A model for TRIP steel constitutive behaviour

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A constitutive model is developed for TRIP steel. This is a steel which contains three or four different phases in its microstructure. One of the phases in TRIP steels is metastable austenite (Retained Austenite) which transforms to martensite upon deformation. The accompanying transformation strain and the increase in hardness provide excellent formability characteristics. The phase transformation depends on the stress in the austenite, which is not equal to the overall stress. An estimate of the local stress in the austenite is obtained by homogenization of the response of the phases using a Mean-Field homogenization method. Overall stress strain results as well as stress strain results for individual phases are compared to measurements found in literature. The model can be used in finite element simulations of forming processes.
Original languageEnglish
Title of host publicationThe 14th International Conference on Material Forming ESAFORM 2011 Proceedings
EditorsG Menari
Place of PublicationBelfast
PublisherAmerican Institute of Physics
Number of pages5
Publication statusPublished - 2011
EventESAFORM 2011: 14th International Conference on Material Forming - Queen's University Belfast, Belfast, United Kingdom
Duration: 27 Apr 201129 Apr 2011
Conference number: 14

Publication series

NameAIP Conference proceedings
PublisherAmerican Institute of Physics


ConferenceESAFORM 2011
Abbreviated titleESAFORM
CountryUnited Kingdom


  • IR-76231
  • METIS-272419

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