Abstract
In the present work, peculiarities of the macroscopic, initial flow behavior of ferritic-martensitic dual-phase steels and their causes are discussed. For this purpose, results of continuum-micromechanical finite-element simulations on model microstructures are presented.During production of dual-phase steels, a portion of their microstructure, i.e. austenite transforms to martensite and thereby expands. This causes “transformation induced” residual stresses and plastic strains in their microstructure. These quantities are identified to govern the initial flow behavior of these steels.
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