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    Wyświetlanie 1-8 z 8
    Tytuł:
    XRD and EBSD Measurements of Directional Solidification Fe-C Eutectic Alloy
    Autorzy:
    Trepczyńska-Łent, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/382146.pdf
    Data publikacji:
    2016
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    X-ray diffraction
    EBSD technique
    carbide eutectic
    directional solidification
    dyfrakcja rentgenowska
    dyfrakcja elektronów wstecznie rozproszonych
    krzepnięcie kierunkowe
    Opis:
    In a vacuum Bridgman-type furnace, under an argon atmosphere, directionally solidified sample of Fe-C alloy was produced. The pulling rate was v = 83 μm/s (300 mm/h) and constant temperature gradient G = 33,5 K/mm. The microstructure of the sample was examined on the longitudinal section using an Optical Microscope and Scanning Electron Microscope. The X-ray diffraction and electron backscatter diffraction technique (EBSD) have been used for the crystallographic analysis of carbide particles in carbide eutectic. The X-ray diffraction was made parallel and perpendicular to the axis of the goniometer. The EBSD shows the existence of iron carbide Fe3C with orthorhombic and hexagonal structure. Rapid solidification may cause a deformation of the lattice plane which is indicated by different values of the lattice parameters. Such deformation could also be the result of directional solidification. Not all of the peaks in X–ray diffractograms were identified. They may come from other iron carbides. These unrecognized peaks may also be a result of the residual impurity of alloy.
    Źródło:
    Archives of Foundry Engineering; 2016, 16, 4; 169-174
    1897-3310
    2299-2944
    Pojawia się w:
    Archives of Foundry Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    X-ray Diffraction Study of Directional Solidification Ledeburite
    Autorzy:
    Trepczyńska-Łent, M.
    Szykowny, T.
    Powiązania:
    https://bibliotekanauki.pl/articles/379952.pdf
    Data publikacji:
    2015
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    X-ray diffraction
    ledeburite eutectic
    directional solidification
    dyfrakcja rentgenowska
    ledeburyt
    krzepnięcie kierunkowe
    Opis:
    Directionally solidified sample of Fe-Fe3C eutectic alloy were produced under an argon atmosphere in a vacuum Bridgman-type furnace to study the eutectic growth with v = 167 μm/s pulling rate and constant temperature gradient G = 33.5 K/mm. Since how the growth texture of eutectic cementite is related to its growth morphology remains unclear, the current study aims to examine this relationship. The technique such as X-ray diffraction, have been used for the crystallographic analysis of carbide particles in white cast irons.
    Źródło:
    Archives of Foundry Engineering; 2015, 15, 3; 71-76
    1897-3310
    2299-2944
    Pojawia się w:
    Archives of Foundry Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Destruction Mechanism of Z10400 Zn-based Alloy Subjected to Cavitational Erosion
    Autorzy:
    Jasionowski, R.
    Zasada, D.
    Polkowski, W.
    Powiązania:
    https://bibliotekanauki.pl/articles/380734.pdf
    Data publikacji:
    2013
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    zinc alloy
    cavitation wear
    Electron Backscattered Diffraction (EBSD)
    stop cynku
    zużycie kawitacyjne
    dyfrakcja elektronów wstecznie rozproszonych
    Opis:
    Z10400 zinc-based alloy has a very good casting properties and high resistance to corrosion. These two advantages make that Z10400 zinc-based alloy is commonly used for cathodic protection of hulls of ships. Cathodic anodes made of Z10400 zinc-based alloy in the propeller and flap rudder areas are also additionally exposed to the cavitation erosion. The aim of this work was to determine the cavitation erosion resistance of Z10400 zinc-based alloy, which is applied as protectors in cathodic protection of hulls of ships. The examination of cavitational erosion was carried out on a jet-impact measuring device. Study of the mechanism of the destruction of Z10400 alloy based on analysis was performed with scanning electron microscope Quanta 3d FEG and electron back scattered diffraction (EBSD) method.
    Źródło:
    Archives of Foundry Engineering; 2013, 13, 2 spec.; 48-52
    1897-3310
    2299-2944
    Pojawia się w:
    Archives of Foundry Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    EBSD Strain Analysis of CuZn10 Alloy in As-cast State and After Plastic Working and Annealing During Cavitational Wear
    Autorzy:
    Jasionowski, R.
    Zasada, D.
    Polkowski, W.
    Powiązania:
    https://bibliotekanauki.pl/articles/381392.pdf
    Data publikacji:
    2013
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    Electron Backscattered Diffraction (EBSD)
    cavitation wear
    strain analysis
    dyfrakcja elektronów wstecznie rozproszonych
    zużycie kawitacyjne
    analiza odkształceń
    Opis:
    Electron backscatter diffraction (EBSD) system in conjunction with scanning electron microscope (SEM) allows performing full material characterization which include analysis of individual grain orientations, crystal orientation, global and local texture, phase identification and distribution or microstrain mapping. EBSD technique may be also applied for assessing lattice strain introduced during local plastic deformation due to its close relationship with development of dislocation substructure. The aim of this study was analysis of surface deformation by EBSD method of CuZn10 alloy in as-cast state and after plastic working and annealing, with different grain size at the beginning of the cavitation destruction process. The local changes of plastic deformation inside each grain were expressed by Grain Orientation Spread (GOS) and Kernel Average Misorientation (KAM) parameters.
    Źródło:
    Archives of Foundry Engineering; 2013, 13, 2 spec.; 53-60
    1897-3310
    2299-2944
    Pojawia się w:
    Archives of Foundry Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Ausferritic Microstructure Phase Analysis in Ductile Iron
    Autorzy:
    Trzaskowski, W.
    Nawrocki, P.
    Łukasik, K.
    Myszka, D.
    Powiązania:
    https://bibliotekanauki.pl/articles/381436.pdf
    Data publikacji:
    2018
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    image analysis
    ausferritic ductile iron
    x-ray diffraction
    austenite
    ferrite
    analiza obrazu
    żeliwo sferoidalne
    dyfrakcja rentgenowska
    austenit
    ferryt
    Opis:
    Image analysis allows to acquire a number of valuable quantitative informations on the observed structure and make appropriate conclusions. So far, a large part of analyzed images came only from light microscopes, where it was a possibility of accurately distinguish the different phases on the plane. However, the problem happened in the case of the observation of images obtained by scanning electron microscopy. In this case, the presence of various shades of gray, and the spaciousness of the image attained. To perform the analysis the matrix images of the ausferritic ductile iron were used. Full analysis was carried out using the computer program MicroMeter 1.03. Results obtained in the analysis were related directly to the results from X-ray diffraction. Obtained as a result of the analysis were related directly to the results from X-ray diffractometer. The following technique has weaknesses, including the misinterpretation by the operator microscope or program. After all, it was possible to obtain similar results to the result that has been obtained from X-ray diffractometer.
    Źródło:
    Archives of Foundry Engineering; 2018, 18, 2; 112-116
    1897-3310
    2299-2944
    Pojawia się w:
    Archives of Foundry Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Analysis of Thermal Stability of Intermetallic Phases Precipitates in Continuous Ingots of AlCu4MgSi Alloy
    Autorzy:
    Nuckowski, P. M.
    Kondracki, M.
    Wróbel, T.
    Powiązania:
    https://bibliotekanauki.pl/articles/382300.pdf
    Data publikacji:
    2019
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    aluminium alloys
    phase analysis
    high temperature X-ray diffraction
    thermal-derivative analysis
    stopy aluminium
    analiza fazowa
    wysokotemperaturowa dyfrakcja rentgenowska
    analiza termopochodna
    Opis:
    The article presents the results of research concerning to AlCu4MgSi alloy ingots produced using horizontal continuous casting process. The presented research was focused on the precise determination of phase composition of the precipitates formed during the solidification of ingots and the analysis of their thermal stability. In order to assess the morphology of precipitates in the AlCu4MgSi alloy, data obtained by using a computer simulation of thermodynamic phenomena were compiled with results obtained using advanced research techniques, i.e. High-temperature X-ray diffraction (HT-XRD), SEM-EDS, Thermal and derivative analysis (TDA) and Glow discharge optical emission spectroscopy (GD OES). SEM observations and analysis of chemical composition in micro-areas showed that the precipitates are mainly intermetallic θ-Al2Cu and β-Mg2Si phases, and also presence of Al19Fe4MnSi2 intermetallic phase was confirmed by X-ray diffraction studies. Based on the prepared Thermo-Calc simulation data, high-temperature X-ray diffraction measurements were conducted.
    Źródło:
    Archives of Foundry Engineering; 2019, 4; 99-104
    1897-3310
    2299-2944
    Pojawia się w:
    Archives of Foundry Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Badanie skuteczności klasyfikacji w oparciu o wykorzystanie metody laserowego pomiaru wielkości ziaren
    Investigations of the effectiveness of the classification based on the laser method of the grain size estimation
    Autorzy:
    Holtzer, M.
    Dańko, R.
    Skrzyński, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/380400.pdf
    Data publikacji:
    2012
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    masa formierska
    regeneracja masy formierskiej
    masa zużyta
    analiza ziarnowa
    dyfrakcja laserowa
    moulding sand
    sand reclamation
    used sand
    grain analysis
    laser diffraction
    Opis:
    Analiza granulometryczna jest istotnym parametrem, za pomocą którego ocenia się prawidłowość przebiegu wielu procesów przeróbczych a jej wyniki stanowią istotny element oceny i optymalizacji parametrów pracy tego typu urządzeń. Z tego powodu bardzo istotne jest stosowanie najbardziej precyzyjnych sposobów oceny składu granulometrycznego materiałów polidyspersyjnych, zgodnie z najnowszymi osiągnięciami techniki pomiarowej w tym zakresie. Najnowszymi urządzeniami do pomiaru wielkości cząstek są urządzenia wykorzystujące zjawisko dyfrakcji laserowej. W artykule przedstawiono badania skuteczności klasyfikacji w oparciu o wykorzystanie metody laserowego pomiaru wielkości ziaren. W ramach badań przeprowadzono badania skuteczności klasyfikacji w urządzeniu kaskadowym regeneratu po regeneracji masy zużytej z żywicą furfurylową FR 75 A. W wyniku badań stwierdzono, że przy wydajnościach podawania nadawy w zakresie 0,5-1,0 Mg/h przy prędkości powietrza ok. 1 m/s następuje oddzielenie z zapylonej masy 80-85% pyłów i frakcji o prześwicie poniżej sita 0,1 mm, a niekiedy poniżej sita 0,16 mm.
    A grain size analysis is an essential parameter, by means of which the correctness of several treatment processes is estimated, and its results constitute an essential element of assessment and optimization of operational parameters of this type of devices. Due to that, it is very important to apply the most accurate ways of assessing the grain size composition of polydispersive materials - in accordance with the newest achievements of the measuring technique. The most advanced devices for grain size measurements are the ones utilising the laser diffraction effect. The investigations of the effectiveness of the classification performed on the basis of the laser method of grain size measurements are presented in the paper. The effectiveness of the classification of the reclaimed spent sand with the FR 75 A furfuryl resin in the cascade device was checked. It was found that at the feed material supply being in the range: 0.5-1.0 Mg/h, at the air velocity app. 1 m/s the separation of 80-85% of dusts and fractions, of a clearance below 0.1 mm sieve and sometimes below 0.16 mm sieve, occurs.
    Źródło:
    Archives of Foundry Engineering; 2012, 12, 1s; 63-68
    1897-3310
    2299-2944
    Pojawia się w:
    Archives of Foundry Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    The Influence of Variable Parameters of Horizontal Continuous Casting on the Structure of AlCu4MgSi Alloy Ingots
    Autorzy:
    Nuckowski, P. M.
    Wróbel, T.
    Powiązania:
    https://bibliotekanauki.pl/articles/380484.pdf
    Data publikacji:
    2018
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    metallography
    aluminum alloys
    continuous casting
    structure analysis
    X-ray diffraction
    phase analysis
    metalografia
    stopy aluminium
    odlewanie ciągłe
    analiza struktury
    dyfrakcja rentgenowska
    analiza fazy
    Opis:
    The article presents results of research on the influence of variable parameters of horizontal continuous casting on the structure of AlCu4MgSi (EN AW-2017A) alloy ingots. The special character of the process allows for a continuous change of some of its parameters, namely, of the casting speed and of the rate of the cooling fluid flow thorough the crystallizer. These parameters have a significant impact on the crystallization process of the liquid metal. Depending on the cooling rate, intensity of the convection inside the solidifying alloy, and its chemical composition, there may arise some differences in the structure of the cast. In this study, ingots obtained at different casting speeds have been analyzed. The research methodology, based on light microscopy and electron microscopy (SEM), as well as energy dispersive spectroscopy (EDS) and X-ray diffraction (XRD), allowed for a thorough examination of the structure of the studied materials. The results were shown that an increase in the ingot casting speed leads to an increase in the average grain surface area.
    Źródło:
    Archives of Foundry Engineering; 2018, 18, 1; 196-202
    1897-3310
    2299-2944
    Pojawia się w:
    Archives of Foundry Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-8 z 8

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