainitic steels. Wear, 2019, vol. 428, pр. 193–204.
22. Harzallah R., Mouftiez A., Felder E. et al. Rolling contact fatigue of Hadfield steel X120Mn12. Wear, 2010, vol. 269. No. 9-10, pр. 647–654.
23. Sevalnev G.S., Sevalneva T.G., Kolmakov A.G., Dulnev K.V., Krylov S.A. Study of the tribo-technical characteristics of corrosion-resistant steels with different mechanisms of volumetric hardening. Trudy VIAM, 2021, no. 10 (104), paper no. 01. Available at: http://www.viam-works.ru (accessed: July 25, 2024). DOI: 10.18577/2307-6046-2021-0-10-3-11.

dx.doi.org/ 10.18577/2307-6046-2024-0-11-14-21

УДК 669.017

Morozova L.V.

DETERMINATION OF THE CAUSES OF THE FORMATION OF SURFACE CRACKS IN STAMPED PARTS MADE OF LOW-CARBON STEELS

A comprehensive study of parts made of low-carbon steel grades DC04 and DX54D was carried out in order to establish the causes of the formation of surface cracks using optical and electron microscopy, chemical analysis and metallography, the structure was assessed, the chemical composition, the structure of surface cracks and artificially obtained fractures of parts were studied. An X-ray spectral microanalysis of the surface of the opened cracks was carried out. A decrease in ductility due to contamination of the parts material with non-metallic inclusions has been established.

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Reference list

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dx.doi.org/ 10.18577/2307-6046-2024-0-11-22-32

УДК 539.61

Akbulatov R.R., Efremova A.P., Bogachev I.A., Panin P.V.

STUDY OF ISOTHERMAL PHASE TRANSFORMATIONS KINETICS IN HEAT-RESISTANT ALLOYS BASED ON GAMMA TITANIUM ALUMINIDE TiAl

An experimental investigation of structure evolution kinetics in heat-resistant intermetallic TiAl-based alloys of various classes has been accomplished under the conditions of high-temperature exposures in the temperature range 900–1300 °C and durations of 15–240 min. The Temperature–Time–Transformation diagrams (TTT-diagrams) have been constructed to summarize data on isothermal phase transformations in the studied alloys with initial structures after selective electron beam melting.

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Reference list

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22. Vasilev A.I., Putyrskiy S.V., Korotchenko A.Yu., Anisimova A.Yu. MIM technology as a method of manufacturing precision parts from metal-powder compositions, including titanium alloys (review). Trudy VIAM, 2021, no. 3 (97), paper no. 02. Available at: http://www.viam-works.ru (accessed: August 09, 2024). DOI: 10.18577/2307-6046-2021-0-3-16-27.
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26. Panin P.V., Lukina E.A., Bogachev I.A., Medvedev P.N., Naprienko S.A. Additive synthesis of TiAl alloy of the Ti–Al–V–Nb–Cr–Gd system by selective electron beam melting. Metallurg, 2023, no. 3, pp. 55–65. DOI: 10.52351/00260827_2023_03_55.
27. Panin P.V., Lukina E.A., Bogachev I.A., Naprienko S.A. Influence of technological parameters of selective electron beam melting on the chemical composition, microstructure and porosity of TiAl alloy of the Ti–Al–V–Nb–Cr–Gd system. Metallurg, 2023, no. 5, pp.54–66.
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dx.doi.org/ 10.18577/2307-6046-2024-0-11-33-43

УДК 678.8

Kapustianskaia M.A., Lyubimova A.S., Kovalenko A.V., Sidelnikov N.K., Tkachuk A.I., Slavin A.V.

DEVELOPMENT OF A COLD-CURING POLYMER SYNTATIC FILLER WITH ENHANCED PHYSICO-MECHANICAL PROPERTIES

This paper presents the results of a study on the development of a cold-curing polymer syntactic filler composition for local strengthening of honeycomb panels, sealing end sections and filling technological voids of aircraft elements. About 100 compositions were studied, differing in components and their ratio in the system. The best composition based on test results was assigned the VPZ-25 brand. In terms of a number of properties, the developed material is at the same level or exceeds the characteristics of its foreign and domestic analogues.

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Reference list

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8. Pavlyuk B.Ph. The main directions in the field of development of polymeric functional materials. Aviacionnye materialy i tehnologii, 2017, no. S, pp. 388–392. DOI: 10.18577/2071-9140-2017-0-S-388-392.
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dx.doi.org/ 10.18577/2307-6046-2024-0-11-44-70

УДК 666.762.852

Erin K.D., Sorokin O.Ju., Monin S.A., Gorbovets M.A.

METHODS FOR MEASURING AND IMPROVING THE CRACK RESISTANCE OF SILICON CARBIDE COMPOSITE MATERIALS

This literature review discusses methods for determining the fracture toughness of ceramic composite materials. The main methods for increasing crack growth resistance are given. Methods for determining mechanical properties using Vickers pyramid indentation, the three- and four-point bending method, and computer modeling of the crack growth process, including at elevated temperatures, are considered. The main disadvantages of each way of determining mechanical properties are presented.

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Reference list

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dx.doi.org/ 10.18577/2307-6046-2024-0-11-71-88

УДК 678.747.2

Valueva M.I., Zelenina I.V., Nacharkina A.V., Sidorina A.I., Slavin A.V.

HIGH-TEMPERATURE CARBON FIBER REINFORCED PLASTICS BASED ON POLYIMIDE BINDERS

The article presents an up-to-date review of scientific and technical information in the field of development and research of high-temperature carbon fiber reinforced plastics based on thermosetting polyimide binders and their manufacturing technology. The article considers the world market of polyimide binders and carbon fiber reinforced plastics based on them, the features of the production of carbon fiber reinforced plastics based on polyimide binders, their properties and application, studies publication activity, global development trends and the main areas of research in this area.

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Reference list

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27. Kablov E.N., Laptev A.B., Prokopenko A.N., Gulyaev A.I. Relaxation of polymeric composite materials under the prolonged action of static load and climate (review). Part 1. Binders. Aviation materials and technologies, 2021, no. 4 (65), paper no. 08. Available at: http://www.journal.viam.ru (accessed: August 31, 2023). DOI: 10.18577/2713-0193-2021-0-4-70-80.
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36. Method for impregnating layered blanks based on woven fillers and epoxy, organosilicon and polyimide binders and a device for implementing this method: pat. 2743422C1 Rus. Federation; appl. 27.03.20; publ. 18.02.21.
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38. Autoclave cure cycle design process and curing method: pat. WO2010087918A1; appl. 21.12.09; publ. 05.08.10.
39. Improved processing of polymer matrix composites: pat. EP 2337672B1; appl. 22.10.08; publ. 28.02.18.
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43. Polyimide resin composition and method for producing the same: pat. JP2016216720A; appl. 22.12.16; publ. 18.11.20.
44. Antioxidant polyimide prepreg and preparation method thereof: pat. CN 111154260В; appl. 19.01.20; publ. 23.09.22.
45. Yang S.Y. Advance polyimide materials: synthesis, characterization, and applications. Elsevier, 2018, 498 p.
46. Fiber-reinforced laminated body and method for manufacturing same: pat. ЕР 3718765А1; appl. 28.11.17; publ. 06.06.19.
47. Liu Y., Li J., Chen X. Interlaminar properties of carbon nanotubes modified carbon fiber fabric reinforced polyimide composites. Journal of Composite Materials, 2023, vol. 57, no. 7, pp. 1277–1288.
48. Method for preparing carbon fiber-polyimide composite material: pat. CN 104629365A; appl. 17.02.15; publ. 01.02.17.
49. Composite material with a polyimide resin matrix, reinforced with carbon fiber, with super-strong characteristics of interfacial interaction at a high temperature of 300 °C and a method for producing it: pat. CN 116694075A; appl. 29.06.23; publ. 05.09.23.
50. Method for producing a polyimide composite material reinforced with modified carbon fiber: pat. CN 116278224A; appl. 24.03.23; publ. 23.06.23.

dx.doi.org/ 10.18577/2307-6046-2024-0-11-89-99

УДК 620.179

Shitikov V.S., Pichugin S.S.

ESTIMATION OF ELECTRICAL PROPERTIES DISTRIBUTION UNDER ELASTIC DEFORMATION OF THE CONTROL OBJECT BY EDDY CURRENT METHOD

The article deals with the possibility of estimating the distribution of electrical properties along the depth of the object using eddy current method of nondestructive testing. Experimental testing of stress-strain state estimation of titanium alloy plate at bending by means of transducer signal acquisition in a wide range of frequencies is carried out. The experimental data was analyzed using analytical calculation of the transducer signal. As a result of the studies, the relationship between mechanical stresses and electrical conductivity was established, and the possibility of effective control of the stress level by eddy current method was shown.

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Reference list

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dx.doi.org/ 10.18577/2307-6046-2024-0-11-100-112

УДК 539.61

Sutubalov A.I., Podzhivotov N.Y., Shershak P.V., Yakovlev N.O.

ASSESSMENT OF THE ADHESIVE STRENGTH OF THE FIBER–POLYMER MATRIX SYSTEM USING THE NONPARAMETRIC BOOTSTRAP METHOD

The article discusses the practical aspects of using the bootstrap method in micromechanics problems to assess the adhesive strength of the fiber–polymer matrix system. The article provides a detailed algorithm for constructing confidence intervals when calculating the bootstrap method. А comparative analysis of the interval estimation of experimental adhesive strength data using the nonparametric (bootstrap) method and a number of parametric methods was carried out. Based on the generated bootstrap samples, a histogram of the frequency distributions of the average values of the adhesive strength of the fiber–polymer matrix system is constructed.

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dx.doi.org/ 10.18577/2307-6046-2024-0-11-113-124

УДК 620.1:678.8

Startsev O.V., Koval T.V., Krotov A.S., Dvirnaya E.V., Veligodsky I.M.

INVESTIGATION OF THE PROPERTIES OF CARBON FIBER REINFORCED PLASTIC WITH COATINGS AFTER 8 AND 13 YEARS OF AGING IN MODERATELY WARM CLIMATE Part 2. Condition of protective paint and vanish coatings

The results of the study of color characteristics, surface profile and glass transition temperature of fluorepoxy (VE-46) and acrylstirol (AS-1115) coatings on the front and back surfaces of KMKU-2m.120 carbon fiber plastic exposed for 8 and 13 years in open conditions of a moderately warm climate were presented. Methods of colorimetry, profilometry and dynamic mechanical analysis were used to obtain information about the properties of coatings. Red enamel VE-46 and yellow enamel AS-1115 tuned out to be the most vulnerable to photochemical activity processes.

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10.

CONTENТS

Heat-resistant alloys and steels

Sevalnev G.S., Vlasov I.I., Klimov V.S., Nefedkin D.Yu. Evaluation of resistance to contact-deformation impact during intensive wear of the surface of cast entropy alloys based on the Ni–Co–Cr system

Morozova L.V. Determination of the causes of the formation of surface cracks in stamped parts made of low-carbon steels

Light-metal alloys

Akbulatov R.R., Efremova A.P., Bogachev I.A., Panin P.V.Study of isothermal phase transformations kinetics in heat-resistant alloys based on gamma titanium aluminide TiAl

Composite materials

Kapustianskaia M.A., Lyubimova A.S., Kovalenko A.V., Sidelnikov N.K., Tkachuk A.I., Slavin A.V. Development of a cold-curing polymer syntatic filler with enhanced physico-mechanical properties

Erin K.D., Sorokin O.Yu., Monin S.A., Gorbovets M.A. Methods for measuring and improving the crack resistance of silicon carbide composite materials

Valueva M.I., Zelenina I.V., Nacharkina A.V., Sidorina A.I., Slavin A.V. High-temperature carbon fiber reinforced plastics based on polyimide binders

Material tests

Shitikov V.S., Pichugin S.S. Estimation of electrical properties distribution under elastic deformation of the control object by eddy current method

Sutubalov A.I., Podzhivotov N.Yu., Shershak P.V., Yakovlev N.O. Assessment of the adhesive strength of the fiber–polymer matrix system using the nonparametric bootstrap method

Startsev O.V., Koval T.V., Krotov A.S., Dvirnaya E.V., Veligodsky I.M. Investigation of the properties of carbon fiber reinforced plastic with coatings after 8 and 13 years of aging in moderately warm climate. Part 2. Condition of protective paint and vanish coatings

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