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Wyszukujesz frazę "A356" wg kryterium: Temat

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    Wyświetlanie 1-4 z 4
    Tytuł:
    Effect of Sr and Ti Addition on the Corrosion Behaviour of Al-7Si-0.3Mg Alloy
    Autorzy:
    Uludag, M.
    Kocabas, M.
    Dispinar, D.
    Cetin, R.
    Consever, N.
    Powiązania:
    https://bibliotekanauki.pl/articles/381519.pdf
    Data publikacji:
    2017
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    A356 alloy
    bifilm index
    grain refinement
    modification
    electrochemical corrosion
    stop A356
    ziarna
    modyfikacja
    korozja elektrochemiczna
    Opis:
    In the present study, the corrosion behaviour of A356 (Al-7Si-0.3Mg) alloy in 3.5% NaCl solution has been evaluated using cyclic/potentiodynamic polarization tests. The alloy was provided in the unmodified form and it was then modified with AlTi5B1 for grain refinement and with AlSr15 for Si modifications. These modifications yield to better mechanical properties. Tensile tests were performed. In addition, bifilm index and SDAS values were calculated and microstructure of the samples was investigated. As a result of the corrosion test, the Ecorr values for all conditions were determined approximately equal, and the samples were pitted rapidly. The degassing of the melt decreased the bifilm index (i.e. higher melt quality) and thereby the corrosion resistance was increased. The lowest corrosion rate was founded at degassing and as-received condition (3.9x10-3 mm/year). However, additive elements do not show the effect which degassing process shows.
    Źródło:
    Archives of Foundry Engineering; 2017, 17, 2; 125-130
    1897-3310
    2299-2944
    Pojawia się w:
    Archives of Foundry Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Role of Metal Quality and Porosity Formation in Low Pressure Die Casting of A356: Experimental Observations
    Autorzy:
    Gursoy, O.
    Nordmak, A.
    Syversten, F.
    Colak, M.
    Tur, K.
    Dispinar, D.
    Powiązania:
    https://bibliotekanauki.pl/articles/1837851.pdf
    Data publikacji:
    2021
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    die casting
    alloy A356
    solidification
    LPDC
    aluminium
    quality of alloy
    bifilm
    porosity
    odlewanie ciśnieniowe
    stop A356
    krzepnięcie
    właściwości stopu
    porowatość
    Opis:
    Porosity is one of the major problems in casting operations and there are several discussions in the literature about the porosity formation in aluminum castings. Bifilms are the defects that are introduced into the melt by turbulence. They can be detected with reduced pressure test and presented numerically by measuring bifilm index. The measure of bifilm index is the sum of total oxide length given in millimeters from the cross-section of reduced pressure test sample solidified under 0.01 MPa. In this work, low pressure die casting (LPDC) unit was built in an attempt to enhance the producibility rate. The unit consists of a pump housing that was placed inside the melt in the melting furnace where the pressure was applied instead of the whole melt surface. It was observed that the melt quality of A356 alloy was deteriorated over time which had led to higher porosity. This was attributed to the increased oxide thickness of the bifilm by the consumption of air in between the folded oxides. A relationship was found between bifilm index and pore formation.
    Źródło:
    Archives of Foundry Engineering; 2021, 21, 1; 5-10
    1897-3310
    2299-2944
    Pojawia się w:
    Archives of Foundry Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Role of Metal Quality and Porosity Formation in Low Pressure Die Casting of A356: Experimental Observations
    Autorzy:
    Gursoy, O.
    Nordmak, A.
    Syversten, F.
    Colak, M.
    Tur, K.
    Dispinar, D.
    Powiązania:
    https://bibliotekanauki.pl/articles/1837813.pdf
    Data publikacji:
    2021
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    die casting
    alloy A356
    solidification
    LPDC
    aluminium
    quality of alloy
    bifilm
    porosity
    odlewanie ciśnieniowe
    stop A356
    krzepnięcie
    właściwości stopu
    porowatość
    Opis:
    Porosity is one of the major problems in casting operations and there are several discussions in the literature about the porosity formation in aluminum castings. Bifilms are the defects that are introduced into the melt by turbulence. They can be detected with reduced pressure test and presented numerically by measuring bifilm index. The measure of bifilm index is the sum of total oxide length given in millimeters from the cross-section of reduced pressure test sample solidified under 0.01 MPa. In this work, low pressure die casting (LPDC) unit was built in an attempt to enhance the producibility rate. The unit consists of a pump housing that was placed inside the melt in the melting furnace where the pressure was applied instead of the whole melt surface. It was observed that the melt quality of A356 alloy was deteriorated over time which had led to higher porosity. This was attributed to the increased oxide thickness of the bifilm by the consumption of air in between the folded oxides. A relationship was found between bifilm index and pore formation.
    Źródło:
    Archives of Foundry Engineering; 2021, 21, 1; 5-10
    1897-3310
    2299-2944
    Pojawia się w:
    Archives of Foundry Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Evolution of Aluminium Melt Quality of A356 After Several Recycling
    Autorzy:
    Gursoy, O.
    Erzi, E.
    Tur, K.
    Dispinar, D.
    Powiązania:
    https://bibliotekanauki.pl/articles/1840918.pdf
    Data publikacji:
    2020
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    A356
    recycling
    melt quality
    reduce pressure test
    bifilm index
    recykling
    topnienie
    próba ciśnieniowa
    Opis:
    Recyclability is one of the great features of aluminium and its alloys. However, it has been typically considered that the secondary aluminium quality is low and bad. This is only because aluminium is so sensitive to turbulence. Uncontrolled transfer and handling of the liquid aluminium results in formation of double oxide defects known as bifilms. Bifilms are detrimental defects. They form porosity and deteriorate the properties. The detection and quantification of bifilms in liquid aluminium can be carried out by bifilm index measured in millimetres as an indication of melt cleanliness using Reduced Pressure Test (RPT). In this work, recycling efficiency and quality change of A356 alloy with various Ti additions have been investigated. The charge was recycled three times and change in bifilm index and bifilm number was evaluated. It was found that when high amount of Ti grain refiner was added, the melt quality was increased due to sedimentation of bifilms with Ti. When low amount of Ti is added, the melt quality was degraded.
    Źródło:
    Archives of Foundry Engineering; 2020, 20, 4; 61-66
    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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