A macroscopic model to simulate the mechanically induced martensitic transformation in metastable austenitic stainless steels

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Abstract

Mechanically induced martensitic transformation and the associated transformation plasticity phenomena in austenitic stainless steels are studied. The mechanisms responsible for the transformation are investigated and put into perspective based on experimental evidence. The stress and strain partitioning into the austenite and martensite phases are formulated using a mean-field homogenization approach. At this intermediate length-scale the average stress in the austenite phase is computed and utilized to compute the mechanical driving force resolved in the material. The amount of transformation and the transformation plasticity is derived as a function of the driving force. The mechanical response of the material is obtained by combining the homogenization and the transformation models. The model is verified by mechanical tests under biaxial loading conditions during which different transformation rates are observed. As a final verification of the model, a bending test is used which manifests the stress-state dependency of the transformation.
Original languageUndefined
Pages (from-to)4409-4419
Number of pages11
JournalActa materialia
Volume60
Issue number11
DOIs
Publication statusPublished - 2012

Keywords

  • METIS-285991
  • Onderzoek van algemene industriele aardMechanical engineering and technology
  • IR-80527

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