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    Wyświetlanie 1-14 z 14
    Tytuł:
    Impact of surface and volume modification of nickel superalloys IN-713C and MAR-247 on high temperature creep resistance
    Autorzy:
    Cieśla, M.
    Binczyk, F.
    Mańka, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/380339.pdf
    Data publikacji:
    2012
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    nadstop niklu
    makrostruktura
    właściwości mechaniczne
    pełzanie
    nickel superalloy
    macrostructure
    modification
    mechanical properties
    creep
    Opis:
    Impact of surface and volume modification and double filtration during pouring the moulds on basic mechanical properties and creep resistance of nickel superalloys IN-713C and MAR-247 in conditions of accelerated creep of castings made of post-production scrap of these alloys is evaluated in this paper. The conditions of initiation and propagation of cracks in the specimens were analysed with consideration of stereological properties of material macro- and microstructure. It has been proven that in the conditions of high-temperature creep at 980 C and at stress [...] = 150 MPa, creep resistance of superalloy MAR-247 is more than 10 times higher than the creep resistance of IN-713C alloy. In case of IN-713C alloy, the creep resistance negligibly depends on macrograin sizes. But, the macrograin size considerably affects the time to failure of specimens made of alloy MAR-247. Creep resistance of specimens made of coarse grain material was 20% higher than the resistance of fine grain materials.
    Źródło:
    Archives of Foundry Engineering; 2012, 12, 4; 17-24
    1897-3310
    2299-2944
    Pojawia się w:
    Archives of Foundry Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    The influence of impurities in feed ingots on the quality of castings made from nickel superalloy IN-713C
    Autorzy:
    Binczyk, F.
    Cwajna, J.
    Sozańska, M.
    Gradoń, P.
    Powiązania:
    https://bibliotekanauki.pl/articles/381414.pdf
    Data publikacji:
    2013
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    ATD
    superalloy
    feed ingot
    master heat
    solidification
    non-metallic inclusion
    nadstop
    wlewek
    krzepnięcie
    wtrącenie niemetaliczne
    Opis:
    The paper presents the results of research on the impact of impurities in the feed ingots (master heat) on the precipitation of impurities in the ATD thermal analysis probe castings. This impurities occur mostly inside shrinkage cavities and in interdendritic space. Additionally, insufficient filtration of liquid alloy during pouring promotes the transfer of impurities into the casting. The technology of melting superalloys in vacuum furnace prevents the removal of slag from the surface of molten metal. Because of that, the effective method of quality assessment of feed ingots in order to evaluate the existence of impurities is needed. The effectiveness of ATD analysis in evaluation of purity of feed ingots was researched. In addition the similarities of non-metallic inclusions in feed ingots and in castings were observed.
    Źródło:
    Archives of Foundry Engineering; 2013, 13, 4; 5-8
    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:
    Mechanical properties and creep resistance of nickel alloys after complex modification and double filtration
    Autorzy:
    Binczyk, F.
    Gradoń, P.
    Mańka, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/382498.pdf
    Data publikacji:
    2012
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    nadstop niklu
    makrostruktura
    modyfikacja
    filtracja
    twardość
    odporność na pełzanie
    nickel superalloy
    macrostructure
    modification
    filtration
    hardness
    creep behaviour
    Opis:
    The paper presents the results of studies to determine the effect of complex surface and bulk modification and double filtration during mould pouring on the stereological parameters of macrostructure and mechanical properties of castings made from the post-production waste IN-713C and the MAR-247 nickel alloys. The evaluation covered the number of grains per 1mm2 of the sample surface area, the average area of grains and the shape index, hardness HB, tensile strength and resistance to high temperature creep. The results indicate the possibility of controlling the stereological parameters of macrostructure through application of several variants of the modification, controlling in this way also different low- and high-temperature properties. The positive effect of double filtration of the alloy during mould pouring on the metallurgical quality and mechanical properties of castings has also been emphasized.
    Źródło:
    Archives of Foundry Engineering; 2012, 12, 2; 5-8
    1897-3310
    2299-2944
    Pojawia się w:
    Archives of Foundry Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Degradation of Creep Resistant Ni - alloy During Aging at Elevated Temperature Part II: Structure Investigations
    Autorzy:
    Kaczorowski, M.
    Skoczylas, P.
    Krzyńska, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/381511.pdf
    Data publikacji:
    2015
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    Ni-base superalloy
    structure investigations
    SEM observation
    TEM observation
    nadstop niklu
    badanie struktury
    obserwacja SEM
    obserwacja TEM
    Opis:
    The results of structure observations of Ni base superalloy subjected to long-term influence of high pressure hydrogen atmosphere at 750K and 850K are presented. The structure investigation were carried out using conventional light-, scanning- (SEM) and transmission electron microscopy (TEM). The results presented here are supplementary to the mechanical studies given in part I of this investigations. The results of study concerning mechanical properties degradation and structure observations show that the differences in mechanical properties of alloy subjected different temperature are caused by more advanced processes of structure degradation during long-term aging at 850K, compare to that at 750K. Higher service temperature leads to formation of large precipitates of δ phase. The nucleation and growth of needle- and/or plate-like, relative large delta precipitates proceed probably at expense strengthening γ" phases. Moreover, it can't be excluded that the least stable γ" phase is replaced with more stable γ' precipitates. TEM observations have disclosed differences in dislocation structure of alloy aged at 750K and 850K. The dislocation observed in alloy subjected to 750K are were seldom observed only, while in that serviced at high stress and 850K dislocation array and dislocation cell structure was typical.
    Źródło:
    Archives of Foundry Engineering; 2015, 15, 4; 45-50
    1897-3310
    2299-2944
    Pojawia się w:
    Archives of Foundry Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Analysis of solidification parameters and macrostructure of IN-713C castings after complex modification
    Autorzy:
    Binczyk, F.
    Gradoń, P.
    Powiązania:
    https://bibliotekanauki.pl/articles/379884.pdf
    Data publikacji:
    2013
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    nickel alloy
    superalloy
    modification
    inoculation
    solidification
    thermal analysis
    macrostructure
    stop niklu
    nadstop
    modyfikacja
    inokulacja
    krzepnięcie
    analiza termiczna
    makrostruktura
    Opis:
    The paper presents a research results concerning impact of volume modification (ceramic filter containning cobalt aluminate and hafnium powder) and simultaneous surface and volume modification on solidification and stereological parameters of macrostructure of castings made from post-production scrap of nickel superalloy IN-713C. Research included investigation of the influence of chemical composition on the temperature Tliq i Tsol and evaluation of following macrostructure parameters: the number of grains per mm2, average grain area and shape coefficient. Results indicate high influence of carbon content on Tliq. Macrostructure of sample castings indicate positive effect of surface and volume modification, however impact of surface modification is more pronounced.
    Źródło:
    Archives of Foundry Engineering; 2013, 13, 3; 5-8
    1897-3310
    2299-2944
    Pojawia się w:
    Archives of Foundry Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    The control of solidification kinetics of the vacuum-cast thin-wall nickel-based superalloys by changing the geometrical characteristics of the ceramic mold
    Autorzy:
    Cygan, R.
    Szeliga, D.
    Rokicki, P.
    Sieniawski, J.
    Suchy, J. S.
    Powiązania:
    https://bibliotekanauki.pl/articles/381982.pdf
    Data publikacji:
    2013
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    nickel based superalloy
    ceramic mold
    thin walled casting
    investment casting
    nadstop niklu
    forma ceramiczna
    odlewanie cienkościenne
    odlewanie precyzyjne
    Opis:
    This paper provides an analysis of experimental research and results of investment casting process. Temperature field in a ceramic mold is one of the problems during numerical simulation. Reducing the costs of production in precision casting involves the reduction of scraps, which is one of the fundamental problems of the foundry industry. Reducing these costs is associated with optimization of precision casting technology of aircraft engines critical parts, including control of the solidification front in thin-walled castings of nickel super alloys cast in a vacuum. It is achieved by changing the geometrical characteristics of the ceramic mold. The results of the tests were used to optimize the industrial production of aircraft components in Precision Foundry of WSK Rzeszów. Temperature distribution gained in the conducted tests allowed verification and optimization of computer simulations.
    Źródło:
    Archives of Foundry Engineering; 2013, 13, 4; 21-28
    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:
    Durability of MAR-247 and IN-713C Nickel Superalloys under Cyclic Creep Conditions
    Autorzy:
    Cieśla, M.
    Binczyk, F.
    Junak, G.
    Mańka, M.
    Gradoń, P.
    Powiązania:
    https://bibliotekanauki.pl/articles/380030.pdf
    Data publikacji:
    2015
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    nickel superalloy
    macrostructure modification
    heat treatment
    low-cycle fatigue
    cyclic creep
    nadstop niklu
    modyfikacja makrostruktury
    obróbka cieplna
    zmęczenie niskocyklowe
    pełzanie cykliczne
    Opis:
    Paper presents the assessment of impact of heat treatment on durability in low-cycle fatigue conditions (under constant load) in castings made using post-production scrap of MAR-247 and IN-713C superalloys. Castings were obtained using modification and filtration methods. Additionally, casting made of MAR-247 were subjected to heat treatment consisting of solution treatment and subsequent aging. During low-cycle fatigue test the cyclic creep process were observed. It was demonstrated that the fine-grained samples have significantly higher durability in test conditions and , at the same time, lower values of plastic deformation to rupture Δ□pl. It has been also proven that durability of fine-grained MAR-247 samples can be further raised by about 60% using aforementioned heat treatment.
    Źródło:
    Archives of Foundry Engineering; 2015, 15, 4; 17-20
    1897-3310
    2299-2944
    Pojawia się w:
    Archives of Foundry Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Evaluation of metallurgical quality of master heat IN-713C nickel alloy ingots
    Autorzy:
    Binczyk, F.
    Cwajna, J.
    Roskosz, S.
    Gradoń, P.
    Powiązania:
    https://bibliotekanauki.pl/articles/380351.pdf
    Data publikacji:
    2012
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    analiza termiczna (ATD)
    nadstop niklu
    krzepnięcie odlewu
    wtrącenia niemetaliczne
    ATD thermal analysis
    nickel superalloy
    master heat ingot
    solidification
    non-metallic inclusions
    Opis:
    The paper presents the results of evaluation of the metallurgical quality of master heat ingots and of the identification of non-metallic inclusions (oxides of Al., Zr, Hf, Cr, etc.), which have been found in the shrinkage cavities formed in these ingots. The inclusions penetrate into the liquid alloy, and on pouring of mould are transferred to the casting, especially when the filtering system is not sufficiently effective. The specific nature of the melting process of nickel and cobalt alloys, carried out in vacuum induction furnaces, excludes the possibility of alloy refining and slag removal from the melt surface. Therefore, to improve the quality of castings (parts of aircraft engines), it is so important to evaluate the quality of ingots before charging them into the crucible of an induction furnace. It has been proved that one of the methods for rapid quality evaluation is an ATD analysis of the sample solidification process, where samples are taken from different areas of the master heat ingot. The evaluation is based on a set of parameters plotted on the graph of the dT/dt derivative curve during the last stage of the solidification process in a range from TEut to Tsol.
    Źródło:
    Archives of Foundry Engineering; 2012, 12, 4; 5-10
    1897-3310
    2299-2944
    Pojawia się w:
    Archives of Foundry Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Evaluation of Heat Capacity and Resistance to Cyclic Oxidation of Nickel Superalloys
    Autorzy:
    Przeliorz, R.
    Binczyk, F.
    Gradoń, P.
    Góral, M.
    Mikuszewski, T.
    Powiązania:
    https://bibliotekanauki.pl/articles/381534.pdf
    Data publikacji:
    2014
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    foundry technology
    nickel superalloys
    heat resistance
    DSC calorimeter
    heat capacity
    technologie odlewnicze
    nadstop niklu
    odporność na ciepło
    DSC kalorymetru
    pojemność cieplna
    Opis:
    Paper presents the results of evaluation of heat resistance and specific heat capacity of MAR-M-200, MAR-M-247 and Rene 80 nickel superalloys. Heat resistance was evaluated using cyclic method. Every cycle included heating in 1100°C for 23 hours and cooling for 1hour in air. Microstructure of the scale was observed using electron microscope. Specific heat capacity was measured using DSC calorimeter. It was found that under conditions of cyclically changing temperature alloy MAR-M-247 exhibits highest heat resistance. Formed oxide scale is heterophasic mixture of alloying elements, under which an internal oxidation zone was present. MAR-M-200 alloy has higher specific heat capacity compared to MAR-M-247. For tested alloys in the temperature range from 550°C to 800°C precipitation processes (γ′, γ′′) are probably occurring, resulting in a sudden increase in the observed heat capacity.
    Źródło:
    Archives of Foundry Engineering; 2014, 14, 3; 67-70
    1897-3310
    2299-2944
    Pojawia się w:
    Archives of Foundry Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Grain size reduction in the 713C nickel superalloy as a result of heat treatment
    Autorzy:
    Lachowicz, M. B.
    Faryna, M.
    Podrez-Radziszewska, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/379754.pdf
    Data publikacji:
    2011
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    heat treatment
    metallographic test
    superalloy 713C
    Ni3Al
    NbC
    EBSD method
    obróbka cieplna
    badanie metalograficzne
    nadstop 713C
    metoda EBSD
    Opis:
    The paper presents metallographic test results for the 713C nickel superalloy after heat treatment and crystallographic orientation analysis performed with the EBSD method. The 713C alloy was subjected to annealing in the temperature of 950 ºC for 30 hours followed by aircooling. As a result of the applied heat treatment the local grain size reduction in the alloy was observed. It has been found that in the primary grains the new subgrains of different crystallographic orientation are created. Between the new grains and the primary grains the boundaries of high angle appear. Orientation change in the micro-areas is closely related to the carbides rebuilding and volume diffusion of elements dissolved in the γ - γ’ alloy matrix and the (NbTi)C carbides.
    Źródło:
    Archives of Foundry Engineering; 2011, 11, 2 spec.; 143-148
    1897-3310
    2299-2944
    Pojawia się w:
    Archives of Foundry Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Application of DSC Method in Studies on Phase Transitions of Ni Superalloys
    Autorzy:
    Przeliorz, R.
    Piątkowski, J.
    Powiązania:
    https://bibliotekanauki.pl/articles/382295.pdf
    Data publikacji:
    2017
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    innovative material
    innovative technology
    nickel superalloy
    differential scanning calorimetry
    specific heat
    innowacyjny materiał
    technologia innowacyjna
    nadstop niklu
    skaningowa kalorymetria różnicowa
    ciepło właściwe
    Opis:
    The paper presents results of calorimetric studies of foundry nickel superalloys: IN100, IN713C, Mar-M247 and ŻS6U. Particular attention was paid to determination of phase transitions temperatures during heating and cooling. The samples were heated to a temperature of 1500°C with a rate of 10°C min–1 and then held at this temperature for 5 min. After a complete melting, the samples were cooled with the same rate. Argon with a purity of 99.99% constituted the protective atmosphere. The sample was placed in an alundum crucible with a capacity of 0.45 cm3. Temperature and heat calibration was carried out based on the melting point of high-purity Ni. The tests were carried out by the differential scanning calorimetry (DSC) using a Multi HTC high-temperature calorimeter from Setaram. Based on the DSC curves, the following temperatures were determined: solidus and liquidus, dissolution and precipitation of the γ’ phase, MC carbides and melting of the γ’/γ eutectic. In the temperature range of 100-1100°C, specific heat capacity of the investigated superalloys was determined. It was found that the IN713C and IN100 alloys exhibit a higher specific heat while compared to the Mar-M247 and ŻS6U alloys.
    Źródło:
    Archives of Foundry Engineering; 2017, 17, 4; 133-136
    1897-3310
    2299-2944
    Pojawia się w:
    Archives of Foundry Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Ceramic filters for bulk inoculation of nickel alloy castings
    Autorzy:
    Binczyk, F.
    Śleziona, J.
    Gradoń, P.
    Powiązania:
    https://bibliotekanauki.pl/articles/379709.pdf
    Data publikacji:
    2011
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    nickel superalloy
    ceramic filter
    CoAl2O4 inoculant
    compression strength
    nadstop niklu
    filtr ceramiczny
    inokulant CoAl2O4
    wytrzymałość na ściskanie
    Opis:
    The work includes the results of research on production technology of ceramic filters which, besides the traditional filtering function, play also the role of an inoculant modifying the macrostructure of cast nickel alloys. To play this additional role, filters should demonstrate sufficient compression strength and ensure proper flow rate of liquid alloy. The role of an inoculant is played by cobalt aluminate introduced to the composition of external coating in an amount from 5 to 10 wt.%. The required compression strength (over 1MPa) is provided by the supporting layers, deposited on the preform, which is a polyurethane foam. Based on a two-level fractional experiment 24-1, the significance of an impact of various technological parameters (independent variables) on selected functional parameters of the ready filters was determined. Important effect of the number of the supporting layers and sintering temperature of filters after evaporation of polyurethane foam was stated.
    Źródło:
    Archives of Foundry Engineering; 2011, 11, 3 spec.; 29-32
    1897-3310
    2299-2944
    Pojawia się w:
    Archives of Foundry Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-14 z 14

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