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    Wyświetlanie 1-3 z 3
    Tytuł:
    Control of the CET Localization in Continuously Cast Copper and Copper Alloys’ Ingots
    Autorzy:
    Kwapisiński, Piotr
    Wołczyński, Waldemar
    Powiązania:
    https://bibliotekanauki.pl/articles/27314164.pdf
    Data publikacji:
    2023
    Wydawca:
    Polska Akademia Nauk. Czasopisma i Monografie PAN
    Tematy:
    alloy ingots
    copper alloys
    CET
    Liquidus isotherm velocity
    single crystal’s core
    wlewki
    stopy miedzi
    izoterma Liquidusa
    rdzeń monokryształu
    Opis:
    A brief description of the innovative mathematical method for the prediction of CET – localization in solidifying copper and copper alloys’ ingots is presented. The method is to be preceded by the numerical simulation of both temperature field and thermal gradient filed. All typical structural zones were revealed within the copper and copper alloys’ massive ingots or rods manufactured by continuous casting. The role of thermal gradient direction for the single crystal core formation has been enlightened. The definition for the index describing proportion between volume fraction of the columnar structure and volume fraction of the equiaxed structure has been formulated by means of the interpretation of some features of the liquidus isotherm velocity course. An attempt has been undertaken to apply the developed mathematical method for the structural zones prediction in the rods solidifying under industrial conditions. An industrial application has been shown, that is, it was explained why the innovative rods should be assigned to the overhead conductors in the electric tractions.
    Źródło:
    Archives of Foundry Engineering; 2023, 23, 2; 91--99
    1897-3310
    2299-2944
    Pojawia się w:
    Archives of Foundry Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Mechanical properties and fracture analysis of AlCu4MgSi alloy ingots obtained by horizontal continuous casting
    Autorzy:
    Nuckowski, P. M.
    Wróbel, T.
    Powiązania:
    https://bibliotekanauki.pl/articles/352196.pdf
    Data publikacji:
    2019
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    AlCu4MgSi alloy
    horizontal continuous casting
    fracture analysis
    mechanical properties of ingots
    aluminum
    Opis:
    The article presents the results of research concerning AlCu4MgSi alloy ingots produced using horizontal continuous casting process under variable conditions of casting speed and cooling liquid flow through the crystallizer. The mechanical properties and structure of the obtained ingots were correlated with the process parameters. On the basis of the obtained results, it has been shown that depending on the cooling rate and the intensity of convection during solidification, significant differences in the mechanical properties and structure and of the ingots can occur. The research has shown that, as the casting speed and the flow rate of the cooling liquid increase, the hardness of the test samples decreases, while their elongation increases, which is related to the increase of the average grain size. Also, the morphology of the intermetallic phases precipitations lattice, as well as the centerline porosity and dendrite expansion, significantly affect the tensile strength and fracture mechanism of the tested ingots.
    Źródło:
    Archives of Metallurgy and Materials; 2019, 64, 1; 113-118
    1733-3490
    Pojawia się w:
    Archives of Metallurgy and Materials
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    The Properties of 7xxx Series Alloys Formed by Alloying Additions
    Autorzy:
    Kwak, Z.
    Rzadkosz, S.
    Garbacz-Klempka, A.
    Perek-Nowak, M.
    Krok, W.
    Powiązania:
    https://bibliotekanauki.pl/articles/382838.pdf
    Data publikacji:
    2015
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    variation of the properties
    quality of ingots
    Al-Zn-Mg-Cu alloy
    microstructure
    jakość wlewków
    stop Al-Zn-Mg-Cu
    mikrostruktura
    Opis:
    Currently there is a constant development in the field of aluminium alloys engineering. This results from, i.a., better understanding of the mechanisms that direct strengthening of these alloys and the role of microalloying. Now it is microalloying in aluminum alloys that is receiving a lot of attention. It affects substantially the macro- and microstructure and kinetics of phase transformation influencing the properties during production and its exploitation. 7xxx series aluminum alloys, based on the Al-Zn-Mg-Cu system, are high-strength alloys, moreover, the presence of Zr and Sr further increases their strength and improves resistance to cracking. This study aims to present the changes of the properties, depending on the alloy chemical composition and the macro- and microstructure. Therefore, the characteristics in the field of hardness, tensile strength, yield strength and elongation are shown on selected examples. Observations were made on ingot samples obtained by semi-continuous casting, in the homogenized state. Samples were prepared from aluminum alloys in accordance with PN-EN 573-3: 2013. The advantage of Al-Zn-Mg-Cu alloys are undoubtedly good strength, Light-weight and resistance to corrosion. As widening of the already published studies it is sought to demonstrate the repeatability of the physical parameters in the whole volume of the sample.
    Źródło:
    Archives of Foundry Engineering; 2015, 15, 2; 59-64
    1897-3310
    2299-2944
    Pojawia się w:
    Archives of Foundry Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-3 z 3

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