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    Wyświetlanie 1-7 z 7
    Tytuł:
    Warm Tensile Deformation Behavior and Constitutive Equation of Supersaturated Solid-Solutionized Al-9Mg Extruded Alloy
    Autorzy:
    Yang, Seung Y.
    Kim, Bong H.
    Lee, Da B.
    Choi, Kweon H.
    Kim, Nam S.
    Ha, Seong H.
    Yoon, Young O.
    Lim, Hyun K.
    Kim, Shae
    Kim, Young J.
    Powiązania:
    https://bibliotekanauki.pl/articles/2048882.pdf
    Data publikacji:
    2021
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    aluminum alloy
    Al-9Mg alloy
    tensile test
    constitutive equation
    Opis:
    In this paper, as a purpose to apply the supersaturated solid-solutionized Al-9Mg alloy to the structural sheet parts of automotive, tensile tests were conducted under the various conditions and a constitutive equation was derived from the tensile test results. Al-9Mg alloy was produced using a special Mg master alloy containing Al2Ca during the casting process and extruded into the sheet. In order to study the deformation behavior of Al-9Mg alloy in warm temperature forming environments, tensile tests were conducted under the temperature of 373 K-573 K and the strain rate of 0.001/s~0.1/s. in addition, by using the raw data obtained from tensile tests, a constitutive equation of the Al-9Mg alloy was derived for predicting the optimized condition of the hot stamping process. Al-9Mg alloy showed uncommon deformation behavior at the 373 K and 473 K temperature conditions. The calculated curves from the constitutive equation well-matched with the measured curves from the experiments particularly under the low temperature and high strain rate conditions.
    Źródło:
    Archives of Metallurgy and Materials; 2021, 66, 4; 1013-1018
    1733-3490
    Pojawia się w:
    Archives of Metallurgy and Materials
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Zgrzewanie tarciowe kompozytów Al/Al2O3 ze stopami Al 44200
    Joining Al/Al2O3 composites and 44200 aluminium alloys by friction welding technique
    Autorzy:
    Siedlec, R.
    Strąk, C.
    Powiązania:
    https://bibliotekanauki.pl/articles/192212.pdf
    Data publikacji:
    2014
    Wydawca:
    Sieć Badawcza Łukasiewicz - Instytut Technologii Materiałów Elektronicznych
    Tematy:
    zgrzewanie tarciowe
    kompozyt
    ceramika
    stop Al
    friction welding
    composite
    ceramic
    aluminum alloy
    Opis:
    Zgrzewanie tarciowe to jedna z bardziej ekonomicznych metod trwałego łączenia materiałów w stanie stałym. Metoda ta umożliwia wykonywanie złączy zarówno jednoimiennych, jak i różnoimiennych w bardzo krótkim czasie. Zaletą zgrzewania tarciowego jest możliwość uzyskania złączy o wysokiej jakości. Zgrzewanie tarciowe kompozytów z metalami, stwarza nowe możliwości aplikacji z uwagi na fakt, że oba materiały posiadają różne właściwości fizyczne oraz mechaniczne. W pracy przeprowadzono próby spajania stopu aluminium 44200 (wg normy PN-EN 1706:2001) z kompozytami Al/Al2O3. W pracy przeprowadzono następujące badania złączy stop aluminium-kompozyt uzyskanych metodą zgrzewania tarciowego: mikroskopowe, twardości, mechaniczne (pomiar wytrzymałości na rozciąganie). Wykonane badania miały na celu ocenę jakości połączenia pomiędzy stopem 44200, a kompozytami na osnowie stopu aluminium wzmacnianymi fazą ceramiczną Al/Al2O3.
    Friction welding is one of the most economical processes for durable joining of solid-state materials. This technique allows bonding similar and dissimilar materials in a very short time. Friction welding of metals and composites opens up new application opportunities due to the fact that these materials have different physical and mechanical properties. In the present study, 44200 aluminum alloy was friction welded to Al/Al2O3 composite. In addition, the following analyses were performed for all joints produced by friction welding: optical microscopy, microhardness measurements and tensile strength measurements. All studies were carried out to evaluate the quality of bonding between aluminum alloy and metal matrix composites reinforced with a ceramic phase of Al/Al2O3.
    Źródło:
    Materiały Elektroniczne; 2014, T. 42, nr 3, 3; 11-19
    0209-0058
    Pojawia się w:
    Materiały Elektroniczne
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Analysis of the Properties of EN AC 51200 Aluminum Alloy
    Autorzy:
    Uhríčik, M.
    Palček, P.
    Chalupová, M.
    Hanusová, P.
    Kuchariková, L.
    Powiązania:
    https://bibliotekanauki.pl/articles/356674.pdf
    Data publikacji:
    2020
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    aluminum alloy
    Al-Mg cast alloy
    three-point bending loading
    fatigue
    fracture surface
    Opis:
    The article will be focused on analysis of properties of aluminum alloy for the casting of type Al-Mg. As an experimental material was used aluminum alloy EN AC 51200, supplied in a cast state without a heat treatment. It was produced by the continuous casting method. Experiments deal with microstructural material analysis, fractographic analysis, mechanical and fatigue tests. The microstructure of the testing sample was examined using an optical microscope Neophot 32. Fatigue properties of aluminum alloy was tested by three-point bending cyclic loading. The fracture surface of the testing sample was examined using scanning electron microscopy (SEM), where sample was observed on various stages of the fatigue process, its characteristics and differences of fracture surfaces.
    Źródło:
    Archives of Metallurgy and Materials; 2020, 65, 4; 1437-1445
    1733-3490
    Pojawia się w:
    Archives of Metallurgy and Materials
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    The Role of Microstructure on the Corrosion Behaviour of as cast AlCu4MgSi and MgAl2Si Alloys
    Autorzy:
    Lachowicz, M. M.
    Jasionowski, R.
    Powiązania:
    https://bibliotekanauki.pl/articles/381379.pdf
    Data publikacji:
    2018
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    metallography
    corrosion resistance
    aluminum alloy
    magnesium alloy
    Al-Cu-Mg-Si alloy
    Mg-Al-Si alloy
    metalografia
    odporność korozyjna
    stop aluminium
    stop magnezu
    stop Al-Cu-Mg-Si
    stop Mg-Al-Si
    Opis:
    In this work, the effect of the microstructure on corrosion behavior of selected Mg- and Al-based as cast alloys, was evaluated. The electrochemical examinations were carried out, and then a morphology of corrosion products formed due to local polarization on materials surface, was analyzed. It was documented that the presence of Mg2Si phase plays an important role in the corrosion course of Mg-based alloy. A selective etching was observed in sites of Mg2Si precipitates having “Chinese script”- like morphology. Analogous situation was found for Al-based alloy, where the key role was played by cathodic θ-CuAl2 phase.
    Źródło:
    Archives of Foundry Engineering; 2018, 18, 2; 125-130
    1897-3310
    2299-2944
    Pojawia się w:
    Archives of Foundry Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Three Dimensional Morphology of β-Al5FeSi Intermetallics in AlSi Alloys
    Autorzy:
    Mikołajczak, P.
    Ratke, L.
    Powiązania:
    https://bibliotekanauki.pl/articles/383272.pdf
    Data publikacji:
    2015
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    aluminum alloy
    intermetallics
    β-Al5FeSi
    X-ray tomography
    morphology
    solidification
    stop aluminium
    intermetalik
    tomografia rentgenowska
    Opis:
    Iron is the most common and detrimental impurity in casting alloys and has been associated with many defects. The main consequence of the presence or adding of iron to AlSi alloys is the formation Fe-rich intermetallics with especially deleterious β-Al5FeSi. β-Al5FeSi phases are most often called needles on 2D micro sections, whilst platelets in 3D geometry. The x-ray tomography results have demonstrated Fe-rich phases with shapes different from simple forms such as needles or platelets and presented bent and branched phases. β grown as complicated structure of bent and branched intermetallics can decrease feeding ability, strengthen pores nucleation and eutectic colonies nucleation leading to lower permeability of mushy zone and porosity in the castings.
    Źródło:
    Archives of Foundry Engineering; 2015, 15, 1; 47-50
    1897-3310
    2299-2944
    Pojawia się w:
    Archives of Foundry Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    X-ray tomography investigation of Fe-rich intermetallics in AlSi alloys
    Autorzy:
    Mikołajczak, P.
    Ratke, L.
    Powiązania:
    https://bibliotekanauki.pl/articles/381463.pdf
    Data publikacji:
    2013
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    aluminum alloy
    intermetallics
    β-Al5FeSi
    X-ray tomography
    melt flow
    stop aluminium
    związek międzymetaliczny
    tomografia rentgenowska
    szybkość przepływu
    Opis:
    Iron exists as a common impurity element in AlSi foundry alloys. The main consequence of the presence or adding of iron to AlSi alloys is the formation Fe-rich intermetallics with especially deleterious β-Al5FeSi. This work aims to identify the role of fluid flow on the microstructure and intermetallics in Al-9 wt.% Si-0.2/0.5/1.0 wt.% Fe alloys directionally solidified under defined thermal and fluid flow conditions and extensively uses 3D x-ray tomography to get a better insight into their morphology and formation. The results have revealed the growth of larger and more dense β-Al5FeSi intermetallics in the specimen centre as an effect of forced flow. The reconstructions confirmed that the course of number density at the specimen cross section increases from the specimen edge to its centre.
    Źródło:
    Archives of Foundry Engineering; 2013, 13, 4; 79-82
    1897-3310
    2299-2944
    Pojawia się w:
    Archives of Foundry Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Thermodynamic Assessment of Mushy Zone in Directional Solidification
    Autorzy:
    Mikołajczak, P.
    Ratke, L.
    Powiązania:
    https://bibliotekanauki.pl/articles/380005.pdf
    Data publikacji:
    2015
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    aluminum alloy
    directional solidification
    mushy zone
    CALPHAD technique
    Fe intermetallics
    β-Al5FeSi
    stop aluminium
    krzepnięcie kierunkowe
    strefa półciekła
    technika CALPHAD
    Opis:
    Solidification of AlSiFe alloys was studied using a directional solidification facility and the CALPHAD technique was applied to calculate phase diagrams and to predict occurring phases. The specimens solidified by electromagnetic stirring showed segregation across, and the measured chemical compositions were transferred into phase diagrams. The ternary phase diagrams presented different solidification paths caused by segregation in each selected specimen. The property diagrams showed modification in the sequence and precipitation temperature of the phases. It is proposed in the study to use thermodynamic calculations with Thermo-Calc which enables us to visualize the mushy zone in directional solidification. 2D maps based on property diagrams show a mushy zone with a liquid channel in the AlSi7Fe1.0 specimen center, where significant mass fraction (33%) of β-Al5FeSi phases may precipitate before α-Al dendrites form. Otherwise liquid channel occurred almost empty of β in AlSi7Fe0.5 specimen and completely without β in AlSi9Fe0.2. The property diagrams revealed also possible formation of α–Al8Fe2Si phases.
    Źródło:
    Archives of Foundry Engineering; 2015, 15, 4; 101-109
    1897-3310
    2299-2944
    Pojawia się w:
    Archives of Foundry Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-7 z 7

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