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Wyszukujesz frazę "crystallization properties" wg kryterium: Temat

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    Wyświetlanie 1-4 z 4
    Tytuł:
    Modification of the Structure and Properties of FeSiB Amorphous Ribbon by Interference Pulsed Laser Heating
    Autorzy:
    Czyż, O.
    Kusiński, J.
    Radziszewska, A.
    Ostrowski, R.
    Morgiel, J.
    Kanak, J.
    Kąc, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/355908.pdf
    Data publikacji:
    2018
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    laser heating
    FeSiB
    crystallization
    magnetic properties
    structure
    Opis:
    Paper describes the results of Fe80Si11B9 amorphous ribbon investigation after pulsed laser interference heating and conventional annealing. As a result of interference heating periodically placed laser heated microareas were obtained. Structure characterisation by scanning and transmission electron microscopy showed in case of laser heated samples presence of crystalline nanostructure in amorphous matrix. Microscopy observations showed significant difference in material structure after laser heating – nanograin structure, and material after annealing – dendritic structure. Magnetic force microscopy investigation showed expanded magnetic structure in laser heated microareas, while amorphous matrix did not give magnetic signal. Change of magnetic properties was examined by magnetic hysteresis loop measurement, which showed that the laser heating did not have a significant influence on soft magnetic properties.
    Źródło:
    Archives of Metallurgy and Materials; 2018, 63, 4; 2001-2007
    1733-3490
    Pojawia się w:
    Archives of Metallurgy and Materials
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Mechanical properties of two manganese steels
    Autorzy:
    Cagala, M.
    Mazancová, E.
    Lichý, P.
    Beňo, J.
    Břuska, M.
    Špirutová, N.
    Powiązania:
    https://bibliotekanauki.pl/articles/382392.pdf
    Data publikacji:
    2012
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    krystalizacja
    właściwości mechaniczne
    stal wysokomanganowa
    theory of crystallization
    mechanical properties
    high-manganese steel
    reduction of area
    precipitates
    Opis:
    The article is focused on thermomechanical and plastic properties of two high-manganese TRIPLEX type steels with an internal marking 1043 and 1045. Tensile tests at ambient temperature and at a temperature interval 600 C to 1100 C were performed for these heats with a different chemical composition. After the samples having been ruptured, ductility was observed which was expressed by reduction of material after the tensile test. Then the stacking fault energy was calculated and dilatation of both high-manganese steels was measured. At ambient temperature (20 C), 1043 heat featured higher tensile strength by 66MPa than 1045 heat. Microhardness was higher by 8HV0,2 for 1045 steel than for 1043 steel (203HV0,2). At 20 C, ductility only differed by 3% for the both heats. Decrease of tensile properties occurred at higher temperatures of 600 up to 1100 C. This tensile properties decrease at high temperatures is evident for most of metals. The strength level difference of the both heats in the temperature range 20 C up to 1100 C corresponded to 83 MPa, while between 600 C and 1100 C the difference was only 18 MPa. In the temperature range 600 C to 800 C, a decrease in ductility values down to 14 % (1045 heat), or 22 % (1043 heat), was noticed. This decrease was accompanied with occurrence of complex Aluminium oxides in a superposition with detected AlN particles. Further ductility decrease was only noted for 1043 heat where higher occurrence of shrinkage porosity was observed which might have contributed to a slight decrease in reduction of area values in the temperature range 900 C to 1100 C, in contrast to 1045 heat matrix.
    Źródło:
    Archives of Foundry Engineering; 2012, 12, 1; 9-12
    1897-3310
    2299-2944
    Pojawia się w:
    Archives of Foundry Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Crystallization Behavior and Properties of Hypereutectic Al-Si Alloys with Different Iron Content
    Autorzy:
    Deev, V.
    Prusov, E.
    Prikhodko, O.
    Ri, E.
    Kutsenko, A.
    Smetanyuk, S.
    Powiązania:
    https://bibliotekanauki.pl/articles/1837865.pdf
    Data publikacji:
    2020
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    aluminium-silicon alloys
    hypereutectic alloy
    iron-rich compounds
    intermetallics phase
    crystallization
    mechanical properties
    stop aluminiowo-krzemowy
    stop nadeutektyczny
    fazy międzymetaliczne
    krystalizacja
    właściwości mechaniczne
    Opis:
    Understanding the influence of iron impurity on the formation of the structure and the properties of hypereutectic aluminum-silicon alloys are important for achieving the required quality of castings, especially those obtained from secondary materials. In the present work, the influence of different iron contents (0.3, 1.1, and 2.0 wt.%) on the crystallization process, microstructure and mechanical properties of the Al-15% Si alloy was studied. It is shown that the presence of iron impurity in the Al-15% Si alloy leads to increasing the eutectic crystallization time from 6.2 to 7.6 s at increasing the iron content from 0.3 wt.% to 1.1 wt.%, changing the structure of the alloy eutectic in the solid state. The primary silicon and β-Al5SiFe phase coexist in the structure of the Al-15% Si alloys at a temperature below 575°C in the range of iron concentrations from 0 to 2 wt.% in equilibrium conditions. In the experimental alloys structure, the primary crystals of the β-phase were metallographically detected only in the alloys containing 1.1 and 2 wt.% of iron impurity. Increase of the iron content up to 2 wt.% significantly reduces the mechanical properties of the Al-15% Si alloy due to the formation of large platelet-like inclusions of β-Al5SiFe phase.
    Źródło:
    Archives of Foundry Engineering; 2020, 20, 4; 101-107
    1897-3310
    2299-2944
    Pojawia się w:
    Archives of Foundry Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Effect of the remelting on transformations in Co-Cr-Mo prosthetics alloy
    Autorzy:
    Kacprzyk, B.
    Szymczak, T.
    Gumienny, G.
    Klimek, L.
    Powiązania:
    https://bibliotekanauki.pl/articles/382914.pdf
    Data publikacji:
    2013
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    theory of crystallization
    remelting
    thermal analysis
    derivative analysis
    microstructure
    composition
    alloys properties
    prosthetics alloys
    teoria krystalizacji
    przetapianie
    analiza termiczna
    analiza derywacyjna
    mikrostruktura
    właściwości stopu
    stop protetyczny
    Opis:
    In the article we were studing the impact of the remelting on transformations in Co-Cr-Mo prosthetics alloy. The TDA curves were analyzed, the microstructure was examined, the analysis of the chemical composition and hardness using the Brinell method was made. It was found that the obtained microstructure of the alloys that we studied do not differ significantly. In all four samples, microscopic images were similar to each other. The volume, size and distribution of the phases remain similar. Analysis of the chemical composition showed that all the samples fall within the compositions provided for the test alloy. Further to this the hardness of the samples, regardless of the number of remeltings did not show any significant fluctuations and remained within the error limit. After analyzing all the results, it can be concluded that the remeltings of the alloys should not have a significant impact on their properties. Secondarily melted alloys can be used for prosthetics works.
    Źródło:
    Archives of Foundry Engineering; 2013, 13, 3; 47-50
    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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