• Corpus ID: 201742595

DUAL PHASE STEELS FOR AUTO BODY: DESIGN, FORMING AND WELDING ASPECTS

@inproceedings{Carlsson2005DUALPS,
  title={DUAL PHASE STEELS FOR AUTO BODY: DESIGN, FORMING AND WELDING ASPECTS},
  author={Bj{\"o}rn Carlsson and Joachim Larsson},
  year={2005}
}

• B. Carlsson, J. Larsson
• Published 2005
• Materials Science

There is an obvious trend of increasing material strength in the BIW. The good combination of strength, formability and weldability of DP steels provides a possibility to reduce weight and improve crash performance. Necessary considerations regarding strength, energy absorption and fatigue are outlined in this paper in order to serve as a help for obtaining the best design solutions. High strength DP steels have superior formability when compared to microalloyed steels of the same strength, but inferior formability when compared to deep drawing steels. This can lead to design problems for the engineer who only has experience in mild stel constructions. In order to identify the strengths and limits in terms of formability, results from several formability tests are presented and compared to deep drawing steel. Dual phase steels can be welded with all conventional welding methods currently used in the automotive industry (resistance spot welding, laser welding, arc welding). In resistance spot welding conventional single pulse welding can be used. Best results are here achieved with increased electrode forces and longer weld times.