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Experimental and Self-Consistent Modeling Study of De-twinning in a Twinning-Induced Plasticity Steel

Research output: Contribution to journalJournal article

Published
  • Ahmed A. Saleh
  • Wei Wen
  • Elena V. Pereloma
  • Scott J. McCormack
  • Carlos N. Tomé
  • Azdiar A. Gazder
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<mark>Journal publication date</mark>1/04/2019
<mark>Journal</mark>JOM
Issue number4
Volume71
Number of pages8
Pages (from-to)1396-1403
Publication StatusPublished
Early online date20/02/19
<mark>Original language</mark>English

Abstract

The effect of compression–tension loading on the microstructure evolution in a fully annealed Fe–24Mn–3Al–2Si–1Ni–0.06C twinning-induced plasticity steel has been investigated. Electron back-scattering diffraction was used to track a region of interest at true strains of 0 (initial), − 0.09 (after forward compression loading), and 0.04 (after reverse tension loading). All deformation twins detected after forward compression loading were found to de-twin upon subsequent reverse tension loading, likely due to the reverse glide of partial dislocations bounding the twins. The reverse loading behavior, including the twinning and de-twinning processes, was successfully simulated using a recently modified dislocation-based hardening model embedded in the visco-plastic self-consistent polycrystal framework, taking into account the dislocation accumulation/annihilation, as well as the twin barrier and back-stress effects.