| Issue |
J. Phys. IV France
Volume 120, December 2004
|
|
|---|---|---|
| Page(s) | 79 - 84 | |
| DOI | https://doi.org/10.1051/jp4:2004120008 | |
J. Phys. IV France 120 (2004) 79-84
DOI: 10.1051/jp4:2004120008
Motion of diffusional transformation fronts in multi-component systems
E. Gamsjäger1, 2, F.D. Fischer3, 4 and J. Svoboda51 Institut für Mechanik, Montanuniversität Leoben, Franz-Josef-Straße 18 ,8700 Leoben, Austria
2 Christian Doppler Laboratory Functionally Oriented Material Design
3 Institut für Mechanik, Montanuniversität Leoben, Franz-Josef-Straße 18 ,8700 Leoben, Austria
4 Erich Schmid Institute for Materials Science, Austrian Academy of Sciences, Jahnstraße 12, 8700 Leoben, Austria
5 Institute of Physics of Materials, Academy of Sciences of the Czech Republic, Zizkova 22, 616 62 Brno, Czech Republic
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Abstract
The material properties of a steel slab produced during continuous casting are significantly influenced by the kinetics of the austenite(
)-to-ferrite(
) phase transformation. Former theoretical models either have used a semi-empirical approach (such as the Johnson-Mehl-Avrami equation) or simplified the situation by assuming an infinite mobility of the phase interface and/or zero mobility of substitutionally dissolved components.
In general the transformation kinetics in a multi-component system depends on the interface mobility and on the diffusion of the components. A finite mobility model for the phase transformation has been developed that takes into account the diffusion of substitutionally dissolved components. As an example the kinetics of the /-phase transformation is simulated in the Fe-Cr-Ni system.
© EDP Sciences 2004