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Wyszukujesz frazę "aluminum alloys welding" wg kryterium: Wszystkie pola

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    Wyświetlanie 1-9 z 9
    Tytuł:
    Ultrasonic-vibration assisted arc-welding of aluminum alloys
    Autorzy:
    Krajewski, A.
    Włosiński, W.
    Chmielewski, T.
    Kołodziejczak, P.
    Powiązania:
    https://bibliotekanauki.pl/articles/201701.pdf
    Data publikacji:
    2012
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    ultrasonic vibrations
    MIG/TIG welding
    aluminum alloys
    structure
    microhardness
    Opis:
    The structure and hardness of the surface-welds and fusion-welds made on a 2017A aluminum alloy waveguide using the MIG and TIG methods with and without the participation of ultrasonic vibrations were examined. Cross-sections of the fusions and surface-welds thus obtained were observed in a microscope and the hardness distributions were determined. The aim of the study was to analyze the effects of the ultrasonic vibrations applied to the melted metal pool by a vibrating substrate which in our experiments was a waveguide. The interactions of the ultrasonic vibrations with the molten metal during its solidification and also with the heat-affected zone were examined at various phases of the vibration wave. The ultrasonic vibrations affected the structure of a weld. These changes are strongly depended on the wave phase.
    Źródło:
    Bulletin of the Polish Academy of Sciences. Technical Sciences; 2012, 60, 4; 841-852
    0239-7528
    Pojawia się w:
    Bulletin of the Polish Academy of Sciences. Technical Sciences
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Characteristics of AlSi9mg/2017A Aluminum Alloys Friction Stir Welded with Offset Welding Line and Root-Side Heating
    Charakterystyka stopów aluminium AlSi9mg/2017A zgrzewanych metodą Friction Stir Welding z przesunięcem linii zgrzewania i dodatkowym źródłem ciepła od strony grani
    Autorzy:
    Mroczka, K.
    Powiązania:
    https://bibliotekanauki.pl/articles/350928.pdf
    Data publikacji:
    2014
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    FSW
    aluminium alloys
    AlSi9Mg
    2017A
    stopy aluminium
    Opis:
    Welding of materials differing significantly in terms of chemical composition and microstructure is one of the main advantages of the Friction Stir Welding method. This paper presents the results of welding of a cast AlSi9Mg (hypoeutectic silumin) and 2017A aluminum alloys. The welding was performed with a high linear velocity (over 1 m/min). The modification of the process consisted in offsetting the welding line toward the advancing side, and in on application of an additional heat source from the root side. The study of the macrostructure (with high resolution of the image) revealed the presence of defects in the weld, despite greater plasticity of the material results from raising the temperature. The analysis (by SEM, SEM-EDS) of constituent stable phases within the cast alloy, showed their considerable fragmentation, however to a various degree. The material above the weld nugget was not mixed and contained micro-defects that did not result from the welding. The hardness distribution within the weld nugget, reveals slight strengthening of the both cast and wrought alloys. A metastable state of the 2017A alloy was also documented, however, the alloy hardness increased within the weld nugget due to the natural aging. On the other hand, the hardness of the heat-affected zone in this alloy does not increase also due to the natural aging.
    Jedną z głównych zalet technologii FSW jest zdolność do spajania materiałów znacznie różniących się składem chemicznych. W artykule przedstawiono rezultaty zgrzewania stopów aluminium AlSi9Mg (silumin podeutektyczny) i 2017A. Zgrzewanie wykonano z dużą prędkością liniową (powyżej 1 m/min). Proces zgrzewania zmodyfikowano przesuwając linię zgrzewania w kierunku strony natarcia oraz stosując dodatkowe źródło ciepła od strony grani. Badania makrostruktury zgrzeiny wykazały obecność wad mimo zwiększonej plastyczności materiału podczas zgrzewania, w wyniku podwyższenia temperatury. Podczas zgrzewania FSW dochodzi do fragmentacji cząstek w obszarze działania narzędzia. Na podstawie badań SEM i SEM-EDS wykazano różny stopień fragmentacji wydzieleń w stopie AlSi9Mg. Badania wykazały ponadto ograniczoną intensywność mieszania materiału przez narzędzie w strefie nad jądrem zgrzeiny. W tym obszarze wystepują również niewielkich rozmiarów wady, niebędące efektem płynięcia materiału. Z kolei analizy rozkładów twardości na przekroju porzecznym zgrzeiny dowiodły niewielkiego umocnienia stopu odlewniczego. Natomiast stop 2017A, w obszarze jądra zgrzeiny, wykazał niestabilność mikrostruktury (bezposrednio po zgrzewaniu) oraz uległ umocnieniu w wyniku starzenia naturalnego. Starzeniu nie uległ obszar strefy wpływu ciepła.
    Źródło:
    Archives of Metallurgy and Materials; 2014, 59, 4; 1293-1299
    1733-3490
    Pojawia się w:
    Archives of Metallurgy and Materials
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Friction Stir Welding of Ultrathin AA2024-T3 Aluminum Sheets Using Ceramic Tool
    Autorzy:
    Myśliwiec, P.
    Śliwa, R. E.
    Ostrowski, R.
    Powiązania:
    https://bibliotekanauki.pl/articles/355870.pdf
    Data publikacji:
    2019
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    friction stir welding
    aluminum alloys
    ceramic tools
    FSW force measurements
    low-cycle fatigue test
    FSW joint durability
    Opis:
    The paper presents the results of research work on linear FSW (Friction Stir Welding) joining aluminum alloys AA2024-T3 of 0.5 mm in thickness. The study was conducted on properly adapted numerical controlled 3 axis milling machine using a ceramic tool and special designed fastening device. The tool dimensions have been estimated according to the algorithm shown in the literature [4]. All joints were made of end-to end (butt) configuration under different welding speed. The rotational speed of the tool and tool offset was constant. The effect of selected technological parameters on the quality of the joint was analyzed. Produced butt joint have been subjected to a static tensile testing to identify mechanical features of the materials of joints compared to parent materials. Measurements of micro hardness HV in the plastically formed stir zone of joint and in the parent material have been carried out. Axial and radial welding forces in the joining region were recorded during the tests and their dependency from the welding parameters was studied. Based on the results of strength tests the efficiency of joints for sheets of 0.5 mm in thicknesses oscillated up to 96% compared to the parent material. It has been found that for given parameters the correct, free of defects joints were obtained. The paper also presents the results of low-cycle fatigue tests of obtained FSW joints. The use of a ceramic tool in the FSW process allows to obtain welds with higher strength than conventional tools. The results suggests that FSW can be potentially applied to joining aluminum alloys.
    Źródło:
    Archives of Metallurgy and Materials; 2019, 64, 4; 1385-1394
    1733-3490
    Pojawia się w:
    Archives of Metallurgy and Materials
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Mechanical and microstructural properties of EN AW-6060 aluminum alloy joints produced by friction stir welding
    Autorzy:
    Küçükrendeci, I.
    Powiązania:
    https://bibliotekanauki.pl/articles/202032.pdf
    Data publikacji:
    2015
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    friction stir welding
    microstructure
    mechanical properties
    aluminum alloys
    spawanie
    tarcie
    mikrostruktury
    właściwości mechaniczne
    stopy aluminium
    Opis:
    In the study, the mechanical and microstructural properties of friction stir welded EN AW-6060 Aluminum Alloy plates were investigated. The friction stir welding (FSW) was conducted at tool rotational speeds of 900, 1250, and 1500 rpm and at welding speeds of 100, 150 and 180 mm/min. The effect of the tool rotational and welding speeds such properties was studied. The mechanical properties of the joints were evaluated by means of micro-hardness (HV) and tensile tests at room temperature. The tensile properties of the friction stir welded tensile specimens depend significantly on both the tool rotational and welding speeds. The microstructural evolution of the weld zone was analysed by optical observations of the weld zones.
    Źródło:
    Bulletin of the Polish Academy of Sciences. Technical Sciences; 2015, 63, 2; 475-478
    0239-7528
    Pojawia się w:
    Bulletin of the Polish Academy of Sciences. Technical Sciences
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Joint Formation and Mechanical Properties of 2060 Aluminum Alloy Refill Friction Stir Spot Welding Joint
    Autorzy:
    Shang, Zhen
    Zuo, Yingying
    Ji, Shude
    Wang, Yue
    Chai, Peng
    Powiązania:
    https://bibliotekanauki.pl/articles/2049424.pdf
    Data publikacji:
    2021
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    refill friction stir spot welding
    2060 aluminum alloys
    plunge depth
    defect characteristics
    mechanical properties
    Opis:
    Refill friction stir spot welding (RFSSW) was used to weld the 2060 aluminum alloy with 2 mm thickness. Joint formation, defect characteristics and mechanical properties were investigated. Results show that stir zone (SZ) is clarified into dynamic recrystallization zone (DRZ) and heat extruded zone (HEZ) due to different microstructural features. The size of void near the hook tip decreases with the increase of the plunge depth. Different hook morphologies are obtained under different plunge depths. The tensile-shear load of joint with the void defect initially decreases and then increases with increasing plunge depth. The mean loads of joints under different plunge depths are in the range of 5.1-5.8 kN. The void separates the hook from lap interface, so the cracks initiating from the hook propagate along the sleeve retreating path. The hook has a larger influence on the tensile-shear load of joint than void. All the tensile specimens present a shear-plug fracture mode.
    Źródło:
    Archives of Metallurgy and Materials; 2021, 66, 1; 153-161
    1733-3490
    Pojawia się w:
    Archives of Metallurgy and Materials
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    The Mechanism of Solid State Joining THA with AlMg3Mn Alloy
    Autorzy:
    Kaczorowski, M.
    Goroch, O.
    Krzyńska, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/381603.pdf
    Data publikacji:
    2014
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    friction welding
    tungsten heavy alloys
    aluminum alloys
    structure
    properties
    zgrzewanie
    stop wolframu
    stopy aluminium
    struktura
    właściwości
    Opis:
    The results of experimental study of solid state joining of tungsten heavy alloy (THA) with AlMg3Mn alloy are presented. The aim of these investigations was to study the mechanism of joining two extremely different materials used for military applications. The continuous rotary friction welding method was used in the experiment. The parameters of friction welding process i.e. friction load and friction time in whole studies were changed in the range 10 to 30kN and 0,5 to 10s respectively while forging load and time were constant and equals 50kN and 5s. The results presented here concerns only a small part whole studies which were described elsewhere. These are focused on the mechanism of joining which can be adhesive or diffusion controlled. The experiment included macro- and microstructure observations which were supplemented with SEM investigations. The goal of the last one was to reveal the character of fracture surface after tensile test and to looking for anticipated diffusion of aluminum into THA matrix. The results showed that joining of THA with AlMg2Mn alloy has mainly adhesive character, although the diffusion cannot be excluded.
    Źródło:
    Archives of Foundry Engineering; 2014, 14, 2; 37-42
    1897-3310
    2299-2944
    Pojawia się w:
    Archives of Foundry Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Natural Aging Behavior Of Friction Stir Welded Al-Zn-Mg-Cu Aluminum Alloys
    Starzenie naturalne złączy stopów aluminium Al-Zn-Mg-Cu wykonanych metodą zgrzewania tarciowego z mieszaniem materiału
    Autorzy:
    Kalemba, I.
    Kopyściański, M.
    Hamilton, C.
    Dymek, S.
    Powiązania:
    https://bibliotekanauki.pl/articles/356933.pdf
    Data publikacji:
    2015
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    friction stir welding
    natural aging
    aluminum alloys
    thermal analysis
    zgrzewanie tarciowe z mieszaniem
    naturalne starzenie
    stopy aluminium
    analiza termiczna
    Opis:
    The long term natural aging behavior of friction stir welded aluminum 7136-T76 and 7042 T6 extrusions was investigated. The microstructural characteristics and mechanical properties in the as-welded and six years naturally aged conditions were studied and correlated to a coupled thermal/material flow model of the joining process. Hardness profiles for the 7136 alloy taken along the mid-plane thickness of the workpiece displayed the characteristic W-shape. With natural aging, hardness recovery occurred on both sides of the weld, but the position of the hardness minima, particularly on the advancing side, shifted away from the weld centerline. The hardness profile for the 7042 alloy displayed U-shape in the as-welded condition and W-shape after natural aging. The hardness behavior upon natural aging correlated to the temperature profile developed during welding and the degree to which phase dissolution occurred in the regions adjacent to the stir zone.
    W artykule przedstawiono wyniki badań dotyczące długoterminowego starzenia naturalnego złączy stopów aluminium 7136-T76 i 7042-T6 wykonanych metodą zgrzewania tarciowego z mieszaniem materiału. Złącza w stanie po zgrzewaniu oraz po 6 latach starzenia naturalnego scharakteryzowano pod względem mikrostrukturalnym oraz mechanicznym. Wyniki badań skorelowano z modelem termicznym i modelem płynięcia materiału podczas zgrzewania. Profil twardości złącza stopu 7136 wykazuje charakterystyczny kształt litery „W”. Starzenie naturalne powoduje wzrost twardości, przy czym minimum twardości, szczególnie po stronie natarcia, odsuwa się od środka złącza. Profil twardości złącza stopu 7042 przyjmuje kształt litery „U” po zgrzewaniu i kształt litery „W” po starzeniu naturalnym. Takie zachowanie twardości po starzeniu naturalnym jest związane z temperaturą podczas procesu zgrzewania oraz stopniem, w jakim rozpuszczają się fazy w obszarach sąsiadujących ze strefą mieszania.
    Źródło:
    Archives of Metallurgy and Materials; 2015, 60, 2A; 875-879
    1733-3490
    Pojawia się w:
    Archives of Metallurgy and Materials
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    The Influence of Tool Geometry for Refill Friction Stir Spot Welding (RFSSW) on Weld Properties During Joining Thin Sheets of Aluminum Alloys
    Autorzy:
    Łogin, W.
    Śliwa, R. E.
    Ostrowski, R.
    Andres, J.
    Powiązania:
    https://bibliotekanauki.pl/articles/354218.pdf
    Data publikacji:
    2019
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    RFSSW
    joint strength
    material softening
    RFSSW tools
    Opis:
    The paper presents the results of research on the modification of the face geometry of the refill friction stir spot welding tool sleeve for welding thin aluminum sheets with an Alclad and an oxide anode coating. The analysis of the impact of such modification on the process perform (tool motion parameters, temperature) and microstructure as well as mechanical strength of the lap joints were analyzed. The tests were carried out using aluminum alloy 2024-T3 sheets with thickness 1.27 mm. For comparative purposes,joints were also made using plates without an Alclad and without anodized coating with using unmodified tool and modified toolswith developed 3 variants of face geometry. The samples with the joint were subjected to metallographic and strength tests. It has been shown that the use of modified geometry has a decisive influence on the performance of the process and the effect of softening and mixing of materials in the zone of point connection.
    Źródło:
    Archives of Metallurgy and Materials; 2019, 64, 3; 975-981
    1733-3490
    Pojawia się w:
    Archives of Metallurgy and Materials
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Effect of Welding Parameters and Metal Arrangement of the AA2024-T3 on the Quality and Strength of FSW Lap Joints for Joining Elements of Landing Gear Beam
    Autorzy:
    Myśłiwiec, P.
    Śliwa, R. E.
    Ostrowski, R.
    Bujny, M.
    Zwolak, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/356961.pdf
    Data publikacji:
    2020
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    FSW lap joints
    aluminum alloys
    landing gear beam
    low cycle fatigue test
    Opis:
    The paper presents the possibility of using FSW technology for joining elements of a landing gear beam of the M28 aircraft. The FSW process was performed on a 4-axis numerical machine under industrial conditions. However, before welding was carried out under industrial conditions, preliminary experimental tests were carried out under laboratory conditions. Preliminary research was carried out for AA2024-T3 aluminum sheets of 1 mm and 3 mm in thickness, joined in a lap configuration. The influence of technological and geometric parameters of the process on the quality and strength of the weld was examined. Sheet metal arrangement was analyzed. Tests were carried out for two configurations. The first of which with 1 mm sheet on the top and 3 mm sheet on the bottom and in reverse order. It has been shown that setting a thicker plate on the top gives a 40% better strength. The microhardness and microstructure of the weld were tested. During the laboratory tests, low-cycle fatigue tests of the FSW lap joint were performed. It has been shown that the FSW method can be an alternative to the riveting process in the production of aviation structure elements.
    Źródło:
    Archives of Metallurgy and Materials; 2020, 65, 3; 1203-1216
    1733-3490
    Pojawia się w:
    Archives of Metallurgy and Materials
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-9 z 9

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