Modelling the material behaviour of metastable stainless

K. Datta, H.J.M. Geijselaers, J. Post, J. Beyer, J. Huetink

Research output: Chapter in Book/Report/Conference proceedingConference contributionAcademicpeer-review

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Abstract

Metastable austenitic stainless steels are designed to be thermodynamically unstable such that deformation even at room temperatures can bring about a change in the phase of face centred cubic austenite to either hexagonal close packed martensite and/or to body centred cubic martensite. This solid state phase change is a function of the strain path, strain, strain rate and temperature. A set of carefully designed experiments is conducted in the pure states of shear, compression and tension under varying temperature and strain rate. The fraction of the growing martensite phase is recorded with the help of a magnetic sensor attached to the mechanical tester. These data are then cast in a general form of constitutive equation and the transformation equations are derived from Olson-Cohen type functions. The set of equations, thus generated are further used to define an equivalent plastic stress and strain that are used to do finite element calculations for large strain forming of the metal sheets. The accuracy of the constitutive equation is validated by experiments.
Original languageEnglish
Title of host publicationMaterials processing and design: modeling, simulation and applications
Subtitle of host publicationNUMIFORM '07 : proceedings of the 9th International Conference on Numerical Methods in Industrial Forming Processes, Porto, Portugal, 17-21 June, 2007
EditorsJ.M.A. César de Sá, Abel D. Santos
Place of PublicationMelville, NY
PublisherAmerican Institute of Physics
Pages655-660
Number of pages6
ISBN (Electronic)978-0-7354-0416-8
ISBN (Print)978-0-7354-0415-1
DOIs
Publication statusPublished - 2007
Event9th International Conference on Numerical Methods in Industrial Forming Processes, NUMIFORM 2007 - Porto, Portugal
Duration: 17 Jun 200721 Jun 2007
Conference number: 9

Publication series

NameAIP Conference Proceedings
PublisherAIP
Number1
Volume908
ISSN (Print)0094-243X

Conference

Conference9th International Conference on Numerical Methods in Industrial Forming Processes, NUMIFORM 2007
Abbreviated titleNUMIFORM
CountryPortugal
CityPorto
Period17/06/0721/06/07

Keywords

  • Stainless Steel
  • Austenite
  • Martensite
  • Finite Element
  • Constitutive Equations

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    Datta, K., Geijselaers, H. J. M., Post, J., Beyer, J., & Huetink, J. (2007). Modelling the material behaviour of metastable stainless. In J. M. A. César de Sá, & A. D. Santos (Eds.), Materials processing and design: modeling, simulation and applications: NUMIFORM '07 : proceedings of the 9th International Conference on Numerical Methods in Industrial Forming Processes, Porto, Portugal, 17-21 June, 2007 (pp. 655-660). (AIP Conference Proceedings; Vol. 908, No. 1). Melville, NY: American Institute of Physics. https://doi.org/10.1063/1.2740885