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Dual-phase steels exhibit good mechanical properties due to a microstructure of strong martensitic inclusions embedded in a ductile ferritic matrix. This work presents a two-scale model for the underlying work-hardening effects; such as the distinctly different hardening rates observed for high-strength dual-phase steels. The model is based on geometrically necessary dislocations and comprises the average microstructural morphology as well as a direct interaction between the constituents.

two-scale model --- Kompositwerkstoffdual-phase steel --- composite --- material modelling --- dislocation mechanism --- Zweiskalenmodell --- Versetzungsmechanismen --- Dualphasenstahl --- Materialmodellierung