A constitutive model for the formation of martensite in austenitic steels under large strain plasticity
Författare
Summary, in English
A constitutive model for diffusionless phase transitions in elastoplastic materials undergoing large deformations is developed. The model takes basic thermodynamic relations as its starting point and the phase transition is treated through an internal variable (the phase fractions) approach. The usual yield potential is used together with a transformation potential to describe the evolution of the new phase. A numerical implementation of the model is presented, along with the derivation of a consistent algorithmic tangent modulus. Simulations based on the presented model are shown to agree well with experimental findings. The proposed model provides a robust tool suitable for large-scale simulations of phase transformations in austenitic steels undergoingz extensive deformations, as is demonstrated in simulations of the necking of a bar under tensile loading and also in simulations of a cup deep-drawing process.
Avdelning/ar
Publiceringsår
2007
Språk
Engelska
Sidor
1213-1239
Publikation/Tidskrift/Serie
International Journal of Plasticity
Volym
23
Issue
7
Fulltext
- Available as PDF - 415 kB
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Dokumenttyp
Artikel i tidskrift
Förlag
Elsevier
Ämne
- Mechanical Engineering
Nyckelord
- constitutive model
- large strain plasticity
- phase transformation
Status
Published
ISBN/ISSN/Övrigt
- ISSN: 0749-6419