Size and orientation effects in partial dislocation-mediated deformation of twinning-induced plasticity steel micro-pillars
SCIE
SCOPUS
- Title
- Size and orientation effects in partial dislocation-mediated deformation of twinning-induced plasticity steel micro-pillars
- Authors
- Choi, WS; De Cooman, BC; Sandlobes, S; Raabe, D
- Date Issued
- 2015-10-01
- Publisher
- PERGAMON-ELSEVIER SCIENCE LTD
- Abstract
- Bulk and micro-pillar single crystals were used to investigate the twinning-induced plasticity mechanism in austenitic Fe-22 wt%Mn-0.6 wt%C TWIP steel. Compression of micro-pillars oriented either for deformation-induced twinning or for perfect dislocation glide was carried out for pillars with diameters in the range of 600 nm to 4 mu m. The same size dependence of the critical resolved shear stress was observed for both orientations. The critical micro-pillar diameter for size-independent plasticity was approximately 7.6 mu m. Partial dislocation-mediated formation of twins and epsilon-martensite was observed in micro-pillars oriented for twinning by transmission electron microscopy. The elastic-plastic transition in micro-pillars oriented for deformation twinning did not involve twinning, and dislocation-dislocation interactions were a necessary precondition for twin formation. (C) 2015 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.
- URI
- https://oasis.postech.ac.kr/handle/2014.oak/36335
- DOI
- 10.1016/J.ACTAMAT.2015.06.065
- ISSN
- 1359-6454
- Article Type
- Article
- Citation
- ACTA MATERIALIA, vol. 98, page. 391 - 404, 2015-10-01
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- There are no files associated with this item.
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