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    Wyświetlanie 1-3 z 3
    Tytuł:
    Influence on the quality of secondary aluminum alloy casts by Mn addition
    Autorzy:
    Kuchariková, Lenka
    Tillová, Eva
    Mazur, Magdalena
    Herčko, Adrián
    Powiązania:
    https://bibliotekanauki.pl/articles/104160.pdf
    Data publikacji:
    2019
    Wydawca:
    Stowarzyszenie Menedżerów Jakości i Produkcji
    Tematy:
    intermetallic phases
    addition of Mn
    secondary aluminium alloys
    quality of cast
    wtórne stopy aluminium
    fazy międzymetaliczne
    dodatek Mn
    jakość odlewów
    Opis:
    The quality of aluminum casts is necessary in order to reach sufficient properties required for application. The decreasing in the properties of aluminum cast mainly related with microstructure, especially with size and morphology of second phases. One of such second phases in aluminum alloys are the β-phases. These phases are unwonted mainly because of the decreasing of mechanical properties. The contribution is deal with influence of addition of Mn to affecting the formation of βphases in the AlSi7Mg0.3 and AlSi7Mg0.6 cast alloys. These materials are used for application especially automotive industry. The results shows, that addition of Mn is not sufficient for affecting of formation of the Fe-rich phases in AlSi7Mg0.6 cat alloys, but in the AlSi7Mg0.3 this addition lead to changes in formation of Fe-rich intermetallic phases.
    Źródło:
    Quality Production Improvement - QPI; 2019, 1, 1; 319-325
    2657-8603
    Pojawia się w:
    Quality Production Improvement - QPI
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    The quality assurance of cast and wrought aero jet engine components made from Ni-base superalloys with using of quantitative metallography methods and alloys lifetime prediction
    Autorzy:
    Belan, Juraj
    Kuchariková, Lenka
    Mazur, Magdalena
    Tillová, Eva
    Hanusová, Patrícia
    Powiązania:
    https://bibliotekanauki.pl/articles/104037.pdf
    Data publikacji:
    2019
    Wydawca:
    Stowarzyszenie Menedżerów Jakości i Produkcji
    Tematy:
    quality assurance
    cast Ni-base superalloys
    wrought Ni-base superalloys
    turbine blades
    turbine disc
    quantitative metallography
    zapewnienie jakości
    superstopy na bazie Ni
    łopatki turbin
    tarcza turbiny
    metalografia ilościowa
    Opis:
    The Ni-base superalloys are used in the aircraft industry for the production of aero engine most stressed parts, turbine blades or turbine discs. Quality of aero jet engine components has a significant influence on the overall lifetime of a jet engine as itself as well as the whole airplane. From this reason a dendrite arm spacing, grain size, morphology, number and value of γ' - phase are very important structural characteristics for blade or discs lifetime prediction. The methods of quantitative metallography are very often used for evaluation of structural characteristics mentioned above. The high-temperature effect on structural characteristics and application of quantitative methods evaluation are presented in this paper. The two different groups of Ni-base alloys have been used as experimental material: cast alloys ZhS6K and IN713LC, which are used for small turbine blades production and wrought alloys EI 698VD and EI 929, which are used for turbine disc production. Selected alloys have been evaluated in the starting stage and after applied heattreatment at 850°C for 24 hrs. This applied heat-treatment causes structural changes in all alloys groups. In cast alloy dendritic structure is degraded and gamma prime average size has grown what has a negative influence on turbine blade creep rupture life. Wrought alloys show partially grain boundary melting and grain size changed due to recrystallization what causes mechanical properties decreasing - ultimate tensile strength mainly.
    Źródło:
    Quality Production Improvement - QPI; 2019, 1, 1; 222-229
    2657-8603
    Pojawia się w:
    Quality Production Improvement - QPI
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Advantages of colour etching in quality control of recycled Al-Si cast alloys
    Autorzy:
    Tillová, Eva
    Kuchariková, Lenka
    Chalupová, Mária
    Belan, Juraj
    Vaško, Alan
    Herčko, Adrián
    Powiązania:
    https://bibliotekanauki.pl/articles/104005.pdf
    Data publikacji:
    2019
    Wydawca:
    Stowarzyszenie Menedżerów Jakości i Produkcji
    Tematy:
    Al-Si cast alloys
    colour metallography
    microstructure
    quality control
    stopy odlewane Al-Si
    mikrostruktura
    kontrola jakości
    metalografia kolorowa
    Opis:
    Colour Metallography is a set of light metallographic microscopy methodologies that utilize phase colour contrast as a source of new structure information compared to conventional techniques. In many cases, colour contrast can be induced where no identifiable phase contrast is obtained by conventional techniques. With the help of colour contrast, we gain new information on the structure of Al-Si alloys, especially intermetallic phases, in which the benefits of its use in casting quality control are of benefit. Blue-yellow contrast is definitely more pronounced than dark grey or light grey contrast. There is no substantial reproducible colour reproduction, since it is irrelevant whether the two phases are distinguished by blue-yellow or green-ocher contrast. When using the colour contrast, the structural components differ not only according to their microscopic appearance, but also based on the knowledge of the chemical composition of alloys, interactions between structural components, knowledge of the possible influence of Al-alloys structure (e.g. refining, modifications, heat treatment). Colour contrast in quality control of Al-Si alloys was applied to AlSiMg cast alloy (AlSi7Mg0.3; AlSi7MgTi; AlSi10MgMn; etc.).
    Źródło:
    Quality Production Improvement - QPI; 2019, 1, 1; 296-303
    2657-8603
    Pojawia się w:
    Quality Production Improvement - QPI
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-3 z 3

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