Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
1579593 | Materials Science and Engineering: A | 2010 | 6 Pages |
Abstract
Hot-deformation behavior of super-cooled austenite within the austenite–ferrite (γ–α) 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 T0 temperature. This was due to large shift of γ–α phase-equilibrium to a higher temperature during hot-deformation. A thermodynamic model to account the effect of non-uniform deformation-induced stress on the γ–α phase-equilibrium during hot-deformation was proposed and its prediction was in good agreement with the experimentally measured critical temperature.
Keywords
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Physical Sciences and Engineering
Materials Science
Materials Science (General)
Authors
J.H. Chung, J.K. Park, T.H. Kim, K.H. Kim, S.Y. Ok,