Micromechanical modelling of bending under tension forming behaviour of dual phase steel 600

[Display omitted] •Using BUT modelling to investigate the forming behaviour of dual phase steel.•Both the macro-modelling and experimental validation of BUT were carried out.•A micro-modelling based on RVE was investigated linked to BUT model.•Both the macro properties and micro behaviours for DP600 were analysed. A micromechanical modelling based approach by means of a Representative Volume Element (RVE) was employed to predict the flow behaviour and plastic strain of DP600 steel, produced by WISCO. Macroscopic modelling of a classical Bending-Under-Tension (BUT) experiment was employed to acquire strain deformation, and thus the following microscopic modelling was implemented by considering the realistic microstructure morphology. Comparisons between macroscopic behaviour and microscopic behaviour, including strain distribution and stress distribution, were extracted for different boundary conditions of the BUT set-up. The micro–macro modelling approach increases the understanding of the steel microstructure, which will enable this microstructure to be tailored for different applications in automobile industry in the future.