Articles

 


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





1.
dx.doi.org/ 10.18577/2307-6046-2016-0-10-1-1
УДК 621.74:629.7.03-226.2
Gerasimov V. V.
From single-crystal uncooled blades to turbines blades with penetration (transpiration) cooling made by additive technologies (review on technology of single-crystal GTE bladescasting)

Stages of formation and development of single-crystal blade casting of heat resistant intermetallic alloys, composite alloys like VKLS, the creation of experimental industrial and industrial equipment for directed crystallization process and also development of blades cooling systems through creation of complex internal cavities are adduced. The problems connected with blades manufacture with the penetrating cooling system are considered. The forecast of getting blades with the penetrating cooling system without application of ceramic forms and cores, i.e. by additive technology is discussed.

Read in Russian

2.
dx.doi.org/ 10.18577/2307-6046-2016-0-10-2-2
УДК 669.245:669.018.44
Buyakina A.A., Letnikov M.N., Bakradze M.M., Shugaev S.A.
The effect of thermomechanical and heat treatment parameters on structure and mechanical properties of superalloy VZH177

The effect of parameters of thermomechanical and heat treatment on microstructure and phase composition change of alloy at all the stages of flat forgings production of new superalloy VG177 including ingot homogenization, isothermal forging and heat treatment is studied. The comparative tests results of tensile strength, impact strength and high-temperature strength are presented. The effect of long high temperature exposures simulating operation time on microstructure and mechanical properties of the item is investigated.

Read in Russian

3.
dx.doi.org/ 10.18577/2307-6046-2016-0-10-3-3
УДК 621.98.043
Ponomarenko D.A., Skugorev A.V., Sidorov S.A., Shpagin A.S.
Influence of heat exchange between workpiece and die on forming process of aerospace parts by special isothermal presses

The forming process of aerospace parts by special isothermal hydraulic presses of 6,3 and 16 MN with additional technical equipment is considered. Technological capabilities of their effective use for manufacturing parts of various typical sizes from Titanium-based, Nickel – based and other alloys in air environment using ZhS6U cast alloy dies are shown. Influence of low-speed forming in various temperature gradients between workpiece and die on power parameters of forging, forming process of workpieces and their structure changes are studied. The article presents the possibility of using the heat exchange between workpiece and die to improve deformation process. The work is executed within implementation of the complex scientific direction 10.2. «Isothermal deformation on air of heterophased difficult-to-form superalloys of new generation» («The strategic directions of development of materials and technologies of their processing for the period till 2030»)

Read in Russian

4.
dx.doi.org/ 10.18577/2307-6046-2016-0-10-4-4
УДК 669.017.165
Bazyleva O.A., Unchikova M.V., Turenko E.Yu., Bagetov V.V., Shestakov A.V.
Study of heat treatment effect on structure, dendritic liquation parameters and time to failure of Ni3Al-based alloy containing Re

The influence of high temperature annealing on the microstructure, dendritic liquation parameters and time to failure of intermetallic Re-containing alloy VIN1 (VKNA-25) is investigated. It is shown that reduction of liquation due to annealing leads to rise of time to failure of Ni3Al-based intermetallic alloy. By regression analysis the correlation between time to failure and parameters of annealing is fixed. The convergence of the regression model and experimental data is <1,5%.

Read in Russian

5.
dx.doi.org/ 10.18577/2307-6046-2016-0-10-5-5
УДК 669.018.45
Ospennikova O.G., Podjyachev V.N., Stolyankov Yu.V.
Refractory alloys for innovative equipment

Modern development of innovative equipment (primarily aviation and aerospace) makes demands to materials capable to work at high temperatures in which traditional nickel alloys cannot work. The problem of creating new heat resistant including refractory alloys acquires nowadays particular significance not only in the aircraft industry in connection with development of high-economic gas turbine engines of new generation, but also in other industries. One of the promising scientific and research directions in this field is the refractory metals and alloys development which keep considerable durability up to temperatures of 1300–2500°C. Among the metals of the kind the «big four» – tungsten, tantalum, molybdenum, niobium are outstanding that both in pure or as alloys widely used in various industrial fields.

Read in Russian

6.
dx.doi.org/ 10.18577/2307-6046-2016-0-10-6-6
УДК 629.7.023
Aleksandrov D.A., Artemenko N.I.
Wear-resistant coatings to protect friction parts of modern gas turbine engines

The article presents perspectives for application of wear-resistant coatings for gas turbine engine friction parts. The main directions of development of wear-resistant coatings abroad, as well as results of work on development of high wear-resistant coatings are adduced. The data on the durability, heat resistance, wear-resistant coatings metallographic studies are presented. The research is executed within the implementation of the complex scientific direction 17.3. «Multi-layer heat-resistant coatings, nanostructured strengthening erosion and corrosion-resistant, wear-resistant, anti-fretting coatings to protect parts of hot section and compressor of turbine engine and gas turbine» («The Strategic directions of development of materials and technologies of their processing for the period till 2030»)

Read in Russian

7.
dx.doi.org/ 10.18577/2307-6046-2016-0-10-7-7
УДК 621.791.724
Lukin V.I., Ioda E.N., Panteleev M.D., Skupov A.A.
Peculiarities of high-strength aluminum-lithium alloys laser weldin

The structure formation features and mechanical properties of laser welded joints of Al–Li alloys V-1461, V-1469 are studied. It is found that the use of Al–Cu (Al–6Cu and Al–10Cu) filler materials improves the welded seam formation and mechanical properties of welded joint, reduces probability of defects formation such as porosity and incomplete fusion. For the welding joints done by laser welding with or without filler materials Sv-1201 and Sv-1217 there is no tendency to exfoliation and intergranular corrosion of laser welded joints. Postweld heat treatment slightly reduces the corrosion resistance. The work is executed within the frames of the complex scientific direction 10.8. «Fusion welding technologies of new structural materials» («The strategic direction of development of materials and technologies of their processing for the period till 2030»)

Read in Russian

8.
dx.doi.org/ 10.18577/2307-6046-2016-0-10-8-8
УДК 669.018.44
Karachevtsev F.N., Letov A.F., Protsenko O.M., Yakimova M.S.
Development and application of certified reference materials of airborne advanced alloys

Control of a chemical composition of alloys in conditions of modern metallurgical production is carried out by an optical emission analysis method. However, matrix effects and spectral interferences significantly impact on the accuracy of analysis results. It is possible to minimize systematic errors using certified reference materials (CRM's) with similar chemical composition to the analyzed alloy. Therefore the development and application of CRM's of composition of new advanced alloys is an actual task. This work presents information on CRMs of composition of advanced aviation alloys which developed in FSUE «VIAM». The work is executed within implementation of the complex scientific direction 2.1. «Fundamentally oriented research» («The strategic directions of development of materials and technologies of their processing for the period till 2030»)

Read in Russian

9.
dx.doi.org/ 10.18577/2307-6046-2016-0-10-9-9
УДК 678.073
Platonov M.M., Petrova G.N., Larionov S.A., Barbotko S.L.
Polymer composition on the basis of polydodecanolactam for 3D-printing technology by melted polymer string

The results of research of the properties of thermoplastic polymer composition on the basis of polydodecanolactam (PA-12 polyamide) for creation of a new material with the lowered fire hazard for FDM of the additive technology are presented. On the basis of the spent researches it is shown that the composition on the basis of PA-12, comprising in its composition a halogenated flame retardant, possesses the viscosity comparable to materials used for 3D-printing, such as ABS plastic and Nylon-618 and also the improved characteristics of fire safety. The factual results can find application in the creation of functional products for aircraft interior by 3D--printing methods meeting the requirements of AP-25 on fire safety characteristics.

Read in Russian

10.
dx.doi.org/ 10.18577/2307-6046-2016-0-10-10-10
УДК 620.179
Chertishchev V.Yu., Generalov A.S.
Efficiency improving of ultrasonic control of products with flat-parallel boundaries by antenna arrays digital focusing by C-SAFT method

The physical principles are considered and a simplified acoustic tract calculation algorithm for the C-SAFT antenna arrays digital focusing method with arbitrary size prism is developed heedful of any number of reflections and transformations of types of waves, improving efficiency of ultrasonic testing of products with flat-parallel boundaries. Existing techniques of digital focusing for given control items are either solve numerically the inverse task of diffraction with a certain set of assumptions and may not provide sufficient throughput capability, or use simplified algorithms which are not attentive to many important criteria (the presence of the inclined prism for antenna array, the attenuation of the signal amplitude on the way from the source to the receiver, the transformation of types of waves, etc.) that negatively affects the accuracy of the synthesized image and respectively reliability of control. To eliminate these shortcomings an algorithm for the reconstruction of

Read in Russian

11.
dx.doi.org/ 10.18577/2307-6046-2016-0-10-11-11
УДК 678.8
Petrova G.N., Starostina I.V., Rumyantseva T.V.
Study of the possibility of marking parts of polycarbonate

Research results on the matter of thermoplastic polymer – polycarbonate parts marking are adduced. Influence of marking composition on the physical and mechanical characteristics of the pure (not modified) and modified by polycarbonate fluoropolymer 42 is studied. The polymers properties dependences on marking presence and kind of influence (thermal and heat – humidity aging) are adduced. It is found that applying the marking composition on polycarbonate practically does not make impact on mechanical properties of material and does not reduce «silver-resistance» of the pure and modified polycarbonate. It is shown that the marking paint of 7010 series and marking composition on the basis of VK-14 glue can be used for marking parts of polycarbonate as pure so modified by the fluoropolymer 42.

Read in Russian

12.
dx.doi.org/ 10.18577/2307-6046-2016-0-10-12-12
УДК 620.1:669.715
Startsev V.O., Medvedev I.M., Startsev O.V.
Рrognostication of surface temperature of epoxy coatings on aluminum alloy subjected to long exposure in natural climate conditions

The variations in surface temperature of D16-AT aluminum samples with white, grey and black epoxy coatings subjected to 9 years of natural weathering in Gelendzhik Climatic Testing Center are studied. The multilinear predication model of temperature variations including 12 meteorological indexes is proposed to predict the sample surface temperature. High reliability of model is shown. The rigorous 12-month intervals in the value of mean square error of monthly models surface temperature prediction are shown.

Read in Russian