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    Wyświetlanie 1-5 z 5
    Tytuł:
    Thickness evaluation of the carbon coatings manufactured on magnesium alloys using optical profiler
    Autorzy:
    Gołąbczak, M.
    Jacquet, P.
    Powiązania:
    https://bibliotekanauki.pl/articles/99752.pdf
    Data publikacji:
    2012
    Wydawca:
    Wrocławska Rada Federacji Stowarzyszeń Naukowo-Technicznych
    Tematy:
    AZ31 magnesium alloy
    PACVD technology
    carbon coating
    optical profiler
    roughness parameters
    Opis:
    One of the problems in identification of carbon nanocoatings is measurement of their thickness. There are a lot of methods which allow for determination of thickness i.e. SEM analysis of cross section of sample with manufactured coating, nanoindentation analysis with using DSP (Digital Signal Processing) method, roughness analysis with using different kind of profilers. In this paper the technology of manufacturing of carbon coatings on AZ31 magnesium light alloy has been depicted and optical profiler has been used for thickness evaluation of these coating. Obtained results allowed for precise estimation of manufactured carbon coatings thickness. In this way it was also possible to compare obtained thickness results with thickness evaluated by other methods.
    Źródło:
    Journal of Machine Engineering; 2012, 12, 2; 29-36
    1895-7595
    2391-8071
    Pojawia się w:
    Journal of Machine Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Qualitative Research of AZ31 Magnesium Alloy Aircraft Brackets Produced by a New Forging Method
    Autorzy:
    Dziubińska, A.
    Gontarz, A.
    Dziedzic, K.
    Powiązania:
    https://bibliotekanauki.pl/articles/356949.pdf
    Data publikacji:
    2016
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    forming; aircraft brackets
    AZ31 magnesium alloy
    three-slide forging press
    FEM simulation
    experiments
    Opis:
    The paper reports a selection of numerical and experimental results of a new closed-die forging method for producing AZ31 magnesium alloy aircraft brackets with one rib. The numerical modelling of the new forming process was performed by the finite element method.The distributions of stresses, strains, temperature and forces were examined. The numerical results confirmed that the forgings produced by the new forming method are correct. For this reason, the new forming process was verified experimentally. The experimental results showed good agreement with the numerical results. The produced forgings of AZ31 magnesium alloy aircraft brackets with one rib were then subjected to qualitative tests.
    Źródło:
    Archives of Metallurgy and Materials; 2016, 61, 2B; 1003-1008
    1733-3490
    Pojawia się w:
    Archives of Metallurgy and Materials
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Microstructure of magnesium alloy AZ31 after low-speed extrusion
    Mikrostruktura stopu magnezu AZ31 po wyciskaniu z małymi prędkościami
    Autorzy:
    Skubisz, P.
    Skowronek, T.
    Sińczak, J.
    Powiązania:
    https://bibliotekanauki.pl/articles/264326.pdf
    Data publikacji:
    2007
    Wydawca:
    Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Wydawnictwo AGH
    Tematy:
    stop magnezu AZ31
    wyciskanie współbieżne
    wielkość ziarna
    powierzchnia względna granic ziaren
    twardość
    AZ31 magnesium alloy
    direct extrusion
    grain size
    hardness
    Opis:
    Direct extrusion of magnesium alloy AZ31 and changes in microstructure resultant from low-speed small-reduction extrusion are presented. The results show possibilities of grain refinement and improvement of mechanical properties associated with limited amount of generated deformation heat in aspect of using as-extruded material as a forging stock.
    Praca przedstawia wyniki prób wyciskania współbieżnego stopu AZ31, obrazujące zmiany zachodzące w mikrostrukturze po wyciskaniu z małym stopniem przerobu oraz małymi prędkościami. Ukazują one szerokie możliwości rozdrobnienia ziarna oraz towarzyszącą im poprawę własności materiału spowodowaną ograniczeniem ilości generowanego ciepła odkształcenia w aspekcie zastosowania wyciskanych prętów jako wsadu do kucia matrycowego.
    Źródło:
    Metallurgy and Foundry Engineering; 2007, 33, 2; 113-120
    1230-2325
    2300-8377
    Pojawia się w:
    Metallurgy and Foundry Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Fatigue Characteristics of Selected Light Metal Alloys
    Autorzy:
    Cieśla, M.
    Junak, G.
    Marek, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/357014.pdf
    Data publikacji:
    2016
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    Ti-6Al-4V titanium alloy
    2017A aluminium alloy
    AZ31 magnesium alloy
    low-cycle fatigue
    high-cycle fatigue
    fatigue life
    Opis:
    The paper addresses results of fatigue testing of light metal alloys used in the automotive as well as aerospace and aviation industries, among others. The material subject to testing comprised hot-worked rods made of the AZ31 alloy, the Ti-6Al-4V two-phase titanium alloy and the 2017A (T451) aluminium alloy. Both low- and high-cycle fatigue tests were conducted at room temperature on the cycle asymmetry ratio of R=-1. The low-cycle fatigue tests were performed using the MTS-810 machine on two levels of total strain, i.e.Δεc= 1.0% and 1.2%. The high-cycle fatigue tests, on the other hand, were performed using a machine from VEB Werkstoffprufmaschinen-Leipzig under conditions of rotary bending. Based on the results thus obtained, one could develop fatigue life characteristics of the materials examined (expressed as the number of cycles until failure of sample Nf) as well as characteristics of cyclic material strain σa=f(N) under the conditions of low-cycle fatigue testing. The Ti-6Al-4V titanium alloy was found to be characterised by the highest value of fatigue life Nf, both in lowand high-cycle tests. The lowest fatigue life, on the other hand, was established for the aluminium alloys examined. Under the high-cycle fatigue tests, the life of the 2017A aluminium and the AZ31 magnesium alloy studied was determined by the value of stress amplitude σa. With the stress exceeding 150 MPa, it was the aluminium alloy which displayed higher fatigue life, whereas the magnesium alloy proved better on lower stress.
    Źródło:
    Archives of Metallurgy and Materials; 2016, 61, 1; 271-274
    1733-3490
    Pojawia się w:
    Archives of Metallurgy and Materials
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Effect of spray distance on the microstructure and corrosion resistance of WC - based coatings sprayed by HVOF
    Autorzy:
    Jonda, Ewa
    Łatka, Leszek
    Maciej, Artur
    Godzierz, Marcin
    Gołombek, Klaudiusz
    Radziszewski, Andrzej
    Powiązania:
    https://bibliotekanauki.pl/articles/2204526.pdf
    Data publikacji:
    2023
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    WC-based powders
    AZ31 magnesium alloy
    high velocity oxy fuel
    HVOF
    microstructure
    corrosion resistance
    stop magnezu AZ31
    mikrostruktura
    odporność na korozję
    natryskiwanie naddźwiękowe cieplne
    proszek na bazie węglika wolframu
    Opis:
    Cermet coatings provide protection against aggressive operating environment of machine and device elements, such as corrosion, wear or high-temperature conditions. Currently WC-based cermet coatings are frequently used in the different industry branches. In this work, conventional WC-based powders (WC-Co and WC-Co-Cr) were sprayed with High Velocity Oxy Fuel (HVOF) onto AZ31 magnesium alloy with different spray distances (320 and 400 mm). The aim of the research was to investigate the effect of the spray distance on the microstructure of the coatings, phase composition and electrochemical corrosion resistance. Results revealed that higher spray distance results in greater porosity, 1.9% and 2.3% for 320 mm and 2.8% and 3.1% for 400 mm in case of WC-Co and WC-Co-Cr coatings, respectively. Also the influence has been observed for coatings microhardness, c.a. 1300 HV0.3 for shorter spray distance, whereas for longer one it was less than 1100 HV0.3. The corrosion resistance estimated in potentiodynamic polarization measurements was the best for WC-Co-Cr coating deposited from the shorter spray distance, corrosion current density was equal to 2.9 µA·cm-2 and polarization resistance was equal to 8424 Ω∙cm2.
    Źródło:
    Bulletin of the Polish Academy of Sciences. Technical Sciences; 2023, 71, 2; art. no. e144610
    0239-7528
    Pojawia się w:
    Bulletin of the Polish Academy of Sciences. Technical Sciences
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-5 z 5

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