Articles

 


№1 | №2 | №3 | №4 | №5 | №6 | №7 | №8 | №9 | №10 | №11 | №12





1.
dx.doi.org/ 10.18577/2307-6046-2015-0-9-1-1
УДК 620.178.35:669.245
Belyaev M.S., Terentiev V.F., Gorbovets M.A., Bakradze M.M., Antonova O.S.
LOW CYCLE FATIGUE AT TOTAL STRAIN RANGED OF Ni-BASED SUPERAL-LOY VZH175

Investigation of low cycle fatigue of Ni-based superalloy VZH175 was carried out at total strain ranged, symmetrical strain ratio R=-1, strain amplitude ε=0,5–0,8%, tem-peratures 20 and 650°С. Superalloy VZH175 has high mechanical properties under static and cyclic deformation. At LCF sufficiently stable hardening / softening diagrams are observed. Values of LCF limits were evaluated. The special signs of the mechanisms of initiation and propagation of fatigue cracks at temperatures 20 and 650°С were in-vestigated.

Read in Russian

2.
dx.doi.org/ 10.18577/2307-6046-2015-0-9-2-2
УДК 669.018.44:669.245
Chabina E.B.
PHOSPHORUS AND SULFUR SEGREGATION IN MODEL HEAT RESISTING NICKEL ALLOY

Harmful impurity (sulfur and phosphorus) and microalloying additives (boron and lanthanum) competition at model heat resisting nickel alloy of Ni–Co–Cr–Al–Ti–W–Mo–Nb system inner interfaces segregations formation was investigated. It was shown that sulfur and phosphorus form segregation on grain boundaries and interphase interfaces «inclusion – matrix». Boron and lanthanum force out sulfur and phosphorus from interfaces, and these microalloying additives action mechanisms are different: boron refines and strengthens grain boundaries, and the lanthanum connects sulfur and phos-phorus in favorable morphology inclusions

Read in Russian

3.
dx.doi.org/ 10.18577/2307-6046-2015-0-9-3-3
УДК 669.018.44:669.245
Chabina E.B., Lomberg B.S., Filonova E.V., Ovsepyan S.V., Bakradze M.M.
CHANGE OF STRUCTURAL AND PHASE CONDITION OF HEAT RESISTING DEFORMABLE NICKEL ALLOY AT ALLOYING TANTALUM AND RHENIUM

Change of structural and phase condition of heat resisting deformable nickel alloy for disks of the turbines ЭК151 is investigated at additional alloying by rhenium and tantalum. It is established that the alloying rhenium of alloy ЭК151 leads to essential decrease in diffusion activity of principal alloying elements and additional solid solution strengthening. The alloying of alloy ЭК151 tantalum increases quantity of strengthening γ'-phase, promotes forming more thermodynamic steady carbides and particles of γ'-phase.

Read in Russian

4.
dx.doi.org/ 10.18577/2307-6046-2015-0-9-4-4
УДК 669.715
Klochkova Y.Y., Klochkov G.G., Romanenko V.A., Burlyaeva I.P.
STRUCTURE AND PROPERTIES OF EXTRUDED PRODUCTS FROM HI-STRENGTH ALUMINIUM-LITHIUM ALLOY V-1469

An increase of weight efficiency of perspective aerospace vehicles is possible by using aluminium-lithium alloys with low density. Perspective, hi-strength, hi-stiffness, alloy V-1469, based on Al Cu Li system and alloyed with Ag, Sc and Zr, has been developed in VIAM. Industrial technology of manufacturing extruded products from V-1469 alloy was developed. Pressing temperature was chosen. Effects of heat treatment on structure and mechanical properties were studied. Complex of mechanical, corrosion and resource characteristics was investigated.

Read in Russian

5.
dx.doi.org/ 10.18577/2307-6046-2015-0-9-5-5
УДК 669.715
Ryabov D.K., Vakhromov R.O., Ivanova A.O.
EFFECT OF SMALL ADDITION OF ALLOYING ELEMENTS WITH HIGH WITH HIGH SOLUBILITY IN ALUMINIUM ON MICROSTRUCTURE OF INGOTS AND COLD-ROLLED SHEETS OF Al–Mg–Sc ALLOY

For advanced aerospace application it is necessary to develop aluminium alloys of new generation with improved service characteristics. For the purpose of increasing mechanical properties of Al–Mg alloys it is purposeful to add small amount of scandium, but small additives of alloying elements with high solubility also can influence microstructure and properties of semi-products. This study deals with effect of small additives of silver, zink and copper in amount not exceeding maximum solubility on microstructure of ingots and cold-rolled sheets of V-1579 type alloy and it’s mechanical properties

Read in Russian

6.
dx.doi.org/ 10.18577/2307-6046-2015-0-9-6-6
УДК 669.295
Shiryaev A.A., Nochovnaya N.A.
Study of structure and chemical composition of pilot high-alloyed titanium alloy ingots

Chemical composition and structure of a pilot near-beta Ti–Al–Mo–V–Cr–Fe–Sn–Zr–REM titanium alloy ingots have been studied, the ingots having been obtained by means of experimental threefold remelting processes with the use of ALD VAR L200 vacuum-arc furnace. A correlation between alloying elements distribution homogeneity in the ingots and melting technological parameters thereof has been revealed

Read in Russian

7.
dx.doi.org/ 10.18577/2307-6046-2015-0-9-7-7
УДК 669.721.5:546.65
Frolov A.V., Mukhina I.Y., Duyunova V.A., Uridiya Z.P.
THE INFLUENCE OF ALLOYING ELEMENTS AND STRUCTURAL FACTORS ON THE RESISTANCE OF MAGNESIUM ALLOYS

With the progress of engineering, the operating temperature of articles was greatly increased; therefore, creation of casting magnesium alloys with high strength and heat-resistant characteristics is very an urgent task, to which researchers are faced. Provision of high strength and heat resistant properties of cast magnesium alloys can be achieved due to alloying with promising elements, including selection and optimization of thermal processing conditions. An integrated doping of several rare-earth metals of yttrium (Y, Nd) and cerium (Ce, La, Pr) subgroups in different proportions can be perspective. Expensive rare-earth metals such as erbium, gadolinium, samarium and others can be tested as microadditives improving heat-resistant characteristics of the alloy. In this article some peculiarities of behavior of cast magnesium alloys at elevated temperatures and the influence of doping on their properties were considered. It shows the influence of temperature and duration of soaking du

Read in Russian

8.
dx.doi.org/ 10.18577/2307-6046-2015-0-9-8-8
УДК 669.715:678.026
Mikov D.A., Kutyrev A.E., Petrova V.A.
HYDROPHOBIC STRUCTURES FOR ADDITIONAL PROTECTION OF ALUMI-NUM ALLOYS IN FUEL SYSTEMS OF PRODUCTS OF AVIATION EQUIPMENT

In this work functional polymer coatings which can be used as hydrophobic pro-cessing for increase of protective properties the aluminum alloys working in fuels at in-fluence of condensate are investigated. Data on resistance in the salt spray chamber and fuel of functional polymer coatings on aluminum alloy are obtained. The most effective hydrophobic agents for receiving polymer coatings are functional fluorinated oligomers. As express method the measurement method to regional corners of wetting was used by water. On the basis of the carried-out researches structures of functional polymer coatings which can be used in fuel systems of products of aviation equipment for additional pro-tection of aluminum alloys are developed.

Read in Russian

9.
dx.doi.org/ 10.18577/2307-6046-2015-0-9-9-9
УДК 669.783:669.245
Goundobin N.V., Titov V.I., Pilipenko L.V.
DETERMINATION GERMANIUM IN ALLOYS OF Ni–Ti–Fe–Co–Si–Ge SYSTEM

The paper shows the possibility of the determination of germanium in alloys nitinol of the Ni–Ti–Fe–Co–Si–Ge using extraction-photometric method. For the separation of germanium from hindering its defining elements and from the alloy base and others used the extraction of germanium by tetrachlorides from the salt – acid solution. The extractant used carbon tetrachloride. After stripping water germanium determined phenylfluorone as a complex phenilfluoronatum of germanium yellow-orange color in a weakly acid medium (0,3 N on HCl). The technique determination of germanium in the concentration range 0,01–1% by weight. alloys of Ni–Ti–Fe–Co–Si–Ge.

Read in Russian

10.
dx.doi.org/ 10.18577/2307-6046-2015-0-9-10-10
УДК 678.8
Donetskiy K.I., Raskutin A.E., Hilov P.A., Lykianenko Yu.V., Belinis P.G., Korotigin A.A.
BRAIDING AND WOVEN TEXTILE PREFORMES FOR THE MANUFACTURING FIBER REINFORCED PLASTICS (REVIEW)

Currently, technology without the autoclave manufacturing fiber reinforced plastics with use as braiding and woven volume preform, it is mastered by number of the foreign companies, and finds application in space mechanical engineering. Such materials are characterized by considerable resistance to stratifying, high fatigue indicators, high strength in zone of concentrators of tension. Use volume preform allows to simplify problem of connections in combined designs, to provide possibility of automation of production

Read in Russian

11.
dx.doi.org/ 10.18577/2307-6046-2015-0-9-11-11
УДК 667.621:678.8
Petrova A.P., Dement’eva L.A., Lukina N.F., Chursova L.V.
ADHESIVE BINDERS FOR POLYMER COMPOSITE MATERIALS BASED ON CARBON- AND GLASS FILLERS

Some basic physical, mechanical and rheological properties of the developed adhesive epoxy melt-based binders are presented. Distinctive features of adhesive prepregs based on adhesive binders and fiberglass or carbon fillers are listed and results of their application are given. The fields of application, advantage and efficiency of composite materials based on adhesive prepregs are shown. Possible applications of these materials in structures of aerospace equipment are described as well.

Read in Russian

12.
dx.doi.org/ 10.18577/2307-6046-2015-0-9-12-12
УДК 620.1:666.11/.28
Yakovlev N.O., Sentiourin E.G., Kharitonov G.M.
RUBBER-LIKE ELASTIC STRAIN FEATURES IN ORGANIC GLASS DURING UNLOADING AT TEMPERATURES NEAR TO THE SOFTENING TEMPERATURE

Results of the rubber-like elastic strain increase and recovery research for BOC-2 (copolymer with rarely crosslinked structure) and CO-120 (polymer with linear structure) organic glasses marks during «instant» and «forced» unloading at operating temperatures. The strain recover features that experimental determined at unloading the organic glasses at near the softening temperature demonstrate the need their accounting in the design of future aircraft glassing.

Read in Russian