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    Wyświetlanie 1-5 z 5
    Tytuł:
    The influence of remelting on the properties of AlSi6Cu4 alloy modified by antimony
    Autorzy:
    Medlen, D.
    Bolibruchova, D.
    Powiązania:
    https://bibliotekanauki.pl/articles/382439.pdf
    Data publikacji:
    2012
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    przetapianie
    właściwości mechaniczne
    metalografia
    modyfikacja
    antymon
    zawartość gazu
    remelting
    mechanical properties
    metallography
    antimony
    gas content
    Opis:
    The paper deals with the problem of multiple remelting influence on AlSi6Cu4 alloy modified by antimony on chosen mechanical characteristics, microstructure and gas content. This foundry alloy is used mostly in automotive industry. Foundry Aluminum-Silicon alloys are also used in number of industrial weight sensitive applications because of their low weight and very good castability and good mechanical properties. Modifiers are usually added to molten aluminum-silicon alloys to refine the eutectic phase particle shape and improve the mechanical properties of the final cast products and Al-Si alloys cast properties.
    Źródło:
    Archives of Foundry Engineering; 2012, 12, 1; 81-86
    1897-3310
    2299-2944
    Pojawia się w:
    Archives of Foundry Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Application of Natural and Artificial Ageing on Multiply Remelted AlSi9Cu3 Alloy
    Autorzy:
    Matejka, M.
    Bolibruchova, D.
    Powiązania:
    https://bibliotekanauki.pl/articles/382708.pdf
    Data publikacji:
    2019
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    remelting
    Fe phases
    artificial ageing
    natural ageing
    eutectic silicon
    przetapianie
    fazy Fe
    sztuczne starzenie
    naturalne starzenie
    krzem eutektyczny
    Opis:
    This article focuses on the study of the influence of remelting and subsequent natural and artificial ageing on the structure of recycled AlSi9Cu3 alloy with increased iron content. The assessed changes in eutectic silicon and iron-based intermetallic phases were carried out using optical and scanning electron microscopy. The degradation of the eutectic silicon morphology due to remelting occurred only at the highest numbers of remelting. The effect of remelting the investigated alloy, which is accompanied by a gradual increase in wt. % Fe, began to manifest significantly through a change in the length of the ferric phases after the fourth remelting. As expected, the artificial ageing process has proven to be more effective than natural ageing. It has led to a change in the eutectic silicon morphology and has been beneficial in reducing the lengths of adverse ferric phases. The use of alloys with higher numbers of remelting, or with greater “contamination”, for the manufacture of shape-challenging castings is possible when using a suitable method of eliminating the negative factors of the remelting process. The results of our investigation show a suitable method of the above elimination the application of heat treatment T5 – via artificial ageing.
    Źródło:
    Archives of Foundry Engineering; 2019, 2; 60-66
    1897-3310
    2299-2944
    Pojawia się w:
    Archives of Foundry Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Influence of Remelting AlSi9Cu3 Alloy with Higher Iron Content on Mechanical Properties
    Autorzy:
    Matejka, M.
    Bolibruchova, D.
    Powiązania:
    https://bibliotekanauki.pl/articles/380785.pdf
    Data publikacji:
    2018
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    alloy Al-Si-Cu
    remelting
    mechanical properties
    heat treatment
    stop Al-Si-Cu
    przetopienie
    właściwości mechaniczne
    obróbka cieplna
    Opis:
    The paper deals with influence of multiple remelting on AlSi9Cu3 alloy with higher iron content on chosen mechanical properties. Multiple remelting may in various ways influence mechanical, foundry properties, gas saturation, shrinkage cavity, fluidity etc. of alloy. Higher presence of iron in Al-Si cast alloys is common problem mainly in secondary (recycled) aluminium alloys. In Al-Si alloy the iron is the most common impurity and with presence of other elements in alloy creates the intermetallic compounds, which decreases mechanical properties. Iron in the used alloy was increased to about 1.4 wt. %, so that the influence of increased iron content can be investigated. In the paper, the effect of multiple remelting is evaluated with respect to the resulting mechanical properties in cast state, after the heat treatment (T5) and after natural aging. From the obtained results it can be concluded that the multiple remelting leads to change of chemical composition and affect the mechanical properties.
    Źródło:
    Archives of Foundry Engineering; 2018, 18, 3; 25-30
    1897-3310
    2299-2944
    Pojawia się w:
    Archives of Foundry Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Crystallization of the Structural Components of Multiple Remelted AlSi9Cu3 Alloy
    Autorzy:
    Matejka, M.
    Bolibruchova, D.
    Kuriš, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/1837683.pdf
    Data publikacji:
    2021
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    Al-Si-Cu
    remelting
    returnable material
    structural components
    scanning electron microscope
    Opis:
    At present, Al-Si-Cu based alloys (with a typical representative AlSi9Cu3 alloy) represent more than half of the castings used in various industries (automotive, aerospace and electrical engineering). These are most often sub-eutectic (exceptionally eutectic) alloys with a content of 6 to 13 wt. % Si and 1 to 5 wt. % Cu. The aim of the paper is to point out the importance of the evaluation of input raw materials that determines the overall properties of the casting and the costs invested in its production. A negative impact on performance can be expected when using an alloy made up of a high proportion of recycled material, despite its economic benefits. Experimental alloys were evaluated based on the results of crystallization process and a combination of scanning electron microscopy (SEM), energy dispersive X-ray analysis (EDX), and deep etching. The effect of remelting and increasing the remelted returnable material in the batch was manifested especially in the crystallization of iron-rich phases. The negative effect of remelting on the structural components was manifested after the fourth remelting. Gradual increase of remelted returnable material in the batch causes harmful changes in the crystallization process.
    Źródło:
    Archives of Foundry Engineering; 2021, 21, 2; 41-45
    1897-3310
    2299-2944
    Pojawia się w:
    Archives of Foundry Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Study of AlSi9Cu3 Alloy Crystallization Process with Increased Iron Content at Different Number of Remelts
    Autorzy:
    Matejka, M.
    Bolibruchova, D.
    Kasińska, J.
    Kuriš, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/380082.pdf
    Data publikacji:
    2020
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    Al-Si-Cu
    remelting
    thermal analysis
    structural analysis
    przetapianie
    analiza termiczna
    analiza strukturalna
    Opis:
    Monitoring the solidification process is of great importance for understanding the quality of the melt, for controlling it, and for predicting the true properties of the alloy. Solidification is accompanied by the development of heat, the magnitude of which depends on the different phases occurring during solidification. Thermal analysis is now an important part of and tool for quality control, especially when using secondary aluminium alloys in the automotive industry. The effect of remelting on the change of crystallization of individual structural components of experimental AlSi9Cu3 alloy was determined by evaluation of cooling curves and their first derivatives. Structural analysis was evaluated using a scanning electron microscope. The effect of remelting was manifested especially in nucleation of phases rich in iron and copper. An increasing number of remelts had a negative effect after the fourth remelting, when harmful iron phases appeared in the structure in much larger dimensions.
    Źródło:
    Archives of Foundry Engineering; 2020, 20, 1; 79-83
    1897-3310
    2299-2944
    Pojawia się w:
    Archives of Foundry Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
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