Abstract
Abstract For high strength low alloys, intercritical heat treatment processes are usually used to obtain the dual phase steel. In this work, a micro–macroscopic model was developed for describing the hardening and fracture behavior of such steels after the heat treatments. In the microscopic model, a description of flow curves was established based on a 2D representative volume element from a real microstructure, whereas in the macroscopic model, the Gurson–Tveergard–Needleman approach was used to simulate the failure process. Furthermore, the simulation flow curves and true stress–strain curves were compared with the experimental observations. The results demonstrate that such a multiscale model can accurately predict the work hardening and fracture behavior of steels after the intercritical heat treatments.
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