With the increasing demand for safety, energy saving and emission reduction, Advanced High Strength Steels (AHSS) have become very attractive materials for automobile makers. The usage of AHSS materials is projected to grow significantly in the next 5-10 years with new safety and fuel economy regulations. These new materials have significant manufacturing challenges, particularly for welding and stamping. Welding of AHSS remains one of the technical challenges in the successful application of AHSS in automobile structures, especially when durability of the welded structures is required.In this study, 2.0 mm uncoated DP600 and 2.0 mm uncoated boron (heat treated) steel lap joint configuration was investigated. Metallurgical properties of the DP600 to boron steel dissimilar steel lap joints were evaluated using optical microscopy. Static and fatigue tests were conducted on these joints. The effects of materials stack-ups and microhardness distribution along the tensile stress flow direction of the joints on fatigue performance defined by fatigue life as well as crack initiation site and propagation path were analyzed. It was found that for the DP600 and boron steel dissimilar joint, fatigue life of the joint is better when boron steel is on the top of the joint. Static strength of the joint is not sensitive to joint stack ups.


    Access

    Check access

    Check availability in my library

    Order at Subito €


    Export, share and cite



    Title :

    Effect of Materials Stack-ups and Microhardness Distribution on Fatigue Performance of DP600 and Boron Steel GMAW Lap Joint


    Additional title:

    Sae Technical Papers



    Conference:

    SAE World Congress & Exhibition ; 2007



    Publication date :

    2007-04-16




    Type of media :

    Conference paper


    Type of material :

    Print


    Language :

    English




    Effect of Materials Stack-ups and Microhardness Distribution on Fatigue Performance of DP600 and Boron Steel 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

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


    2007-01-0634 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