Micro-plasticity of medium Mn austenitic steel: Perfect dislocation plasticity and deformation twinning
SCIE
SCOPUS
- Title
- Micro-plasticity of medium Mn austenitic steel: Perfect dislocation plasticity and deformation twinning
- Authors
- Seo, Eun Jung; Kim, Jin Kyung; Cho, Lawrence; Mola, Javad; Oh, Chang Yeol; De Cooman, Bruno C.
- Date Issued
- 2017-08
- Publisher
- PERGAMON-ELSEVIER SCIENCE LTD
- Abstract
- The micro-scale plastic deformation behavior of an austenitic Fe-1.2%C-7.0%Mn (in wt%) steel was studied by means of nano-indentation and in situ compression of micro-pillars with selected crystallographic orientations. Transmission electron microscopy analysis reveals that the partial dislocation mediated twinning is preferred in a [001]-oriented single grain under compression. Twinning leads to large strain bursts during the nano-indentation and the micro-pillar compression. Perfect dislocation slip is the dominant deformation mechanism in a [111]-oriented single grain under compression. The observations offer strong support for the hypothesis that deformation twinning is a plasticity enhancing mechanism activated during the deformation of medium Mn steel. (C) 2017 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.
- Keywords
- STACKING-FAULT ENERGY; INDUCED PHASE-TRANSFORMATION; FOCUSED ION-BEAM; MECHANICAL-PROPERTIES; TWIP STEEL; METASTABLE AUSTENITE; HARDENING BEHAVIOR; LOW-TEMPERATURES; SINGLE-CRYSTALS; STAINLESS-STEEL
- URI
- https://oasis.postech.ac.kr/handle/2014.oak/92053
- DOI
- 10.1016/j.actamat.2017.06.014
- ISSN
- 1359-6454
- Article Type
- Article
- Citation
- ACTA MATERIALIA, vol. 135, page. 112 - 123, 2017-08
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- There are no files associated with this item.
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