High tensile steel, such as dual-phase steel consisting offerrite and martensite, is still widely used in several industries. From a research and development point of view, it is important to clarify the relationship between microstructure and macroscopic mechanical properties. In this study, samples of dual- or single-phase steel consisting of similar constituent phases were experimentally produced, and their tensile properties were obtained by material testing. These data were introduced into the microstructure model generated by an image-based modeling method using SEM observation imaging. Using this model, multiscale FE simulation based on homogenization elasto-plasticity theory was conducted, and validation was investigated by comparison with experimental results.
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