A new intermediate model for polycrystalline viscoplastic deformation and texture evolution

Said Ahzi, Siham M'Guil

Research output: Contribution to journalArticle

30 Citations (Scopus)

Abstract

In this paper, we propose a model for large viscoplastic deformation of polycrystalline materials called φ{symbol}-model. The proposed interaction law is based on a new non-linear intermediate approach. In this formulation, we propose to minimize an error function which combines the deviations of the local fields from the corresponding macroscopic ones. A scalar weight parameter was introduced to span the entire solution domain between the upper and lower bound approaches. We applied this approach to predict the stress-strain response and texture evolution in face-centered cubic metals under tension, compression and plane strain compression. We analyzed the effect of the weight parameter in terms of slip activity, stress-strain responses and texture transitions such as copper-type vs. brass-type textures. A comparison between the self-consistent model (VPSC code) and the φ{symbol}-model is also performed in this paper. Some possible links between the φ{symbol} parameter and microstructural features are also discussed.

Original languageEnglish
Pages (from-to)5359-5369
Number of pages11
JournalActa Materialia
Volume56
Issue number19
DOIs
Publication statusPublished - Nov 2008
Externally publishedYes

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Textures
Polycrystalline materials
Brass
Copper
Metals

Keywords

  • Crystal plasticity
  • Intermediate modeling
  • Micromechanical modeling
  • Texture

ASJC Scopus subject areas

  • Ceramics and Composites
  • Electronic, Optical and Magnetic Materials
  • Metals and Alloys
  • Polymers and Plastics

Cite this

A new intermediate model for polycrystalline viscoplastic deformation and texture evolution. / Ahzi, Said; M'Guil, Siham.

In: Acta Materialia, Vol. 56, No. 19, 11.2008, p. 5359-5369.

Research output: Contribution to journalArticle

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