Characterization and modeling of void nucleation by interface decohesion in dual phase steels

In situ tensile tests have been carried out during X-ray microtomography imaging of dual phase steels. Void nucleation has been quantified as a function of strain and triaxiality using the obtained three-dimensional images. The Argon criterion of decohesion has been used in a model for nucleation in the case where martensite plays the role of inclusions. This criterion has been modified to include the local stress field and the effect of kinematic hardening present in such a heterogeneous material. (C) 2010 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.