Typical automotive joints are lap, coach, butt and miter joints. In tubular joining applications, a coach joint is common when one tube is joined to another tube without the use of brackets. Various fusion joining processes are popular in joining coach joints. Common fusion joining processes are Gas Metal Arc Welding (GMAW), Laser and Laser Hybrid, and Gas Tungsten arc welding (GTAW). In this study, fusion welded 2.0 mm uncoated DP780 steel coach joints were investigated. Laser, Gas metal arc welding (GMAW), and laser hybrid (Laser + GMAW) welding processes were selected. Metallurgical properties of the DP780 fusion welds were evaluated using optical microscopy. Static and fatigue tests were conducted on these joints for all three joining processes. It was found that joint fit-up, type of welding process, and process parameters, especially travel speed, have significant impact on static and fatigue performance of the coach joints in this study. Failure location of static and fatigue tested coach joints will also be discussed.


    Access

    Check access

    Check availability in my library

    Order at Subito €


    Export, share and cite



    Title :

    Static and Fatigue Performance of Fusion Welded Uncoated DP780 Coach Joints


    Additional title:

    Sae Technical Papers



    Conference:

    SAE World Congress & Exhibition ; 2008



    Publication date :

    2008-04-14




    Type of media :

    Conference paper


    Type of material :

    Print


    Language :

    English




    Static and Fatigue Performance of Fusion Welded Uncoated DP780 Coach Joints

    Angotti, S. / Koganti, R. / Joaquin, A. et al. | British Library Conference Proceedings | 2008



    Effect of Weld Geometry and HAZ Softening on Fatigue Performance of DP780 GMAW Lap Joint

    Joaquin, Armando / Jiang, Chonghua (Cindy) / Koganti, Ramakrishna et al. | SAE Technical Papers | 2007


    Effect of Weld Geometry and HAZ Softening on Fatigue Performance of DP780 GMAW Lap Joint

    Koganti, R. / Angotti, S. / Joaquin, A. et al. | British Library Conference Proceedings | 2007


    Effect of Materials Stack-ups on Fatigue Performance of DP780 and Aluminized Coated Boron Steel GMAW Lap Joint

    Koganti, R. / Angotti, S. / Joaquin, A. et al. | British Library Conference Proceedings | 2007