Abstract Banding in commercial dual-phase steels, such as banded ferrite and pearlite or martensite microstructures, is inherited from segregation during solidification continuously cast material, predominantly Mn segregation, subsequent rolling. The microstructures lead to anisotropic mechanical properties which generally undesirable. This paper presents an alloy design approach (termed “segre...

Ultra high strength steels are of enormous interest especially in the automotive industry due to their potential in realising light weight structures and improving the crash behaviour. However the poor formability of these steels limits their application for many parts in the car body. A solution to this limitation can be a local heat treatment using a laser beam to soften the material where a ...

In this paper, aspects of the two-scale simulation of dual-phase steels are considered. First, we present two-scale simulations applying a one-way coupling to a full thermo-elastoplastic model in order to study the emerging temperature field. We find that, for our purposes, the consideration of thermomechanics at the microscale is not necessary. Second, we present highly parallel fully-coupled ...

Two different dual phase steels were prepared from low carbon manganese steel after the elimination of the banding using the direct quenching (DQ) and the step quenching (SQ) procedures. Different heat treatments resulted in different martensite morphologies, microstructures and mechanical properties. The heat treatments were designed in such a way to obtain a 0.25 volume fraction of martensite...