Forming Potential of Current Dual-Phase Steel Developments with Strengths of 800 MPa

Modern car bodies are constantly relying on higher proportions of high- and ultra-high-strength steels. In the past, the increase in material strengths led to a conflict regarding the complexity of component geometries. Limits of material formability were reached, and compromises had to be made in part design. By integrating application-oriented problems into the material development, these limits are expanded with respect to the given requirements. Within the present study, for three dual-phase steels with a tensile strength of 800 MPa, practical laboratory tests are presented and their benefits in component manufacture are discussed. In particular, the material ductility has an essential role for the forming process