A comparison of viscoplastic intermediate approaches for deformation texture evolution in face-centered cubic polycrystals

S. M'Guil, S. Ahzi, H. Youssef, M. Baniassadi, J. J. Gracio

Research output: Contribution to journalArticle

16 Citations (Scopus)

Abstract

We present a comparison between two intermediate viscoplastic approaches: the self-consistent approach and the φ{symbol}-model for the texture development in face-centered cubic polycrystals. In these models, the interactions between a grain and its surroundings are taken into account in different ways. We performed different tests to simulate axisymmetric tension/compression and plane-strain compression for different values of the parameter φ{symbol} and for different formulations of the self-consistent model. Predicted results (stress-strain, texture, slip activity, local stress and strain rate deviations) are compared and conclusions are drawn. The φ{symbol}-model allows for fairly good predictions, in comparison to existing experimental results, while it is much easier to formulate and to implement numerically. The φ{symbol}-model is also able to predict texture transition from the copper type to the brass type. Using the same boundary conditions and spherical grains, the self-consistent model is unable to predict this texture transition and only a copper type texture is obtained.

Original languageEnglish
Pages (from-to)2496-2508
Number of pages13
JournalActa Materialia
Volume57
Issue number8
DOIs
Publication statusPublished - 1 May 2009

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Keywords

  • Crystal plasticity
  • Micromechanics
  • Self-consistent model
  • Texture
  • Viscoplastic φ{symbol}-model

ASJC Scopus subject areas

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

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