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    Wyświetlanie 1-4 z 4
    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 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:
    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
      Wyświetlanie 1-4 z 4

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