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dx.doi.org/ 10.18577/2307-6046-2014-0-10-1-1

УДК 669.715

Ivanova A.O., Vakhromov R.O., Grigoriev M.V., Senatorova O.G.

INVESTIGATION OF EFFECT OF SILVER SMALL ADDITIVES ON STRUCTURE AND PROPERTIES OF RESOURCE Al–Cu–Mg ALLOYS

Thermodynamic calculation of phase structure of resource Al–Cu–Mg system alloys with and without Ag additive was carried out. The effect of small additive of silver on structure and properties of 1,5–2,0 mm thickness sheets of Al–Cu–Mg alloys in naturally aged condition was investigated. It is shown that silver in amount up to 0,6 wt. % leads to increasing of strength characteristics (up to 10%,) fatigue durability (more, than by 15%), crack resistance (up to 10%) and resistance to corrosion cracking with preservation of relative elongation level. Addition of silver in Al–Cu–Mg system alloys is a perspective way of increasing a service life and reliability of articles of aeronautical engineering.

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Reference list

1. Kablov E.N. Aviakosmicheskoe materialovedenie [Aerospace materials] //Vse materialy: Jenciklopedicheskij spravochnik. 2008. №3. S. 2–14.
2. Kablov E.N. Strategicheskie napravlenija razvitija materialov i tehnologij ih pererabotki na period do 2030 goda [Strategic directions of development of materials and technologies to process them for the period up to 2030] //Aviacionnye materialy i tehnologii. 2012. №S. S. 7–17.
3. Antipov V.V., Senatorova O.G., Tkachenko E.A., Vahromov R.O. Aljuminievye deformiruemye splavy [Aluminum wrought alloys] //Aviacionnye materialy i tehnologii. 2012. №S. S. 167–182.
4. Kaigorodova L.I., Sel'nikhina E.I., Tkachenko E.A., Senatorova O.G. Effect of small additions of Sc and Zr on the structure and mechanical properties of an Al–Zn–Mg–Cu alloy //The Physics of Metals and Metallography. 1996. V. 81. №5. P. 513–519.
5. Novikov I.I., Zolotorevskij V.S., Portnoj V.K. i dr. Metallovedenie [Metallography].
T. 2. M.: MISiS. 2009. S. 262–312.
6. Cvetnye metally i splavy. Kompozicionnye metallicheskie materialy [Non-ferrous metals and alloys. Composite Metallic Materials]: Jenciklopedija /Pod red. I.N. Fridljandera, E.N. Kablova. M.: Mashinostroenie. 2001. S. 57–91.
7. Rohlin L.L., Bochvar N.R., Dobatkina T.V. Sovmestnoe vlijanie nekotoryh perehodnyh metallov na izmenenie fazovogo sostava i rekristallizaciju aljuminija [The joint effect of some transition metals on the change in the phase composition and recrystallization of aluminum] //Tehnologija legkih splavov. 2009. №2. S. 20–27.
8. Kablov E.N., Ospennikova O.G., Vershkov A.V. Redkie metally i redkozemel'nye jelementy – materialy sovremennyh i budushhih vysokih tehnologij [Rare metals and rare-earth elements – materials for current and future high-tech] //Trudy VIAM. 2013. №2. St. 01 (viam-works.ru).
9. Zaharov V.V., Elagin V.I., Rostova T.D., Filatov Ju.A. Metallovedcheskie principy legirovanija aljuminievyh splavov skandiem [Metalscience principles alloying of aluminum alloys with scandium] //Tehnologija legkih splavov. 2010. №1. S. 67–73.
10. Ryabov D.K., Kolobnev N.I., Samohvalov S.V. Effect of scandium addition on mechanical properties and corrosion resistance of medium strength Al–Zn–Mg(–Cu) alloy //Materials Science Forum. 2014. V. 794–796. P. 241–246.
11. Teleshov V.V., Golovleva A.P. Vlijanie malyh dobavok serebra i parametrov tehnologii izgotovlenija na strukturu i svojstva polufabrikatov iz splavov sistemy
Al–Cu–Mg–Ag–Xi [The influence of small additions of silver and manufacturing technology parameters on the structure and properties of semi-finished products of alloy systems Al–Cu–Mg–Ag–Xi] //Tehnologija legkih splavov. 2006. №1–2. S. 99–119.
12. Chirkov E.F. Temp razuprochnenija pri nagrevah – kriterij ocenki zharoprochnosti konstrukcionnyh splavov sistem Al–Cu–Mg i Al–Cu [Pace of softening when heated - evaluation criterion of heat resistance of structural alloys systems Al–Cu–Mg and
Al–Cu] //Trudy VIAM. 2013. №2. St. 02 (viam-works.ru).
13. Song Bai, Zhiyi Liu, Yanxia Gu, Xuanwei Zhou, Sumin Zeng. Microstructures and fatigue fracture behavior of an Al–Cu–Mg–Ag alloy with a low Cu/Mg ratio //Materials Science and Engineering A. 2011. №530. P. 473–480.
14. Хiao Yan Liu, Qing Lin Pan, Cong Ge Lu, Yun Bin He, Wen Bin Li, Wen Jie Liang. Microstructure and mechanical properties of Al–Cu–Mg–Mn–Zr alloy with trace amounts Ag //Materials Science and Engineering A. 2009. №525. P. 128–132.
15. Antipov V.V., Vakhromov R.O., Phedorenko T.P., Lukina E.A. Structure and Properties of Semiproducts from Al–Cu–Mg–Ag V-1213 Alloy /In: 12-th International Conference on Aluminium Alloy. Yokohama: The Japan Institute of Light Metals. 2010. Р. 2405–2410.
16. Grigor'ev M.V., Antipov V.V., Vahromov R.O., Senatorova O.G., Ovsjannikov B.V. Struktura i svojstva slitkov iz splava sistemy Al–Cu–Mg s mikrodobavkami serebra [Structure and properties of alloy ingots of Al–Cu–Mg with micro silver] //Aviacionnye materialy i tehnologii. 2013. №3. S. 3–6.
17. Rjabov D.K., Kolobnev N.I. Izmenenie mehanicheskih svojstv splava 1913 pri dvuhstupenchatom iskusstvennom starenii [Changes in mechanical properties of alloy 1913 with a two-stage artificial aging] //Aviacionnye materialy i tehnologii. 2013. №4. S. 3–7.
18. Rjabov D.K., Kolobnev N.I., Samohvalov S.V., Mahsidov V.V. Vlijanie predvaritel'nogo estestvennogo starenija na svojstva splava 1913 v iskusstvenno sostarennom sostojanii [Effect of prior natural aging on the properties of the alloy 1913, artificially aged condition] //Aviacionnye materialy i tehnologii. 2013. №2. S. 8–11.
19. Splav na osnove aljuminija i izdelie, vypolnennoe iz nego [Aluminum-based alloy and article made therefrom]: pat. 2278179 Ros. Federacija; opubl. 20.06.2006. Bjul. №17.

dx.doi.org/ 10.18577/2307-6046-2014-0-10-2-2

УДК 543.51:669.1

Yakimovitch P.V., Alekseev A.V., Min P.G.

DETERMINATION OF LOW PHOSPHORUS CONTENT IN HEAT-RESISTING NICKEL ALLOYS BY ICP-MS METHOD

Determination of phosphorus mass content (less than 0,001% wt.) in standard specimens of nickel alloys was carried out by mass-spectrometry method with inductively coupled plasma (ICP-MS). Spectral interferences were eliminated using mathematical correction equation. The technique of sample dissolving and its preparation for analysis was presented. Relative standard deviation doesn’t exceed 0,05 in the concentration range of 0,0006–0,0065% wt. A detection limit in solution is 0,7μg/l, a detection limit in alloys – 0, 0004 % wt.

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Reference list

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dx.doi.org/ 10.18577/2307-6046-2014-0-10-3-3

УДК 678.8

Beider E.Ya., Petrova G.N., Dykun M.I.

DRESSING OF CARBON FIBERS – FILLERS OF THERMOPLASTIC CARBON REINFORCED PLASTICS

This paper represents results of investigation on choosing coupling agents for carbon fibers for production of carbon fiber-reinforced plastics based on thermoplastic heat-resistant matrixes – polyarilsulfones PSF-T1 and PSF-T2. Carbon fiber-reinforced plastics (CFRP) have got a number of advanced properties – low density, high elasticity modulus, strength, heat resistance, high durability, low temperature linear expansion coefficient. The drawback of these materials is a low shear strength because of poor adhesion of binder to carbon fiber surface. Dressing of carbon fibers were made by epoxy resins solutions, polyimides, polyether oligomers, rolivsan, polysulfone etc. Influence of coupling agent nature on mechanical properties of thermoplastic heat-resistant CFRP at room (20°C) and high temperatures (160 and 185°C) is shown. Strength characteristics data are presented.

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Reference list

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6. Gunjaev G.M., Chursova L.V., Komarova O.A., Gunjaeva A.G. Konstrukcionnye ugleplastiki, modificirovannye nanochasticami [Structural carbon composites modified nanoparticles] //Aviacionnye materialy i tehnologii. 2012. №S. S. 277–286.
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14. Doneckij K.I., Hrul'kov A.V., Kogan D.I., Belinis P.G., Luk'janenko Ju.V. Primenenie ob`emno-armirujushhih preform dlja izgotovlenija izdelij iz PKM [Application of space-reinforcing preforms for the manufacture of RMB] //Aviacionnye materialy i tehnologii. 2013. №1. S. 35–39.
15. Dushin M.I., Hrul'kov A.V., Muhametov R.R., Chursova L.V. Osobennosti izgotovlenija izdelij iz PKM metodom propitki pod davleniem [Features manufacture of RMB by pressure impregnation] //Aviacionnye materialy i tehnolo-gii. 2012. №1. S.18–26.

dx.doi.org/ 10.18577/2307-6046-2014-0-10-4-4

УДК 678.8:621.311.001.57

Goncharov V.A., Sorokin K.V., Fedotov M.Y., Raskutin A.E.

MODELING OF TECHNOLOGICAL PROCESS OF PCM ON A BASE OF VSE-21 RESIN AND TENAX-E STYLE 450 FABRIC MANUFACTURE BY INFUSION METHOD

A sequence of operations for modeling of PCM based on VSE-21 resin and Tenax-E Style 450 fabric manufacture by infusion method is described. Phenomenological processes appearing at forming and also critical characteristics which have to be taken into account during the imitation process are given. Abilities of modeling usage for forming parameters identification even on the stage of calculation and algorithm of model realization to get a high convergence during modeling are described.

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Reference list

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2. Kablov E.N. Materialy i himicheskie tehnologii dlja aviacionnoj tehniki [Materials and chemical technologies for aircraft equipment] //Vestnik Rossijskoj akademii nauk. 2012. T. 82. №6. S. 520–530.
3. Kablov E.N., Karimova S.A., Semenova L.V. Korrozionnaja aktivnost' ugleplastikov i zashhita metallicheskih silovyh konstrukcij v kontakte s ugleplastikom [Corrosiveness CFRP and protection of metal bearing structures in contact with the carbon fiber] //Korrozija: materialy, zashhita. 2011. №12. S. 1–7.
4. Kablov E.N. Korrozija ili zhizn' [Corrosion or life] //Nauka i zhizn'. 2012. №11. S. 16–21.
5. Raskutin A.E., Goncharov V.A. Komp'juternoe modelirovanie tehnologicheskogo processa izgotovlenija PKM metodom vakuumnoj infuzii [Computer simulation of the technological process of RMB by vacuum infusion] //Aviacionnye materialy i tehnologii. 2012. №S. S. 286–291.
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9. Dushin M.I., Hrul'kov A.V., Muhametov R.R., Chursova L.V. Osobennosti izgotovlenija izdelij iz PKM metodom propitki pod davleniem [Features the manufacture of RMB by pressure impregnation] //Aviacionnye materialy i tehnologii. 2012. №1. S. 24–33.
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dx.doi.org/ 10.18577/2307-6046-2014-0-10-5-5

УДК 669.018.95

Grishina O.I., Kochetov V.N., Shavnev A.A., Serpova V.M.

ASPECTS OF APPLICATION OF HIGH-STRENGTH AND HIGH-MODULUS FIBER METAL COMPOSITE MATERIALS FOR AERONAUTICAL PURPOSE (REVIEW)

A review of metal composite materials based on aluminum and titanium matrixes, rein-forced with high-strength fibers of refractory compounds for application in constructions of aerotechnics and space transport systems is presented.

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Reference list

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8. Shmotin Ju.N., Starkov R.Ju., Danilov D.V., Ospennikova O.G., Lomberg B.S. Novye materialy dlja perspektivnogo dvigatelja OAO «NPO „Saturn”» [New materials for advanced engine OJC «SPA „Saturn”»] //Aviacionnye materialy i tehnologii. 2012. №2. S. 6–8.
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13. Belov N.A. Jekonomnolegirovannye zharoprochnye aljuminievye splavy: principy optimizacii fazovogo sostava [Ehkonomnolegirovannye heat-resistant aluminum alloys: principles of optimization phase composition] //Aviacionnye materialy i tehnologii. 2011. №2. S. 6–11.
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15. Kablov E.N., Shhetanov B.V., Grashhenkov D.V., Shavnev A.A., Njafkin A.N. Metallomatrichnye kompozicionnye materialy na osnove Al–SiC [Metal matrix composites based on Al–SiC] //Aviacionnye materialy i tehnologii. 2012. №S. S. 373–380.
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dx.doi.org/ 10.18577/2307-6046-2014-0-10-6-6

УДК 620.1

Zimichev A.M., Balinova Yu.A., Varrik N.M.

TO THE QUESTION OF ELASTICITY MODULUS OF FIBERS FROM REFRACTORY OXIDES

Results of tests by acoustic method of continuous fibers on a base of refractory oxides meant for production of flexible sealing thermal insulation are given. X-ray phase structure and elasticity modulus were defined for samples of Al2O3–SiO2 fibers after heat treatment at 700, 900 and 1200°С. Results showed that a full crystallization of ceramic structure at high-temperature burning leads to increasing of elasticity modulus of oxide fi-bers.

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dx.doi.org/ 10.18577/2307-6046-2014-0-10-7-7

УДК 629.7.023

Kirienko O.A., Shurkova E.N., Volnyj O.S., Barbotko S.L.

STUDY OF INFLUENCE OF DIFFERENT PROTECTIVE COATINGS ON CHARACTERISTICS OF FIRE SAFETY OF FUSELAGE THERMAL ACOUSTIC INSULATION

Samples of perspective material of thermal acoustic isolation were manufactured. The sound heat-insulating material contained the following layers:heat - sound - insulating layer on a base of basalt and silica fibers; a layer of non-woven material, based on aramid fibers; protective coating on a base of fiberglass or heat-resistant polymer film (polyimide film PMA, fluoropolymer film F-4MD, material STF-26, material on a base of fiberglass with fluoroplast F-42 impregnation, polyethersulfone film). Investigation on characterization of fire safety (duration of residual independent burning, length of burn-through) of thermal acoustic insulation material of fuselage with different protective coatings according to the requirements of aviation regulations AP-25, p. 25.856(a) Appendix F, Part VI. Tests were performed in a chamber with a heat radiation panel under an influence on the material both a heat radiation flow of variable intensity and a burner flame. Both separate specimens of pro

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Reference list

1. Dzhafarov M.A., Lozovoj N.F., Lucenko V.I., Fedorov V.K. Obespechenie pozharnoj bezopasnosti na ajerodromah grazhdanskoj aviacii [Fire safety on the ground of Civil Aviation]. M.: Transport. 1987. 3 s.
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3. Barbot'ko S.L., Shurkova E.N. O pozharnoj bezopasnosti materialov, ispol'zuemyh dlja izgotovlenija vneshnego kontura samoletov [On the fire safety of the materials used for the manufacture of the outer contour of aircraft] //Pozharovzryvobezopasnost'. 2011. T. 20. №10. S. 19–24.
4. Barbot'ko S.L., Nagaev A.S. K voprosu ob obespechenii pozharnoj bezopasnosti vneshnego kontura samoletov [On the issue of fire safety outer contour aircraft] /V sb. dokl. VIII nauch. konf. po gidroaviacii «Gidroaviasalon–2010». Ch. II. M.: CAGI. 2010. S. 107–110.
5. Barbot'ko S.L., Shurkova E.N., Vol'nyj O.S., Skryljov N.S. Ocenka pozharnoj bezopasnosti polimernyh kompozicionnyh materialov dlja vneshnego kontura aviacionnoj tehniki [Assessment of fire safety of polymeric composite materials for the outer loop of aeronautical engineering] //Aviacionnye materialy i tehnologii. 2013. №1. S. 56–59.
6. Barbot'ko S.L. Pozharobezopasnost' aviacionnyh materialov [Flammability of aircraft materials] //Aviacionnye materialy i tehnologii. 2012. №S. S. 431–439.
7. Barbot'ko S.L., Kirillov V.N., Shurkova E.N. Ocenka pozharnoj bezopasnosti polimernyh kompozicionnyh materialov aviacionnogo naznachenija [Assessment of fire safety of polymeric composite materials for aircraft industry] //Aviacionnye materialy i tehnologii. 2012. №3. S. 56–63.
8. Sytyj Ju.V., Sagomonova V.A., Kisljakova V.I., Bol'shakov V.A. Vibropogloshhajushhie materialy na osnove termojelastoplastov [Vibration-absorbing materials based on thermoplastic elastomers] //Trudy VIAM. 2013. №3. St. 06 (viam-works.ru).
9. Nesterova T.A., Barbot'ko S.L., Nikolaeva M.F., Gerter Ju.A. Mnogoslojnyj zashhitno-dekorativnyj material dlja dekorirovanija detalej v salonah samoletov i vertoletov [Multi-layer protective decorative material for decorating details in the cabin of aircraft and helicopters] //Trudy VIAM. 2013. №8. St. 4 (viam-works.ru).
10. Obzor rynka teploizoljacionnyh materialov na osnove bazal'tovogo volokna v Rossii [Market Overview of thermal insulating materials, based on basalt fiber in Russia / Report LLC «InfoMine»] /Otchet OOO «Infomajn» (demo-versija). 2007. 145 s.
11. Ohlopkova A.A., Vasil'ev S.V., Gogoleva O.V. Razrabotka polimernyh kompozitov na osnove politetraftorjetilena i bazal'tovogo volokna [Development of polymer composites based on polytetrafluoroethylene and basalt fiber] //Neftegazovoe delo. 2011. №6. S. 404–411 (jelektronnyj nauchnyj zhurnal).
12. Kablov E.N. Aviakosmicheskoe materialovedenie [Aerospace materials] //Vse materialy. Jenciklopedicheskij spravochnik. 2008. №3. S. 2–14.
13. Istorija aviacionnogo materialovedenija. VIAM – 80 let: gody i ljudi [Strategic directions of development of materials and technologies to process them] /Pod obshh. red. E.N. Kablova. M.: VIAM. 2012. S. 505–509.
14. Kablov E.N. Strategicheskie napravlenija razvitija materialov i tehnologij ih pererabotki na period do 2030 goda [Strategic directions of development of materials and technologies to process them for the period up to 2030] //Aviacionnye materialy i tehnologii. 2012. №S. S. 7–17.
15. Kablov E.N. Himija v aviacionnom materialovedenii [Chemicals in aviation materials] //Rossijskij himicheskij zhurnal. 2010. T. LIV. №1. S. 3–4.
16. Kablov E.N. Materialy i himicheskie tehnologii dlja aviacionnoj tehniki [Materials and chemical technologies for aircraft equipment] //Vestnik Rossijskoj akademii nauk. 2012. T. 82. №6. S. 520–530.
17. Gavril'eva A.A., Vinokurov G.G., Kychkin A.K., Oreshko S.M. Tehnologicheskie harakteristiki formovanija bazal'tovyh nepreryvnyh volokon pri fil'ernom sposobe ih poluchenija [Technological characteristics of the molding of basalt continuous fibers spun at their reception] //Izvestija Samarskogo NC RAN. 2013. T. 15. №4(2). S. 448–450.
18. Hodakova N.N., Uglova T.K., Firsov V.V., Tatarinceva O.S. Mineral'noe syr'e Kavkaza dlja proizvodstva bazal'tovyh volokon [Minerals of the Caucasus for the production of basalt fibers] //Polzunovskij vestnik. Prikladnaja himija i smezhnye oblasti. 2013. №1. S. 138–142.
19. Issledovanie rynka armirujushhih izdelij i materialov iz nepreryvnogo bazal'tovogo volokna v Rossii [Market research reinforcing materials and products of continuous basalt fiber in Russia] /Otchet agentstva «Megaresearch» (demo-versija). 2011. 142 s.
20. Stepanova E.V. Struktura i svojstva bazal'toplastikov, armirovannyh bazal'tovymi nitjami raznyh proizvoditelej, i modifikacija ih fizicheskimi i himicheskimi metodami [Structure and properties of basalt fiber reinforced basalt yarns of different manufacturers, and the modification of their physical and chemical methods]: Avtoref. dis. k.t.n. Saratov. 2006. 20 s.
21. Tatarinceva O.S. Izoljacionnye materialy iz bazal'tovyh volokon, poluchennyh indukcionnym sposobom [Insulating materials made of basalt fibers obtained inductively]: Avtoref. dis. d.t.n. Bijsk. 2006. 42 s.
22. Aviacionnye pravila. Gl. 25. Normy letnoj godnosti samoletov transportnoj kategorii [Aviation Regulations. Chap. 25 Standards of Airworthiness transport category airplanes]. 3-e izd. OAO Aviaizdat. 2009. 274 s.
23. Efimov V.A., Shvedkova A.K., Koren'kova T.G., Kirillov V.N. Issledovanie polimernyh konstrukcionnyh materialov pri vozdejstvii klimaticheskih faktorov i nagruzok v laboratornyh i naturnyh uslovijah [Investigation of polymeric structural materials under the influence of climatic factors and stress in laboratory and field conditions] //Trudy VIAM. 2013. №1. St. 05 (viam-works.ru).
24. Skryljov N.S., Vol'nyj O.S., Postnov V.I., Barbot'ko S.L. Issledovanie vlijanija teplovyh faktorov klimata na izmenenie harakteristik pozharobezopasnosti polimernyh kompozicionnyh materialov [Investigation of the influence of thermal factors of climate change on fire characteristics of polymer composite materials] //Trudy VIAM. 2013. №9. St. 05 (viam-works.ru).

dx.doi.org/ 10.18577/2307-6046-2014-0-10-8-8

УДК 669.01

Morozova L.V., Iskhodzhanova I.V.

STUDY OF RELATIONSHIPS OF SURFACE RELIEF CHANGING OF SPECIMENS FROM ALUMINUM-LITHIUM ALLOYS BY LASER MICROSCOPY METHOD

By method of laser scanning confocal microscopy a study of relief changing (surface roughness(Ra), depth of corrosion pittings) of specimens tested under extension till frac-ture both without corrosion environment and under corrosion attack was carried out. 3D-models were drawn up and a quantitative evaluation of surface relief by statistical data processing of roughness, using standard software of LSCM Olympus Lext OLS3100 was carried out. It was shown, that a surface roughness (Ra), as approaching to the fracture location was increasing in 1,5 (for 1441alloy specimens) or in 3 times (for V-1469 alloy specimens) that indicates of more expressed localization of deformation in 1441 alloy.

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Reference list

1. Kablov E.N. Aviacionnoe materialovedenie: itogi i perspektivy [Aeronautical materials: results and prospects] //Vestnik RAN. 2002. T. 72. №1. S. 3–12.
2. Kablov E.N. Strategicheskie napravlenija razvitija materialov i tehnologij ih pererabotki na period do 2030 goda [Strategic directions of development of materials and technologies to process them for the period up to 2030] //Aviacionnye materialy i tehnologii. 2012. №S. S. 7–17.
3. Kablov E.N. Korrozija ili zhizn' [Corrosion or life] //Nauka i zhizn'. 2012. №11. S. 16–21.
4. Fridljander I.N., Chuistov K.V., Berezina A.L., Kolobnev N.I., Koval' Ju.N. Aljuminij-litievye splavy. Struktura i svojstva [Aluminum-lithium alloys. Structure and Properties]. Kiev: Naukova dumka. 1992.
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S. 183–195.
6. Antipov V.V., Senatorova O.G., Tkachenko E.A., Vahromov R.O. Aljuminievye deformiruemye splavy [Aluminum wrought alloys] //Aviacionnye materialy i tehnologii. 2012. №S. S. 167–182.
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dx.doi.org/ 10.18577/2307-6046-2014-0-10-9-9

УДК 614.814.41

Nesterova T.A., Platonov M.M., Sharakina L.A.

EVALUATION OF PROPERTIES OF FIRE SAFETY FABRIC-FILM MATERIAL FOR EMERGENCY SLIDE

Results of research of properties of VRT-10 fabric-film material for emergency slide, manufactured on a base of commercial polyether fabric with double-sided fireproof coating and electro-conducting coating from a face are presented . Influence of higher and lower temperature, climatic impacts on strength characteristics and conductivity of the material was studied. The carried out study showed that the material keeps more than 90% of its strength properties after all influences, except for weft breaking strength after 100°С temperature effect for 200 hours (81,4% preservation of strength).However, in many cases a strength of material remained actually without change. A tearing resistance characteristic decreases after a cyclic drop of temperatures for 10–15%, and increases after above-zero temperatures influence. At direct increase of temperature influence, more considerable decrease of strength and elongation at rupture of VRT-10 grade material takes place. However, a residual valu

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10.

dx.doi.org/ 10.18577/2307-6046-2014-0-10-10-10

УДК 620.165.79:678.8

Stolyankov Yu.V., Iskhodzhanova I.V., Antyufeeva N.V.

ON THE QUESTION OF CARBON FIBER REINFORCED PLASTICS (CFRP) TEST SPECIMEN FLAWS

For strength characteristics and properties evaluation test of composite polymer ma-terials (PCM), i.e. CFRP on the basis of glue epoxy resin and carbon fillers, it is neces-sary to make test specimen first. As a rule test specimen make from CFRP plates pro-duced by means of some molding technique. Cutting tool machining is the most wide-spread method among various existing methods of test specimen production. When studying the cutting technology influence on specimen surface quality some flaws have been reviled in the form of cleavage in addition to cracks and other flaws, which are re-sponsible for test specimen surface quality, and, therefore, the CFRP characteristics. Test specimen flaws have been described with their quantitative estimation. Flaws quantitative estimation technique has been worked out by means of computerized quantitative optical metallographic analysis method.

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Reference list

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18. ASTM D5687М-95. 2002.
19. ISO 20134. 2003.
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11.

dx.doi.org/ 10.18577/2307-6046-2014-0-10-11-11

УДК 620.179:678.8

Shuldeshov Е.М., Lepeshkin V.V., Romanov A.M.

METHOD OF NON-DESTRUCTIVE TESTING OF COMPLEX DIELECTRIC PERMITTIVITY OF INPUT POORLY FILLED LAYERS OF GRADIENT RADAR-ABSORBING POLYMERIC COMPOSITE MATERIALS

Dielectric characteristics of input poorly filled layers of gradient radar-absorbing polymeric composite materials were investigated by nondestructive control method. Methods of measurement of complex dielectric permittivity of samples are described. A stand for carrying out non-destructive testing of complex dielectric permittivity of input layers of radar-absorbing gradient structures is described. Advantages of this method are described, cases of the most reasonable application are considered.

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Reference list

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15. Murashov V.V., Rumjancev A.F. Diagnostika sostava i svojstv polimernyh kompozitov v detaljah i konstrukcijah [Diagnosis of the composition and properties of polymer composites in the details and constructions] //Kontrol'. Diagnostika. 2008. №8. S. 13–17.
16. Sorokin K.V., Murashov V.V., Fedotov M.Ju., Goncharov V.A. Prognozirovanie razvitija defektov v konstrukcijah iz PKM sposobom opredelenija izmenenij zhestkosti pri aktjuirovanii materiala [Prediction of the development of defects in the construction of the PCM method for determining changes in the stiffness of the material at aktyuirovanii] //Aviacionnye materialy i tehnologii. 2011. №2. S. 20–22.
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dx.doi.org/ 10.18577/2307-6046-2014-0-10-12-12

УДК 620.194.22:669.295

Zakharova L.V.

INFLUENCE OF AIR OXYGEN AND THICKNESS OF SALT DEPOSITS ON CORROSION CRACKING OF TITANIUM ALLOYS AT HIGH TEMPERATURES IN CONTACT WITH NaCl

Titanium alloys find a wide application in aircraft equipment operating in all-climatic conditions, where a sea salt deposition on their surface causing hot salt corrosion at raised temperatures (≥250°C) is possible. An influence of salt deposits thickness on corrosion cracking of titanium alloys under conditions of raised temperatures and stretching or alternating loads and also a role of air oxygen in the course of hot salt cor-rosion was studied in this work. As a result of the conducted researches it was established that oxygen of air takes an active part in the process of hot salt corrosion and the main component of hard products of corrosion is TiO2. It was shown that thickness of salt deposits has an impact on cracking resistance of titanium alloys at high temperatures under loads and salt layers of ~50 microns of thickness have the highest aggression.

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