Multi-scale modelling of mechanical behavior of dual-phase steels based on realistic microstructure

© 2016, Editorial Board of Journal of Plasticity Engineering. All right reserved. The finite element modelling for realistic microstructure was conducted for dual-phase steels containing different chemical components and martensite volume fractions. Macroscale materials properties were statistically represented by Representative Volume Element (RVE) based on selected microstructures. To describe the flow behavior of ferrite and martensite phases,a dislocation based Bailey-Hirsch model was used considering the effects of alloy components and grain sizes. The uniaxial tensile of RVE was simulated using ABAQUS software.Results show that the multi-scale model well predicts the macro mechanical behaviors of dual-phase steels,and reasonably reveals the inhomogeneous stress-strain development in micro-scale.