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

Saleh, Ahmed A. and Wen, Wei and Pereloma, Elena V. and McCormack, Scott J. and Tomé, Carlos N. and Gazder, Azdiar A. (2019) Experimental and Self-Consistent Modeling Study of De-twinning in a Twinning-Induced Plasticity Steel. JOM, 71 (4). pp. 1396-1403. ISSN 1047-4838

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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.

Item Type:
Journal Article
Journal or Publication Title:
JOM
Uncontrolled Keywords:
/dk/atira/pure/subjectarea/asjc/2200
Subjects:
ID Code:
134517
Deposited By:
Deposited On:
03 Mar 2020 11:45
Refereed?:
Yes
Published?:
Published
Last Modified:
16 Sep 2020 05:23