Journal
MATERIALS LETTERS
Volume 282, Issue -, Pages -Publisher
ELSEVIER
DOI: 10.1016/j.matlet.2020.128691
Keywords
Metals and alloys; Deformation and fracture; Electron microscopy; Deformation twinning; Microstructure
Funding
- Department of Science and Technology, Government of India [CRG/2019/000858]
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Microstructure analysis of a Fe-25Mn-2Al-0.1C steel under uniaxial tension showed a gradually decreasing three-stage strain hardening behavior. Deformation twinning and dislocations cells were observed near failure strain, with dislocations seeming to play a more dominant role in strain hardening than twinning.
Microstructure of a Fe-25Mn-2Al-0.1C steel studied under uniaxial tension revealed a gradually decreasing three-stage strain hardening behavior. Early deformation microstructure comprised of dislocations configurations; like Taylor lattice and stair-rod dislocations. Deformation twinning nucleated in regions lacking homogenous dislocation substructure. Dislocations cells and fine twin bundles were observed near failure strain. The strain hardening was a concomitant effect of deformation twins and dislocation substructure, while the contribution of dislocations seems to overwhelm the contribution from twinning. (C) 2020 Elsevier B.V. All rights reserved.
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