This study was performed to evaluate basic characteristics of electron beam weldability for high strength Al alloys. The Al alloys used were non-heat treatable A5083-0 and heattreatable A6061-T6, and A7075-T6. The principal welding process parameters, such as accelerating voltage, beam current, welding speed and chamber pressure were investigated. The dimension and microstructure of welds were evaluated with OLM, and SEM (EDAX). In addition, weldability variation (cracking and porosity formation) due to process parameters was also evaluated. The EBW machine used for the welding development has a maximum operating voltage of 150 kV with a beam current of 100 mA, giving a maximum output power of 15 kW. Welds had many discontinuities such as cracks, cold shut, root porosity, and spikes. The tendency to form weld discontinuities was strongly dependent upon the EB process parameters and chemistry. Although three Al alloys were welded under the same conditions, alloying elements had an important effect on the dimension of the weld and weldability. A6061-T6 showed lower depth than the others. The variation of the weld depth was found to be sensitive to the vaporization tendency of the alloying elements. Si, which is the major element of A6061-T6, was more difficult to vaporize than other elements (such as Al, Mg, and Zn).


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    Titel :

    A study on the electron beam weldability of A5083, A6061, A7075 Al alloys for the transportation applications


    Weitere Titelangaben:

    Untersuchung der Elektronenstrahlschweißbarkeit der Al-Legierungen A5083, A6061, A7075 für Transportanwendungen
    Titel koreanisch


    Beteiligte:
    Kim, Sung-Wook (Autor:in) / Kim, Sook-Whan (Autor:in) / Lee, Chang-Hee (Autor:in)


    Erscheinungsdatum :

    1998


    Format / Umfang :

    7 Seiten, 8 Bilder, 3 Tabellen, 20 Quellen



    Medientyp :

    Aufsatz (Zeitschrift)


    Format :

    Print


    Sprache :

    Koreanisch




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