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A constitutive model for the formation of martensite in austenitic steels under large strain plasticity

In English

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

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