Effect of the loading mode on the evolution of the deformation mechanisms in randomly textured magnesium polycrystals - Comparison of experimental and modeling results

K. Máthis, G. Csiszár, J. Čapek, J. Gubicza, B. Clausen, P. Lukáš, A. Vinogradov, S. R. Agnew

Research output: Contribution to journalArticle

54 Citations (Scopus)

Abstract

A detailed analysis of the loading mode dependence of the deformation mechanisms in randomly textured cast magnesium is presented. An elasto-plastic self-consistent model (EPSC) is used to model the dislocation slip and twinning activity, respectively. The results are quantitatively compared with experimental data obtained by in-situ neutron diffraction (ND) and acoustic emission (AE). Both EPSC calculations and ND line profile analysis show an increased activity of prismatic slip with increasing strain and a loading mode dependence of the activation of the second-order pyramidal slip. The AE measurements and the modeling indicate a difference in the number of nucleated twin variants and the twinned volume in tension and compression.

Original languageEnglish
Pages (from-to)127-150
Number of pages24
JournalInternational Journal of Plasticity
Volume72
DOIs
Publication statusPublished - Jun 15 2015

Keywords

  • A. Twinning
  • B. Crystal plasticity
  • B. Polycrystalline material
  • C. Nondestructive evaluation

ASJC Scopus subject areas

  • Materials Science(all)
  • Mechanics of Materials
  • Mechanical Engineering

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