Study of deformation-induced phase transformation in plain low carbon steel at low strain rate

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Hot-deformation behavior of super-cooled austenite within the austenite-ferrite (gamma-alpha) phase field was studied in low carbon steels (0.15 wt.%) at various strain rates. Flow softening was observed during the hot-deformation at temperatures lower than critical temperature. The critical temperature was observed to be significantly higher than To temperature. This was due to large shift of gamma-alpha phase-equilibrium to a higher temperature during hot-deformation. A thermodynamic model to account the effect of non-uniform deformation-induced stress on the gamma-alpha phase-equilibrium during hot-deformation was proposed and its prediction was in good agreement with the experimentally measured critical temperature. (C) 2010 Elsevier B.V. All rights reserved.
Publisher
ELSEVIER SCIENCE SA
Issue Date
2010-07
Language
English
Article Type
Article
Keywords

GAMMA+ALPHA 2-PHASE FIELD; HOT DEFORMATION; FERRITE; AUSTENITE; BEHAVIOR

Citation

MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING, v.527, no.20, pp.5072 - 5077

ISSN
0921-5093
DOI
10.1016/j.msea.2010.04.095
URI
http://hdl.handle.net/10203/99282
Appears in Collection
MS-Journal Papers(저널논문)
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