Effect of deformation induced transformation of E >-martensite on ductility enhancement in a Fe-12 Mn steel at cryogenic temperatures
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- Title
- Effect of deformation induced transformation of E >-martensite on ductility enhancement in a Fe-12 Mn steel at cryogenic temperatures
- Authors
- Kim, JS; Jeon, JB; Jung, JE; Um, KK; Chang, YW
- Date Issued
- 2014-01
- Publisher
- KOREAN INST METALS MATERIALS
- Abstract
- Metastable E >-martensite (E >-Ms) formed during a prior heat treatment of Fe-12Mn steel has been reported to transform into alpha-Ms during subsequent inelastic deformation. This deformation induced phase transformation (DIPT) from E >-Ms to alpha-Ms has been investigated in the present study within the framework of kinetics relation proposed based upon an internal variable theory of inelastic deformation. The E >-Ms phase was found to become more stable at lower temperatures to provide more prolonged DIPT from E >-Ms to alpha-Ms during an inelastic deformation at cryogenic temperatures, contrary to the case of austenite phase in various transformation induced plasticity steels being more stable at higher temperatures. This reversed stability-temperature relationship in Fe-12Mn steel appeared to provide a significant ductility enhancement at lower temperatures as well as significant strengthening effect.
- Keywords
- INDUCED EPSILON-MARTENSITE; MECHANICAL-PROPERTIES; RETAINED AUSTENITE; 0.4C-1.5SI-0.8MN STEEL; INDUCED PLASTICITY; TRIP STEELS; LOW-CARBON; C ALLOY; KINETICS; SHEET
- URI
- https://oasis.postech.ac.kr/handle/2014.oak/92412
- DOI
- 10.1007/S12540-014-1010-4
- ISSN
- 1598-9623
- Article Type
- Article
- Citation
- METALS AND MATERIALS INTERNATIONAL, vol. 20, no. 1, page. 41 - 47, 2014-01
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