Constitutive behaviour of the metastable stainless steel: Sandvik Nanoflextm

J. Post, K. Datta, J. Huetink

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Abstract

This article presents a model to describe the constitutive behaviour of corrosion-resistant Sandvik steel NanoflexTM [1] during metal forming and hardening. This material is characterised by different phenomena. The material is metastable, which causes strain-induced transformation to take place during metal forming. Depending on the annealing conditions, the material also transforms isothermally [2, 3] (as opposed to a-thermal martensite). This transformation can also take place immediately after forming, as a result of the residual stresses present in the material. The martensite phase of this material can be aged [4]. Results of the various measurements on Sandvik NanoflexTM are shown. The measurements mainly involved tensile tests and upsetting tests, during which both isothermal transformation and strain-induced transformation were measured by inductive sensors[5] and they were afterwards examined. The hardening of the material and the increase in hardness during ageing was also examined. Finally, a constitutive model based on literature and the measurement are presented. This model describes the isothermal, stress-assisted transformation, strain-induced transformation, work hardening and ageing. The model has been set up in such a way that it can be simply implemented in a FEM code
Original languageEnglish
Title of host publicationMaterials processing and design : modeling, simulation and applications
Subtitle of host publicationNUMIFORM 2004 : proceedings of the 8th International Conference on Numerical Methods in Industrial Forming Processes
EditorsSomnath Chosh, Jose M. Castro, June K. Lee
Place of PublicationMelville, NY
PublisherAmerican Institute of Physics
Pages1670-1675
ISBN (Electronic)0-7354-0189-6
ISBN (Print)0-7354-0188-8
DOIs
Publication statusPublished - 13 Jun 2004
Event8th International Conference on Numerical Methods in Industrial Forming Processes, NUMIFORM 2004 - Columbus, United States
Duration: 13 Jun 200417 Jun 2004
Conference number: 8

Publication series

NameAIP Conference Proceedings
PublisherAIP
Volume712
ISSN (Print)0094-243X

Conference

Conference8th International Conference on Numerical Methods in Industrial Forming Processes, NUMIFORM 2004
Abbreviated titleNUMIFORM
CountryUnited States
CityColumbus
Period13/06/0417/06/04

Keywords

  • Materials forming
  • Educational assessment
  • Alloys
  • Metallurgy
  • Corrosion
  • Materials heat treatment Phase transitions

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  • Cite this

    Post, J., Datta, K., & Huetink, J. (2004). Constitutive behaviour of the metastable stainless steel: Sandvik Nanoflextm. In S. Chosh, J. M. Castro, & J. K. Lee (Eds.), Materials processing and design : modeling, simulation and applications: NUMIFORM 2004 : proceedings of the 8th International Conference on Numerical Methods in Industrial Forming Processes (pp. 1670-1675). (AIP Conference Proceedings; Vol. 712). Melville, NY: American Institute of Physics. https://doi.org/10.1063/1.1766769