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    Wyświetlanie 1-6 z 6
    Tytuł:
    The Influence of Deformation Method on the Microstructure and Properties of Magnesium Alloy WE43
    Autorzy:
    Bednarczyk, I.
    Kuc, D.
    Tkocz, M.
    Tomaszewska, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/353617.pdf
    Data publikacji:
    2018
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    magnesium alloys
    SPD method
    microstructure
    static tensile test
    Opis:
    The article presents tests results of the influence of deformation methods on the microstructure and properties of alloy WE43. There were direct extrusion tests and extrusion with KoBo method performed. An assessment of the influence of the methods of deformation on the microstructure and the mechanical properties of the achieved rods from alloy WE43 was conducted. There was an analysis of microstructure carried out with the use of light and scanning microscopy techniques in the initial state and after plastic deformation. Static tensile test was conducted in temperature of 350°C at a speed of 0.0001 m·s-1 and microhardness measurements were performed of HV0.2. On the basis of the achieved mechanical tests results it was stated that in the temperature of 350°C for samples deformed with the use of KoBo method there was an effect of superplastic flow found. The value of elongation achieved was 250% which was 3 times higher than in case of classic extrusion (80%).
    Źródło:
    Archives of Metallurgy and Materials; 2018, 63, 4; 1975-1980
    1733-3490
    Pojawia się w:
    Archives of Metallurgy and Materials
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    The Effect of Extrusion in the Complex Strain State on the Microstructure and Mechanical Properties of MgAlZn Magnesium Alloys
    Autorzy:
    Bednarczyk, I.
    Kuc, D.
    Tomaszewska, A.
    Tkocz, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/353998.pdf
    Data publikacji:
    2020
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    magnesium alloys
    KoBo method
    microstructure
    electron microscope
    shape factor
    Opis:
    The paper presents the results of tests concerning the effect of the extrusion process in the complex strain state on the microstructure and properties of one of magnesium alloy with aluminium, zinc and manganese, designated AZ61. Due to its specific gravity, it is increasingly being used in the automotive and aerospace industries to reduce the weight of structural elements. As a result of plastic deformation processes, rods with a diameter of 8, 6 and 4 mm were obtained from AZ61 magnesium alloy. The microstructure analysis was performed using light and electron microscopy (STEM) techniques in the initial state and afterplastic deformation. Microstructure studies were supplemented with a quantitative analysis using the Metilo program. A number of stereological parameters were determined: average diameter of grain, shape factor. A static tensile test was carried out at 250ºC and 300ºC, at deformation rates of 0.01, 0.001 and 0.0001 m·s-1. Better plastic properties after deformation using KoBo methodwere obtained than with conventional extrusion.
    Źródło:
    Archives of Metallurgy and Materials; 2020, 65, 3; 1121-1128
    1733-3490
    Pojawia się w:
    Archives of Metallurgy and Materials
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    The Influence of Extrusion Process on the Microstructure and Mechanical Properties of Magnesium Alloys
    Autorzy:
    Bednarczyk, I.
    Kuc, D.
    Tomaszewska, A.
    Mrugała, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/958196.pdf
    Data publikacji:
    2017
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    magnesium alloys
    microstructure
    mechanical properties
    process of extrusion method KOBO
    Opis:
    The article presents the results of plastic shaping tests of AZ61 and WE43 alloys. There were both classic extrusion tests as well as extrusion tests of KOBO method. An assessment was made of the influence of extrusion process parameters on the mechanical properties and the structure of the alloys. On the basis of achieved results of mechanical properties for alloys AZ31 and WE43 the susceptibility of those alloys to plastic shaping was determined. Quantitative tests of structure assessment in case of alloys AZ61 and WE43 after extrusion with the use of KOBO method were conducted with the use of METILO program. It has been shown that extrusion AZ61,WE43 alloys method KOBO leads to considerable fragmentation of grains.
    Źródło:
    Archives of Metallurgy and Materials; 2017, 62, 2A; 545-550
    1733-3490
    Pojawia się w:
    Archives of Metallurgy and Materials
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Microstructure and Properties of Selected Magnesium-Aluminum Alloys Prepared for SPD Processing Technology
    Autorzy:
    Cizek, L.
    Rusz, S.
    Hilser, O.
    Śliwa, R.
    Kuc, D.
    Tański, T.
    Tkocz, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/356616.pdf
    Data publikacji:
    2017
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    magnesium alloys
    severe plastic deformation
    SPD
    ECAP
    tensile test
    microstructure
    fracture
    Opis:
    A growing interest in wrought magnesium alloys has been noticed recently, mainly due to development of various SPD (severe plastic deformation) methods that enable significant refinement of the microstructure and – as a result – improvement of various functional properties of products. However, forming as-cast magnesium alloys with the increased aluminum content at room temperature is almost impossible. Therefore, application of heat treatment before forming or forming at elevated temperature is recommended for these alloys. The paper presents the influence of selected heat treatment conditions on the microstructure and the mechanical properties of the as-cast AZ91 alloy. Deformation behaviour of the as-cast AZ61 alloy at elevated temperatures was analysed as well. The microstructure analysis was performed by means of both light microscopy and SEM. The latter one was used also for fracture analysis. Moreover, the effect of chemical composition modification by lithium addition on the microstructure of the AZ31-based alloy is presented. The test results can be helpful in preparation of the magnesium-aluminum alloys for further processing by means of SPD methods.
    Źródło:
    Archives of Metallurgy and Materials; 2017, 62, 4; 2365-2370
    1733-3490
    Pojawia się w:
    Archives of Metallurgy and Materials
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Thermal Assessment of Modified Ultra-Light Magnesium-Lithium Alloys
    Autorzy:
    Król, M.
    Mikuszewski, T.
    Kuc, D.
    Tański, T.
    Hadasik, E.
    Powiązania:
    https://bibliotekanauki.pl/articles/354863.pdf
    Data publikacji:
    2017
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    cast magnesium-lithium alloys
    crystallisation
    thermal-derivative analysis
    grain refinement
    Opis:
    The paper presents the results of the influence of commercial TiBor and AlSr10 master alloys on the refine the grains size, hardness and crystallisation process based on the thermal-derivation analysis of light cast magnesium-lithium-aluminium alloys. The effects of TiBor and AlSr10 content on the characteristic parameters of the crystallisation process of Mg-Li-Al alloys were investigated by thermal-derivative analysis (TDA). Microstructural evaluations were identified by light microscope, X-ray diffraction, scanning electron microscopy, and energy dispersive X-ray spectroscopy. The results showed that the addition of TiBor master alloy reduced the grain size of Mg-9Li-1.5Al cast alloy from 900 μm to 500 μm, while the addition of AlSr10 master alloy reduced the grain size of investigated cast alloy from 900 μm to 480 μm. Moreover, an addition of TiBor and AlSr10 simultaneously reduced the grain size from 900 μm to 430 μm. Results from the thermal-derivative analysis showed that the addition of grain refinement causes a decrease in nucleation temperature and solidus temperature.
    Źródło:
    Archives of Metallurgy and Materials; 2017, 62, 4; 2433-2440
    1733-3490
    Pojawia się w:
    Archives of Metallurgy and Materials
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Obróbka plastyczna stopów magnezu
    Plastic forming of magnesium alloys
    Autorzy:
    Hadasik, E.
    Kuc, D.
    Powiązania:
    https://bibliotekanauki.pl/articles/212078.pdf
    Data publikacji:
    2013
    Wydawca:
    Sieć Badawcza Łukasiewicz - Instytut Obróbki Plastycznej
    Tematy:
    stopy magnezu
    charakterystyki plastyczności
    mikrostruktura
    walcowanie
    kucie
    wyciskanie
    magnesium alloys
    plasticity characteristics
    microstructure
    rolling
    forging
    extrusion
    Opis:
    W artykule, który ma charakter przeglądowy, wskazano na rosnące zainteresowanie w ostatnich latach stopami magnezu do zastosowań na elementy środków transportu. Podano klasyfikację stopów magnezu do obróbki plastycznej, metody wytwarzania wyrobów drogą walcowania, wyciskania i kucia oraz wskazano trudności przy realizacji procesów kształtowania plastycznego. W badaniach stopów AZ31, AZ61, AZ80 i WE43 przedstawiono relacje pomiędzy strukturą, a parametrami odkształcania. Wskazano na występowanie dwóch mechanizmów odkształcania w zależności od temperatury: poślizgu i bliźniakowania. Podano zależności pomiędzy wielkościami charakteryzującymi plastyczność a parametrem Zenera–Hollomona. Przedstawiono wyniki prowadzonych prac w zakresie procesów obróbki plastycznej stopów magnezu - walcowania, kucia oraz wyciskania oraz przykłady wykonanych wyrobów.
    The article that is a review indicates a growing interest in magnesium alloys concerning applications related to the elements of means of transport over the last few years. It specifies a classification of magnesium alloys intended for plastic forming as well as rolling, extrusion and forging production methods, and, additionally, difficulties connected with plastic forming processes. In the tests of the alloys AZ31, AZ61, AZ80 and WE43 there are presented relations between a structure and deformation parameters. The study shows two deformation mechanisms, i.e. slip and twinning that appear depending on the temperature. Furthermore, the paper lists relationships between the values describing plasticity and the Zener-Hollomon parameter. It also presents results of researches performed within the scope of magnesium alloy plastic forming processes - rolling, forging and extrusion, and examples of manufactured products.
    Źródło:
    Obróbka Plastyczna Metali; 2013, 24, 2; 131-146
    0867-2628
    Pojawia się w:
    Obróbka Plastyczna Metali
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-6 z 6

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