Laser Welding Conditions to Improve Tensile Strength and Fatigue Strength of a Lap Joint in Aluminum Alloys

    Volume 35, Issue 4 (July 2007)

    ISSN: 0090-3973

    CODEN: JTEOAD

    Published Online: 4 January 2007

    Page Count: 8


    Kawamoto, Kyohei
    Graduate students, Graduate School of Engineering, Kyushu University, Nishi-ku, Fukuoka

    Yoshimitsu, Shintaro
    Graduate students, Graduate School of Engineering, Kyushu University, Nishi-ku, Fukuoka

    Noguchi, Hiroshi
    Associate Professor and Professor, Department of Mechanical Engineering Science, Faculty of Engineering, Kyushu University, Nishi-ku, Fukuoka

    Yoshimura, Tatsuhiko
    Associate Professor and Professor, Department of Mechanical Engineering Science, Faculty of Engineering, Kyushu University, Nishi-ku, Fukuoka

    (Received 23 December 2003; accepted 5 December 2006)

    Abstract

    This research shows a procedure for seeking a domain of conditions under which the tensile strength and fatigue strength are improved in lap joints of aluminum alloys made by laser welding. Laser welding parameters involve the following three factors: gap width, welding speed, and laser power. The following conditions were obtained in this research. (a) When searching for favorable welding conditions, the required work involves only observing the states around the weld-zone. (b) In order to improved the fatigue strength, it is necessary to prevent the generation of lack of fusion by the shortage of heat input and a crack near the toe of the weld due to the excess heat input. Using the results, the above-mentioned simple method is shown.


    Paper ID: JTE100077

    DOI: 10.1520/JTE100077

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    Author
    Title Laser Welding Conditions to Improve Tensile Strength and Fatigue Strength of a Lap Joint in Aluminum Alloys
    Symposium , 0000-00-00
    Committee E08