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    Wyświetlanie 1-6 z 6
    Tytuł:
    Benefit Effect of Low Addition Yttrium on the Phase αMg and eutectic αMg+γ(Mg17Al12) in AZ91 Alloy
    Autorzy:
    Mikusek, D.
    Rapiejko, C.
    Andrzejczak, A.
    Pacyniak, T.
    Powiązania:
    https://bibliotekanauki.pl/articles/2049625.pdf
    Data publikacji:
    2021
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    magnesium alloy AZ91
    yttrium
    grain refining
    solidification process
    investment casting
    Opis:
    This paper presents results of a study of the effect of inoculation of yttrium on the microstructure of AZ91 alloy. The concentration of the inoculant was increased in samples in the range from 0.1% up to 0.6%. The influence of Y on the thermal effects resulting from the phase transformations occurring during the crystallisation at different inoculant concentrations were examined with the use of Derivative and Thermal Analysis (DTA). The microstructures of the samples were examined with the use of an optical microscope; and an image analysis with a statistical analysis were also carried out. Those analyses aimed at examining oh the effect of inoculation of the Y on the differences between the grain diameters of phase αMg and eutectic αMg+γ(Mg17Al12) in the prepared examined material as well as the average size of each type of grain by way of measuring their perimeters.
    Źródło:
    Archives of Metallurgy and Materials; 2021, 66, 1; 57-63
    1733-3490
    Pojawia się w:
    Archives of Metallurgy and Materials
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Effect of Gadolinium on the Microstructure of Magnesium Alloy AZ91
    Autorzy:
    Rapiejko, Cezary
    Mikusek, D.
    Just, P.
    Pacyniak, T.
    Powiązania:
    https://bibliotekanauki.pl/articles/1837784.pdf
    Data publikacji:
    2021
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    metallography
    solidification process
    magnesium alloys
    gadolinium
    DTA process
    metalografia
    proces krzepnięcia
    stopy magnezu
    gadolin
    proces DTA
    Opis:
    The paper presents the results of research related to the possibility of inoculation of the AZ91 magnesium alloy casted into ceramic moulds by gadolinium. Effects of gadolinium content (0.1–0.6 wt%) on microstructure of the AZ91 alloy under as-cast state were investigated. The influence of the inoculator on the formation of the microstructure investigated by means of the thermal and derivative analysis by analysing the thermal effects arising during the alloy crystallization resulting from the phases formed. The degree of fragmentation of the microstructure of the tested alloys was assessed by means of the light microscopy studies and an image analysis with statistical analysis was performed. Conducted analyses have aimed at examining on the effect of inoculation of the gadolinium on the differences between the grain diameters and average size of each type of grain by way of measuring their perimeters of all phases, preliminary αMg and eutectics αMg+γ(Mg17Al12) in the prepared examined material.
    Źródło:
    Archives of Foundry Engineering; 2021, 21, 1; 31-36
    1897-3310
    2299-2944
    Pojawia się w:
    Archives of Foundry Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Effect of Gadolinium on the Microstructure of Magnesium Alloy AZ91
    Autorzy:
    Rapiejko, C.
    Mikusek, D.
    Just, P.
    Pacyniak, T.
    Powiązania:
    https://bibliotekanauki.pl/articles/1837850.pdf
    Data publikacji:
    2021
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    metallography
    solidification process
    magnesium alloys
    gadolinium
    DTA process
    metalografia
    proces krzepnięcia
    stopy magnezu
    gadolin
    proces DTA
    Opis:
    The paper presents the results of research related to the possibility of inoculation of the AZ91 magnesium alloy casted into ceramic moulds by gadolinium. Effects of gadolinium content (0.1–0.6 wt%) on microstructure of the AZ91 alloy under as-cast state were investigated. The influence of the inoculator on the formation of the microstructure investigated by means of the thermal and derivative analysis by analysing the thermal effects arising during the alloy crystallization resulting from the phases formed. The degree of fragmentation of the microstructure of the tested alloys was assessed by means of the light microscopy studies and an image analysis with statistical analysis was performed. Conducted analyses have aimed at examining on the effect of inoculation of the gadolinium on the differences between the grain diameters and average size of each type of grain by way of measuring their perimeters of all phases, preliminary αMg and eutectics αMg+γ(Mg17Al12) in the prepared examined material.
    Źródło:
    Archives of Foundry Engineering; 2021, 21, 1; 31-36
    1897-3310
    2299-2944
    Pojawia się w:
    Archives of Foundry Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Effect of Inoculant Emgesal® Flux 5 on the Microstructure of Magnesium Alloy AZ91
    Autorzy:
    Rapiejko, C.
    Mikusek, D.
    Andrzejczak, A.
    Pacyniak, T.
    Powiązania:
    https://bibliotekanauki.pl/articles/380314.pdf
    Data publikacji:
    2019
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    metallography
    solidification process
    magnesium alloys
    Emgesal® Flux 5
    DTA process
    metalografia
    proces krzepnięcia
    stopy magnezu
    testy DTA
    Opis:
    This work presents the results of the research of the effect of the inoculant Emgesal Flux 5 on the microstructure of the magnesium alloy AZ91. The concentration of the inoculant was increased in samples in the range from 0.1% to 0.6%. The thermal processes were examined with the use of Derivative and Thermal Analysis (DTA). During the examination, the DTA samplers were preheated up to 180 °C. A particular attention was paid to finding the optimum amount of inoculant, which would cause fragmentation of the microstructure. The concentration of each element was verified by means of a spark spectrometer. In addition, the microstructures of the samples were examined with the use of an optical microscope, and an image analysis with a statistical analysis using the NIS-Elements program were carried out. Those analyses aimed at examining the differences between the grain diameters of phase αMg and eutectic αMg+γ(Mg17Al12) in the prepared samples as well as the average size of each type of grain by way of measuring their perimeters. This paper is an introduction to a further research of grain refinement in magnesium alloys, especially AZ91. Another purpose of this research is to achieve better micro-structure fragmentation of magnesium alloys without the related changes of the chemical composition, which should improve the mechanical properties.
    Źródło:
    Archives of Foundry Engineering; 2019, 2; 15-20
    1897-3310
    2299-2944
    Pojawia się w:
    Archives of Foundry Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Effect of Inoculation on the Mechanical Properties of AZ91
    Autorzy:
    Rapiejko, Cezary
    Mikusek, D.
    Kubiak, Krzysztof
    Pacyniak, Tadeusz
    Powiązania:
    https://bibliotekanauki.pl/articles/27314149.pdf
    Data publikacji:
    2023
    Wydawca:
    Polska Akademia Nauk. Czasopisma i Monografie PAN
    Tematy:
    metallography
    solidification process
    magnesium alloys
    Emgesal® Flux 5
    DTA process
    metalografia
    proces krzepnięcia
    stopy magnezu
    proces DTA
    Opis:
    The effect of Ca element on the microstructure evolution of the AZ91 magnesium alloy was investigated in this research. The magnesium-aluminium alloy AZ91 was inoculated with the Emgesal® Flux 5 to refine its microstructure and also improve its microstructure. Six different concentrations of the Emgesal® Flux 5 content were tested, ranging from 0.1 to 0.6% wt., and compared to the baseline of the AZ91 alloy without inoculation. Melted metal was poured into a preheated metallic mould. Samples to test were achieved after turning treatment. Formed microstructure was assessed using an optical microscope. The microstructure was refined for every tested samples. Mechanical properties such as tensile strength, elongation, Brinell hardness, Vickers microhardness, abrasion resistance and adhesive resistance were tested on the inoculated samples and compared to the non-inoculated AZ91. Introducing an Emgesal®Flux 5 inoculant caused a change in the tensile strength, elongation, Brinell hardness, Vickers microhardness, abrasive wear resistance as well as adhesive wear resistance in each examined concentration.
    Źródło:
    Archives of Foundry Engineering; 2023, 23, 2; 15--20
    1897-3310
    2299-2944
    Pojawia się w:
    Archives of Foundry Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Effect of Mischmetal on the Microstructure of the Magnesium Alloy AZ91
    Autorzy:
    Mikusek, D.
    Rapiejko, C.
    Walisiak, D.
    Pacyniak, T.
    Powiązania:
    https://bibliotekanauki.pl/articles/379653.pdf
    Data publikacji:
    2019
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    metallography
    solidification process
    magnesium alloys
    alloy additives
    mischmetal
    DTA process
    metalografia
    proces krzepnięcia
    stopy magnezu
    dodatki stopowe
    miszmetal
    proces DTA
    Opis:
    In this paper is discussed the effect of the inoculant mischmetal addition on the microstructure of the magnesium alloy AZ91. The concentration of the inoculant was increased in the samples within the range from 0.1% up to 0.6%. The thermal process was performed with the use of Derivative and Thermal Analysis (DTA). A particular attention was paid to finding the optimal amount of the inoculant, which causes fragmentation of the microstructure. The concentration of each element was verified with use of a spark spectrometer. In addition, the microstructures of every samples were examined with the use of an optical microscope and also was performed an image analysis with a statistical analysis using the NIS - Elements program. The point of those analyses was to examine the differences in the grain diameters of phase αMg and eutectic αMg+γ(Mg17Al12) in the prepared samples as well as the average size of each type of grain by way of measuring their perimeters. This paper is the second part of the introduction into a bigger research on grain refinement of magnesium alloys, especially AZ91. Another purpose of this research is to achieve better microstructure fragmentation of magnesium alloys without the relevant changes of the chemical composition, which should improve the mechanical properties.
    Źródło:
    Archives of Foundry Engineering; 2019, 4; 45-50
    1897-3310
    2299-2944
    Pojawia się w:
    Archives of Foundry Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-6 z 6

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