Dual Phase Steels Magnetism Modeling – DPS-MMOD

With the need to reduce carbon dioxide emissions, the trend is to make lighter auto bodies, yet without sacrificing their aptitude to protect car passengers in case of accidents. Steel manufacturers such as ArcelorMittal are currently developing a new generation of flat carbon steels, especially for automotive applications. However these steels are more exposed, in terms of properties consistency, to process variations than other conventional flat carbon steels. Therefore, adequate measurement tools are required to at least check the production scatter and control it. The objective of this project is to predict qualitatively, and possibly quantitatively, the magnetic response to various parameters of the microstructure of the industrial dual phase steels. For instance: The sensitivity to the perturbation parameters that go along the on-line measurement, and especially the effect of an applied tension or of zinc coating variations; the sensitivity of the elongation resulting from temper rolling; and the sensitivity to the presence of band-type microstructures. The main stages of the modeling will be to first link microstructure and magnetism, using finite elements models in 3D, with the integration of the magneto-mechanic coupling, then to model a measuring device so-called 3MA and link the modifications of the hysteretic cycles, brought forth by the change of microstructure, to the output signal of these devices. This project will allow for exploring the link between microstructure and magnetism and develop a new software: SIVIMM3D.