Articles

 


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1.
dx.doi.org/ 10.18577/2307-6046-2014-0-11-1-1
УДК 669.245:669.018.44
Moiseeva N.S., Nazarkin R.M.
INTERPHASE STRESSES IN СAST SINGLE-CRYSTAL NI-BASED SUPERALLOYS

In this article the substructure of cast Ni-based superalloys and application of stress condition model of structural components are described. The inapplicability of standard technique of x-ray tensometry «sin2ψ method» was shown for single-crystal and direc-tionally solidified samples of superalloys. A structural model of superalloy and the technique of calculation of interphase tension in single-crystal Ni-based superalloys are offered. This structural model is working with х-ray diffraction analysis and experimental data on the crystal lattice misfit (i.e. mismatch of γ- and γ'-phases crystal lattice con-stants).

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2.
dx.doi.org/ 10.18577/2307-6046-2014-0-11-2-2
УДК 669.018.95
Nochovnaya N.A., Panin P.V., Alexeev E.B., Bokov K.A.
LOW-COST ALLOYED TITANIUM ALLOYS FOR METAL-POLYMER LAMINATES

Two pilot low-cost alloyed near-α-(Ti–Fe–Zr–O–N) and α+β (Ti–Al–V–Fe)-alloys have been developed specially for titanium-polymer laminates, which allow a 20 percent weight reduction in comparison to that of bulk aluminum-based alloys constructions. The new alloys are doped with REM and possess increased mechanical and service properties.

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3.
dx.doi.org/ 10.18577/2307-6046-2014-0-11-3-3
УДК 621.791.04
Duyunova V.A., Mukhina I.Y., Uridiya Z.P.
NEW COMPOSITIONS AND TECHNOLOGY OF ANTIBURNING-ON ADDITIVE MATERIALS PRODUCTION

The most important problems at casting of magnesium alloys were considered: сrea-tion of new compositions and technology of antiburning-on additive materials (AAM) production with improved properties and study of the mechanism of protection of mag-nesium alloys from oxidation in the process of casting into sand-clay mixtures (SCM)

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4.
dx.doi.org/ 10.18577/2307-6046-2014-0-11-4-4
УДК 678.84
Davydova I.F., Kavun N.S.
HEAT-RESISTANT ANTI-FRICTION TEXTOLITES

Properties of fiberglass laminates on a base of polyimide binder and various fillers were studied. It was shown, that a combined material with carbon fabric in external layers has high mechanical strength, heat resistance, anti-friction properties and high durability

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5.
dx.doi.org/ 10.18577/2307-6046-2014-0-11-5-5
УДК 678.84
Romanov A.M., Beljaev А.А., Shirokov V.V.
PECULIAR FEATURES OF OPTIMIZATION OF RESONANT RADAR-ABSORBING MATERIALS OF NONMAGNETIC TYPE

This article is devoted to numerical optimization of resonant narrow-band radar-absorbing materials based on polymer matrices of different density on a base of car-bonized fiber «UVZH-15C Echo» (Svetlogorsk PC«Khimvolokno», Belarus) with a di-ameter of filament 7 micron and specific resistivity 0,00003 Ohm•m. As a result of cal-culations, for a number of frequencies of centimeter and decimeter waves optimal mate-rial thickness, length and concentration of the fiber – filler were found. Features of res-onant materials optimization related to an ambiguity of definition of optimized parame-ters are taken into account. Because of that, the calculations allow you to select a type of matrix in terms of the minimum mass of 1 m2 of the material.

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6.
dx.doi.org/ 10.18577/2307-6046-2014-0-11-6-6
УДК 678.8
Gusev Y.A., Grigoriev M.M., Timoshina L.N.
PRODUCTION OF STANDARD POLYMER COMPOSITE SAMPLES WITH THE SET POROSITY BY VACUUM INFUSION

In this study the manufacturing technologies of standard CFRP samples with the set porosity by vacuum infusion using a semipermeable membrane, on a basis of epoxy resin depending on impregnation parameters have been considered. Measurement of porosity was carried out visually on sections. Samples of plates were investigated by echo-pulse ultrasonic control method , using phased arrays for detection of dependence between a ground signal and porosity in standard samples.

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7.
dx.doi.org/ 10.18577/2307-6046-2014-0-11-7-7
УДК 621.792
Smirnov D.N., Zaytseva E.I., Еliseev O.A.
OIL-GASOLINE-PROOF SEALANT WITH SPECIAL PROPERTIES ON THE BASE OF POLYSULPHIDE OLIGOMER

Influence of different fillers and modifying additives on physical-mechanical, pro-cessing and adhesive properties was investigated. It was shown that an introduction of modifying additives of different chemical nature leads to changing of properties, in par-ticular swelling in water of oil-gazoline-proof sealant on a base of polysulphide oligomer.

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8.
dx.doi.org/ 10.18577/2307-6046-2014-0-11-8-8
УДК 629.7.023.222
Kuznetsova V.A., Kuznecov G.V.
DEVELOPMENT TRENDS IN THE FIELD OF FUEL RESISTANT PAINTWORK COATINGS FOR PROTECTION OF INTEGRAL FUEL TANKS OF AIRCRAFTS (REVIEW)

Development trends in the field of fuel resistant coatings which carry out a function of corrosion protection of inner surface of integral fuel tanks made from aluminum alloys, and also polymeric composite materials were considered. Analysis of scientific and technical documentation and security documents of world leading countries on the problem of development of fuel resistant coatings was carried out.

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9.
dx.doi.org/ 10.18577/2307-6046-2014-0-11-9-9
УДК 543.51; 669.1
Alekseev A.V., Yakimovitch P.V.
DETERMINATION OF ARSENIC AND SELENIUM IN HIGH-TEMPERATURE NICKEL ALLOYS BY ICP-MS METHOD WITH HYDRIDE GENERATION OF VAPOR

Now in the modern aviation industry and engine-manufacturing high - temperature nickel alloys, subjecting to huge thermal and power loadings are widely used. Arsenic and selenium presence in nickel alloys leads to catastrophic deterioration of their phys-ical and mechanical properties. In this paper a determination of arsenic and selenium in standard samples of nickel alloys was carried out by mass spectrometry with inductively coupled plasma (ICP-MS), combined with a hydride vapor generation. A technique of dissolution of the probe and its preparation for analysis is given. Spectral interferences were eliminated by separation of the elements determined, using hydrides formation. The detection limit was 0,00001% Se by mass, 0,000005% As by mass, range of determined concentrations: of 0,00006–0,0012% by mass, relative standard deviation of less than 0,05.

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10.
dx.doi.org/ 10.18577/2307-6046-2014-0-11-10-10
УДК 669.85
Dvoretskov R.M., Karachevtsev F.N., Y.A. Isachenko, Zagvozdkina T.N.
ICP-AES DETERMINATION OF BASIC AND ALLOYING ELEMENTS IN THERMOSTABLE MAGNETIC MATERIALS OF REM–FE–CO–B SYSTEM
Development of methods for determination of rare earth elements, iron, cobalt, boron and nickel and aluminum impurities in thermostable magnetic materials of REM–Fe–Co–B system. Examined different conditions for dissolving samples of magnetic materials and optimum conditions of microwave decomposition were established, basic analytical lines free from spectral overlap were chosen. Error of definition of base components does not exceed 3% RH.
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11.
dx.doi.org/ 10.18577/2307-6046-2014-0-11-11-11
УДК 669.245
Karachevtsev F.N., Dvoretskov R.M., Zagvozdkina T.N.
MICROWAVE PROBE PREPARATION OF NICKEL ALLOYS FOR DETERMINATION OF ALLOYING ELEMENTS USING ICP-AES METHOD

A large amount of alloying elements such as Al, Ti, Cr, Co, Zr, Nb, Mo, Ru, Ta, W, Re may be in a composition of heat-resistant nickel alloys simultaneously. However, till the last time there were no techniques for simultaneous determination of them (without an application of similar by composition standard samples).To determine the alloying elements in nickel alloys a method of atomic emission spectroscopy with inductively coupled plasma has been proposed (ICP-AES). The technique of microwave sample preparation of nickel alloys was worked out for samples of different composition includ-ing ruthenium containing ones. Compositions of dissolution mixtures and parameters of microwave digestion were chosen. Measurement techniques of mass fraction of Al, Ti, Cr, Co, Nb, Mo, Ru, Ta, W, Re in nickel alloys by atomic emission spectrometry with inductively coupled plasma were de-veloped and verified. Limits of relative measurement error for elements mass content from 0,1 to 20% don't exceed 4

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12.
dx.doi.org/ 10.18577/2307-6046-2014-0-11-12-12
УДК 669.018.44
Terentiev V.F., Belyaev M.S., Bakradze M.M., Gorbovets M.A., Goldberg M.A.
FRACTURE OF NI-BASED VZH175 SUPERALLOY UNDER STRAIN LOW CYCLE FATIGUE TESTS

Investigation of fracture character of specimens of Ni-based VZH175 superalloy tested under low cyclic fatigue (LCF) at the set total deformation of a cycle was carried out. The nature of destruction of specimens was investigated on specimens tested at two temperatures, different strain amplitude and number of cycles. The nature of destruction of specimens was investigated by SEM TESCAN VEGA//SB. At 20°С fractured surface has a character of rough, ductile failure. At 650°С was observing mixed character of fracturing ductile and quasi-brittle.

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