Micromodeling of a dual-phase steel using an idealized micrograph generated by Voronoi diagrams

Resumo

Dual phase (DP) steels are high strength steels used mainly in the production of vehicle bodywork,
currently about 74% of the structural components are manufactured in this type of material. These DP steels are
composed of a soft ferrite matrix with a hard, martensite phase. In this research, mechanical properties
characteristic of these materials are linked, establishing dependence between volume fractions of each phase and
simulations of the mechanical behavior in different situations are developed. Implementing a 2D bilinear plasticity
model from the synergy of three design programs, regions of the martensitic phase of the material were generated
in a 3D space. In the same way, these inclusions were parameterized and modeled together with a ferritic matrix.
Then, using FEM to simulate 3D micromodeling (RVE), stress-strain diagrams are obtained. Finally, the results
show deviations of 10% on average from the experimental values.