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    Wyświetlanie 1-11 z 11
    Tytuł:
    The Relationship Between the Solidification Parameters and Chemical Composition of Nickel Superalloy IN-713C
    Autorzy:
    Binczyk, F.
    Gradoń, J.
    Cwajna, J.
    Szymszal, J.
    Powiązania:
    https://bibliotekanauki.pl/articles/383245.pdf
    Data publikacji:
    2014
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    innovative casting materials
    innovative casting technologies
    nickel alloy IN-713C
    thermal analysis
    solidification parameters
    innowacyjne materiały odlewnicze
    innowacyjne technologie odlewnicze
    stop niklu IN-713C
    analiza termiczna
    parametry zestalania
    Opis:
    The paper presents the results of studies on the development of correlation of solidification parameters and chemical composition of nickel superalloy IN-713C, which is used i.a. on aircraft engine turbine blades. Previous test results indicate significant differences in solidification parameters of the alloy, especially the temperatures Tliq and Tsol for each batch of ingots supplied by the manufacturer. Knowledge of such a relationship has important practical significance, because of the ability to asses and correct the temperatures of casting and heat treatment of casts on the basis of chemical composition. Using the statistical analysis it was found that the temperature of the solidification beginning Tliq is mostly influenced by the addition of carbon (similar to iron alloys). The additions of Al and Nb have smaller but still significant impact. Other alloying components do not have significant effect on Tliq. The temperature Teut is mostly affected by Ni, Ti and Nb. The temperature Tsol is not in any direct correlation with the chemical composition, which is consistent with previous research. The temperature Tsol depends primarily on the presence of non-metallic inclusions present in feed materials and introduced during the melting and casting processes.
    Źródło:
    Archives of Foundry Engineering; 2014, 14, 4; 5-10
    1897-3310
    2299-2944
    Pojawia się w:
    Archives of Foundry Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    The Influence of Macrostructure of Nickelbased Superalloys IN713C and MAR 247 on the Characteristics of High-temperature Creep
    Autorzy:
    Cieśla, M.
    Binczyk, F.
    Mańka, M.
    Findziński, R.
    Powiązania:
    https://bibliotekanauki.pl/articles/380019.pdf
    Data publikacji:
    2014
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    nickel alloy IN-713C
    superalloy Mar-247
    macrostructure
    modification
    creep
    stop niklu IN-713C
    nadstop Mar-247
    modyfikacja
    Opis:
    The study consisted in assessing the influence of surface and volume modification on the characteristics of high-temperature creep of castings made of waste products of nickel-based superalloys IN 713C and the MAR-247. The results of high-temperature creep tests performed under conditions of two variants of research were analysed. The characteristics of creep according to variant I were obtained on the basis of earlier studies of these alloys with the parameters T=982oC, σ=150MPa [1]. Variant II included carrying out creep tests of alloy IN713C with the parameters T=760oC, σ =400MPa and alloy MAR247 with the parameters: T=982oC, σ=200MPa.Developed creep characteristics were compared with the results of these alloys with the parameters according to variant I of the study. It was observed that the conditions of experiments carried out depending upon the value of the creep test temperature and stress with the creep stability depends on the size of the macrograin (I variant of the studies) or such influence was not observed (II variant of the studies). Stability of samples with coarse structure in variant I of creep tests was significantly higher than the samples with fragmented grain. It was found that the observed stability conditions are dependent on the dominant deformation mechanisms under creep tests carried out - diffusion mechanism in variant I and a dislocation mechanism in variant II of the study. The conditions for the formation and growth of the cracks in the tested materials, including the morphological characteristics of their macro-and microstructure were tested.
    Źródło:
    Archives of Foundry Engineering; 2014, 14, 4; 11-16
    1897-3310
    2299-2944
    Pojawia się w:
    Archives of Foundry Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    The Impact of the Thickness of the Ceramic Shell Mould on the (γ + γ) Eutectic in the IN713C Superalloy Airfoil Blade Casting
    Autorzy:
    Szczotok, A.
    Nawrocki, J.
    Pietraszek, J.
    Powiązania:
    https://bibliotekanauki.pl/articles/356978.pdf
    Data publikacji:
    2017
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    investment casting
    IN713C superalloy
    (y+y') eutectic
    computing methods
    statistical analysis
    repeatability
    Opis:
    In the study the wall thickness of ceramic shell mould influence on (γ + γ') eutectic in the IN713C nickel-based superalloy airfoil blade casting was described. Two castings formed as a blade from two wax pattern assemblies were analysed. In the experiment in one pattern the thick ceramic layer was obtained on pressure side and in another one on suction side of the airfoil blade. The microstructure of the crosssections of the castings were observed on polished and etched metallographic specimens. The microstructure and phases chemical compositions of specimens was analyzed by using the scanning electron microscope Hitachi S-4200 equipped with EDS. It was established, that wall thickness of ceramic shell mould affect size, shape and volume fraction of (γ + γ') eutectic islands in airfoil blade made from IN713C superalloy. The analysis was provided in accordance to the typical statistical methodology [1].
    Źródło:
    Archives of Metallurgy and Materials; 2017, 62, 2A; 587-593
    1733-3490
    Pojawia się w:
    Archives of Metallurgy and Materials
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    The fixed-effects analysis of the relation between SDAS and carbides for the airfoil blade traces
    Autorzy:
    Pietraszek, J.
    Szczotok, A.
    Radek, N.
    Powiązania:
    https://bibliotekanauki.pl/articles/351316.pdf
    Data publikacji:
    2017
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    microstructure
    SDAS
    IN713C
    superalloy
    Opis:
    The primary objective was to test a usefulness of the specific fixed-effect model for the analysis of quantitative relationships gathered from the image analysis of the material microstructures. The dataset was obtained from the investigation of turbine blades made from superalloy IN713C. The analysis based on the general linear model resulted in informative plots revealing mutual relationships between secondary dendrite arm spacing and the mean plane section area of carbides in the material. Directions for further research also were obtained.
    Źródło:
    Archives of Metallurgy and Materials; 2017, 62, 1; 235-239
    1733-3490
    Pojawia się w:
    Archives of Metallurgy and Materials
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    The Effect of Temperature on the Result of Complex Modification of IN-713C Superalloy Castings
    Autorzy:
    Binczyk, F.
    Gradoń, P.
    Mańka, M.
    Findziński, R.
    Powiązania:
    https://bibliotekanauki.pl/articles/383137.pdf
    Data publikacji:
    2015
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    Innovative casting material
    innovative casting technology
    nickel alloy IN-713C
    modification
    cobalt aluminate
    macrostructure
    innowacyjny materiał odlewniczy
    innowacyjna technologia odlewnicza
    stop niklu IN-713C
    glinek kobaltu
    makrostruktura
    Opis:
    The paper presents the results of research on the determination of the effect of pouring temperature on the macrostructure of the castings subjected to complex (surface and volume) modification and double filtration. Tested castings were made of post-production scrap (gating system parts) of IN-713C superalloy. Tests included the evaluation of the number of grains per 1 mm2, mean grain surface area, shape factor and tensile strength. Casting temperature below 1470 °C positively influenced the modification effect. The grains were finer and the mechanical properties increased, especially for castings with thicker walls. On the other hand, manufacture of thin walled castings of high quality require pouring temperature above 1480 °C.
    Źródło:
    Archives of Foundry Engineering; 2015, 15, 4; 13-16
    1897-3310
    2299-2944
    Pojawia się w:
    Archives of Foundry Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Surface Modification of Cored, Thin Walled Castings of Nickel Superalloy IN-713C
    Autorzy:
    Binczyk, F.
    Cwajna, J.
    Gradoń, P.
    Mańka, M.
    Findziński, R.
    Powiązania:
    https://bibliotekanauki.pl/articles/381063.pdf
    Data publikacji:
    2015
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    Innovative casting material
    innovative casting technology
    nickel alloy IN-713C
    surface modification
    cobalt aluminate
    macrostructure
    innowacyjny materiał odlewniczy
    innowacyjna technologia odlewnicza
    stop niklu IN-713C
    modyfikacja powierzchni
    glinek kobaltu
    makrostruktura
    Opis:
    In current casting technology of cored, thin walled castings, the modifying coating is applied on the surface of wax pattern and, after the removal of the wax, is transferred to inner mould surface. This way the modification leading to grain refinement occur on the surface of the casting. In thin walled castings the modification effect can also be seen on the other (external) side of the casting. Proper reproduction of details in thin walled castings require high pouring temperature which intensify the chemical reactions on the mould – molten metal interface. This may lead to degradation of the surface of the castings. The core modification process is thought to circumvent this problem. The modifying coating is applied to the surface of the core. The degradation of internal surface of the casting is less relevant. The most important factor in this technology is “trough” modification – obtaining fine grained structure on the surface opposite to the surface reproduced by the core.
    Źródło:
    Archives of Foundry Engineering; 2015, 15, 3; 17-20
    1897-3310
    2299-2944
    Pojawia się w:
    Archives of Foundry Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Metallographic Study and Repeatability Analysis of γ Phase Precipitates in Cored, Thin-Walled Castings Made from IN713C Superallo
    Autorzy:
    Szczotok, A.
    Pietraszek, J.
    Radek, N.
    Powiązania:
    https://bibliotekanauki.pl/articles/354156.pdf
    Data publikacji:
    2017
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    IN713C
    superalloy
    γ' phase
    metallography
    statistical analysis
    Opis:
    The study describes the influence of a surface modification in cored, thin-walled castings of blades from IN-713C nickel superalloy on γ' phase precipitates. The blades were produced by using the investment casting process in the laboratory conditions as parts for a low-pressure turbine rotor. The microstructural observations of the γ' phase precipitates on the cross sections of the blades were performed. The observations were followed by quantitative metallography evaluation, and finally, a comparison of the precipitates between one blade with the conventionally applied ceramic core and one with the core covered layer contained a surface modifier (5% of CoAl2O4) was made.
    Źródło:
    Archives of Metallurgy and Materials; 2017, 62, 2A; 595-601
    1733-3490
    Pojawia się w:
    Archives of Metallurgy and Materials
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Influence of Modification and Casting Technology on Structure of IN-713C Superalloy Castings
    Autorzy:
    Binczyk, F.
    Cwajna, J.
    Gradoń, P.
    Mańka, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/381572.pdf
    Data publikacji:
    2016
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    innovative casting materials
    innovative casting technologies
    nickel alloy IN-713C
    modification
    cobalt aluminate
    macrostructure
    innowacyjne materiały odlewnicze
    innowacyjne technologie odlewnicze
    stop niklu
    modyfikacja
    kobalt
    makrostruktura
    Opis:
    The paper presents the results concerning impact of modification (volume and surface techniques), pouring temperature and mould temperature on stereological parameters of macrostructure in IN713C castings made using post-production scrap. The ability to adjust the grain size is one of the main issues in the manufacturing of different nickel superalloy castings used in aircraft engines. By increasing the grain size one can increase the mechanical properties, like diffusion creep resistance, in higher temperatures. The fine grained castings. on the other hand, have higher mechanical properties in lower temperatures and higher resistance to thermal fatigue. The test moulds used in this study, supplied by Pratt and Whitney Rzeszow, are ordinarily used to cast the samples for tensile stress testing. Volume modification was carried out using the patented filter containing cobalt aluminate. The macrostructure was described using the number of grains per mm2, mean grain surface area and shape index. Obtained results show strong relationship between the modification technique, pouring temperature and grain size. There was no significant impact of mould temperature on macrostructure.
    Źródło:
    Archives of Foundry Engineering; 2016, 16, 3; 11-14
    1897-3310
    2299-2944
    Pojawia się w:
    Archives of Foundry Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Evaluation of Casting Shrinkage and Liquid Metal Fluidity of IN-713C Alloy
    Autorzy:
    Binczyk, F.
    Cieśla, M.
    Gradoń, P.
    Findziński, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/380184.pdf
    Data publikacji:
    2014
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    fluidity
    castability
    spiral test
    pouring temperature
    IN713C
    superalloy
    silumin
    płynność
    lejność
    temperatura odlewania
    nadstop
    Opis:
    This paper presents the results of measurements of liquid metal fluidity and linear shrinkage of nickel alloy IN-713C in vacuum induction melting furnace Balzers VSG-2. Because of limited volume of the furnace chamber special models for technological trials were fluidity of hypoeutectic silumin, however in case of nickel superalloy the mould cavity was completely filled in each test because of high required pouring temperature. Positive results were obtained from the modified spiral test for all alloys used in the research. Relationship between the linear shrinkage for the test rod and a specific indicator of contraction defined on a spiral was observed.
    Źródło:
    Archives of Foundry Engineering; 2014, 14, 1; 9-12
    1897-3310
    2299-2944
    Pojawia się w:
    Archives of Foundry Engineering
    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 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 1-11 z 11

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