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    Wyświetlanie 1-8 z 8
    Tytuł:
    Effect of hot isostatic pressing on the microstructure of turbine blade airfoil made of nickel-base superalloy
    Autorzy:
    Chmiela, B.
    Kościelniak, B.
    Cwajna, J.
    Powiązania:
    https://bibliotekanauki.pl/articles/353304.pdf
    Data publikacji:
    2017
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    superalloys
    turbine blades
    HIP
    EBSD
    Opis:
    Turbine blades are flight safety parts in the jet engine. Therefore they should be characterized by very good mechanical properties, especially high creep resistance and fatigue strength at high temperature. The mechanical properties of blades made of nickel-based superalloys depend on the microstructure of the casting and its porosity [1,2]. The aim of this paper is evaluation of effect of hot isostatic pressing (HIP) on microstructure of blade airfoil made of IN713C superalloy in four important zones: (i) leading edge, (ii) trailing edge, (iii) suction side and (iv) pressure side. HIP treatment was carried out proving some significant microstructural changes. Electron backscatter diffraction (EBSD) analysis reveals some structural changes what may facilitate diffusion processes leading to simplify of a heat treatment (solution treatment and aging).
    Źródło:
    Archives of Metallurgy and Materials; 2017, 62, 1; 241-245
    1733-3490
    Pojawia się w:
    Archives of Metallurgy and Materials
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Quantitative Evaluation of Porosity in Turbine Blades Made of IN713C Superalloy After Hot Isostatic Pressing
    Autorzy:
    Roskosz, S.
    Powiązania:
    https://bibliotekanauki.pl/articles/355974.pdf
    Data publikacji:
    2017
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    superalloys
    turbine blades
    hot isostatic pressing
    porosity
    Opis:
    The aim of this paper is an assessment of the influence of hot isostatic pressing treatment on porosity of cast samples - turbine blades and vane clusters made of the IN713C superalloy. Two variants of HIP treatments, differing in pressure from each other, have been used. The quantitative evaluation of the porosity was performed using light microscopy and quantitative metallography methods. The use of the hot isostatic pressing significantly decreased the volume fraction and size of pores in the test blades, the remaining pores after the HIP process being characterized by a round shape. The increased pressure has caused significant reductions in the area fraction and size of the pores.
    Źródło:
    Archives of Metallurgy and Materials; 2017, 62, 1; 253-258
    1733-3490
    Pojawia się w:
    Archives of Metallurgy and Materials
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Electrochemical machining - special equipment and applications in aircraft industry
    Autorzy:
    Ruszaj, A.
    Gawlik, J.
    Skoczypiec, S.
    Powiązania:
    https://bibliotekanauki.pl/articles/407012.pdf
    Data publikacji:
    2016
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    electrochemical machining
    machining of special materials
    turbine blades
    aircraft engines
    Opis:
    Electrochemical machining is an unique method of shaping in which, for optimal parameters tool has no wear, surface layer properties after machining are similar to the core material and surface quality and accuracy increase together with material removal rate increase. Such advantages of electrochemical machining, besides of some ecological problems, create industry interest in the range of manufacturing elements made of materials with special properties (i.e. turbine blades of flow aircrafts engines). In the paper the nowadays possibilities and recent practical application of electrochemical machining in aircraft have been presented.
    Źródło:
    Management and Production Engineering Review; 2016, 7, 2; 34-41
    2080-8208
    2082-1344
    Pojawia się w:
    Management and Production Engineering Review
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Isothermal Oxidation of Thermal Barrier Coatings Deposited Using LPPS, CVD, and PS-PVD Methods on MAR M247 Nickel Superalloy
    Autorzy:
    Góral, Marek
    Kubaszek, Tadeusz
    Pytel, Maciej
    Powiązania:
    https://bibliotekanauki.pl/articles/176039.pdf
    Data publikacji:
    2020
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    thermal barrier coatings
    overaluminizing
    PS-PVD
    LPPS
    turbine blades
    aluminizing processes
    Opis:
    The article presents the results of microstructural characterization of newly developed three-layer thermal barrier coating (TBC) after isothermal oxidation test. Bond coats were deposited by the overaluminizing of MCrAlY coating deposited by low-pressure plasma spraying (LPPS) process. The outer ceramic layer of yttria-stabilized zirconia was deposited by the plasma spray physical vapor deposition process. The TBCs with MCrAlY bond coat without aluminizing process was produced by LPPS as well. The isothermal oxidation test at 1,100°C for 1,000 h showed that the thickness of the thermally grown oxides alumina oxide layer on overaluminized bond coats was significantly thinner in comparison with conventional LPPS-sprayed MCrAlY bond coats. The possibility of the presence of NiAl and Ni3Al phases in the outer zone of overaluminized bond coat after the oxidation test was observed.
    Źródło:
    Advances in Manufacturing Science and Technology; 2020, 44, 1; 9-14
    0137-4478
    Pojawia się w:
    Advances in Manufacturing Science and Technology
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Dendritic Structure Analysis of CMSX-4 Cored Turbine Blades Roots
    Autorzy:
    Krawczyk, J.
    Powiązania:
    https://bibliotekanauki.pl/articles/355017.pdf
    Data publikacji:
    2016
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    single-crystalline turbine blades
    nickel-base superalloy
    dendritic structure
    x-ray topography
    SEM
    Opis:
    The microstructure of as-cast cored turbine blades roots, made of the single-crystal CMSX-4 nickel-based superalloy was investigated. Analysed blades were obtained by directional solidification technique in the industrial ALD Bridgman induction furnace. The investigations of the microstructure of blades roots were performed using SEM and X-ray techniques including diffraction topography with the use of Auleytner method. Characteristic shapes of dendrites with various arrangement were observed on the SEM images taken from the cross-sections, made transversely to the main blades axis. The differences in quality of the structure in particular areas of blades roots were revealed. Based on the results, the influence of cooling bores on blades root structure was analysed and the changes in the distribution and geometry of cooling bores were proposed.
    Źródło:
    Archives of Metallurgy and Materials; 2016, 61, 2B; 1129-1134
    1733-3490
    Pojawia się w:
    Archives of Metallurgy and Materials
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Evaluation of Carbides in Turbine Blade Made of IN713C Superalloy After Hot Isostatic Pressing
    Autorzy:
    Kościelniak, B.
    Roskosz, S.
    Cwajna, J.
    Powiązania:
    https://bibliotekanauki.pl/articles/351248.pdf
    Data publikacji:
    2017
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    IN713C superalloy
    hot isostatic pressing
    turbine blades
    qualitative and quantitative analysis of carbides
    Opis:
    The IN713C is nickel-based superalloy, used to produce low pressure turbine blades in a process of investment casting. However, porosity which is formed during the casting, decreases mechanical properties of IN713C. Therefore, to eliminate porosity, a process of hot isostatic pressing was applied. Nonetheless, HIP also least to some changes in the microstructure of tested material. The main aim of this paper is to characterize the morphology of carbides before and after hot isostatic pressing. Microstructural characterization was carried out with the use of a scanning electron microscope equipped with an energy dispersive X-ray spectrometer and an electron backscatter diffraction detector. The size and shape of carbides were evaluated by quantitative metallography methods methods. The results show that the amount, size and heterogeneity of arrangement of the carbides increased after application of HIP treatment.
    Źródło:
    Archives of Metallurgy and Materials; 2017, 62, 1; 247-252
    1733-3490
    Pojawia się w:
    Archives of Metallurgy and Materials
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Application of Non-Destructive Methods to Quality Assessment of Pattern Assembly and Ceramic Mould in the Investment Casting Elements of Aircraft Engines
    Zastosowanie nieniszczących metod do oceny jakości woskowych zestawów modelowych oraz ceramicznych form w procesie odlewania precyzyjnego elementów silników lotniczych
    Autorzy:
    Żaba, K.
    Nowak, S.
    Kwiatkowski, M.
    Nowosielski, M.
    Kita, P.
    Sioma, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/354370.pdf
    Data publikacji:
    2014
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    special processes
    investment casting
    turbine blades
    3D scan
    thermovision
    computed tomography
    proces specjalny
    odlewanie precyzyjne
    łopatki turbin
    3D
    termowizja
    tomografia komputerowa
    Opis:
    The aim of this paper is manufacturing of turbocharger engine jet blades made of nickel superalloys. Processes for producing molds and casting realized in a production line are special processes. It means that the results are known only after inspection of the finished product. There is lack of the methods and techniques of effective and efficient quality control of the work in stock, above all molds. Therefore, the unknown is the state ceramic mold for the precision casting, which resulting in risk of referral to a defective mold of the casting process and thus give the product does not comply, is eliminated in the final inspection. One method of reducing this risk is particularly thorough monitoring of all parameters of each process and keeping them in the desired operating point. Operating point is a set of parameters of processes. Such monitoring is possible with the commitment to the methods and techniques to automatically, without human intervention, data collection and processing methods appropriate for use in operational control. The paper presents results of research on the attitude to the problem of a special process. This change is the introduction to the process efficient and effective form of quality control tools in the course of its preparation. In this case, the method of photogrammetry, thermal imaging and computed tomography were used. With the infrared camera will be possible to determine the temperature field, the disorder in relation to the pattern indicates the type of defect. Computed tomography and will be used to develop patterns of correlated defects associated with thermal imagers. Photogrammetry is the use of a model set of quality control (comparison of the actual state of the model *.CAD). It also allows the designation of a wall thickness of the mold.
    Referat dotyczy procesu wytwarzania łopatek turbosprężarek silników odrzutowych wykonanych z nadstopów niklu. Procesy wytwarzania form i odlewania, realizowane w linii technologicznej są procesami specjalnymi. Oznacza to, że ich wyniki są znane dopiero po kontroli wyrobu gotowego. Brak jest, bowiem metod i technik efektywnej i skutecznej kontroli jakości półproduktu, przede wszystkim formy. Tym samym nieznany jest stan formy przeznaczanej do odlewania, co skutkuje ryzykiem skierowania do procesu odlewania wadliwej formy i tym samym wytworzeniem wyrobu niezgodnego, eliminowanego dopiero podczas końcowej kontroli odbiorczej. Jedną z metod zmniejszania tego typu ryzyka jest szczególnie gruntowne nadzorowanie wszystkich parametrów poszczególnych procesów i utrzymanie ich w wybranym punkcie pracy. Punkt pracy jest zbiorem parametrów realizacji procesów. Takie nadzorowanie jest możliwe w przypadku zaangażowania do tego celu metod i technik automatycznego, bez udziału człowieka, zbierania danych oraz metod właściwego ich przetwarzania na użytek operacyjnego sterowania. W artykule przedstawiono wyniki badań nad zmianą podejścia do problemu procesu specjalnego. Zmiana ta polega na wprowadzeniu do procesu efektywnych i skutecznych narzędzi kontroli jakosci formy w trakcie jej wytwarzania. W tym celu wykorzystano metody fotogrametrii, termowizji oraz tomografii komputerowej. Dzięki zastosowaniu kamery termowizyjnej możliwe będzie określenie pola temperatury, którego zaburzenie w stosunku do wzorca wskaże na rodzaj wady. Tomografia komputerowa natomiast będzie służyła do opracowania wzorców wad skorelowanych z obrazami termowizyjnymi. Fotogrametria znajduje natomiast zastosowanie w kontroli jakości zestawu modelowego (porównanie rzeczywistego stanu z modelem *.CAD). Umożliwia także wyznaczenie grubości ścianki formy.
    Źródło:
    Archives of Metallurgy and Materials; 2014, 59, 4; 1517-1525
    1733-3490
    Pojawia się w:
    Archives of Metallurgy and Materials
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Application of Modified Cores for Grain Refinement in Castings of Aircraft Turbine Blades
    Autorzy:
    Binczyk, F.
    Cwajna, J.
    Gradoń, P.
    Powiązania:
    https://bibliotekanauki.pl/articles/382651.pdf
    Data publikacji:
    2017
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    innovative casting materials
    innovative casting technologies
    Nickel alloy IN-713C
    surface modification
    turbine blades
    macrostructure
    innowacyjne materiały odlewnicze
    innowacyjne technologie odlewnicze
    Stop niklu IN-713C
    modyfikacja powierzchni
    łopatki turbinowe
    makrostruktura
    Opis:
    Paper presents the results of research on modified surface grain refinement method used in investment casting of hollow, thin-walled parts made of nickel based superalloys. In the current technology, the refining inoculant is applied to the surface of the wax pattern and then, it is transferred to the ceramic mould surface during dewaxing. Because of its chemical activity the inoculant may react with the liquid metal which can cause defects on the external surface of the cast part. The method proposed in the paper aims to reduce the risk of external surface defects by applying the grain refiner only to the ceramic core which shapes the internal surface of the hollow casting. In case of thin-walled parts the grain refinement effect is visible throughout the thickness of the walls. The method is meant to be used when internal surface finish is less important, like for example, aircraft engine turbine blades, where the hollowing of the cast is mainly used to lower the weight and aid in cooling during operation.
    Źródło:
    Archives of Foundry Engineering; 2017, 17, 3; 19-22
    1897-3310
    2299-2944
    Pojawia się w:
    Archives of Foundry Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-8 z 8

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