Non-proportionality of strain and coupling effects on dislocation distribution and ductility in ferritic steel polycrystals

T. O. Erinosho, A. C F Cocks, F. P E Dunne

Research output: Chapter in Book/Report/Conference proceedingConference Contribution (Conference Proceeding)

Abstract

Non-proportionality of straining, initial texture and hardening have been investigated in a ferritic steel polycrystal within a crystal plasticity finite element framework. Two extreme forms of hardening are investigated; namely, isotropic latent-hardening and anisotropic self-hardening. Dislocation density evolutions on all independent slip systems have been calculated in order to investigate the establishment of dislocation distributions and evaluate their dependence on non-proportionality, hardening, texture and predicted ductility. The results show that non-proportionality effects are more pronounced under isotropic latenthardening as opposed to anisotropic self-hardening especially under non-proportional uniaxial strains.

Original languageEnglish
Title of host publicationComputational Methods for Coupled Problems in Science and Engineering V - A Conference Celebrating the 60th Birthday of Eugenio Onate, COUPLED PROBLEMS 2013
PublisherInternational Center for Numerical Methods in Engineering
Pages275-286
Number of pages12
ISBN (Print)9788494140761
Publication statusPublished - 2013
Event5th International Conference on Computational Methods for Coupled Problems in Science and Engineering, COUPLED PROBLEMS 2013 - Santa Eulalia, Ibiza Island, Spain
Duration: 17 Jun 201319 Jun 2013

Conference

Conference5th International Conference on Computational Methods for Coupled Problems in Science and Engineering, COUPLED PROBLEMS 2013
Country/TerritorySpain
CitySanta Eulalia, Ibiza Island
Period17/06/1319/06/13

Keywords

  • Dislocation distributions
  • Forming limits
  • Hardening
  • Necking
  • Non-proportionality
  • Strain localization
  • Texture

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