The Role of Dispersions in Modeling the Kinetics of Phase Transformations

Abstract:

In classical models of microstructural evolution, the natural dispersion existing in the samples is often neglected. In this paper, we propose a general model that takes into account the dispersion. This model is applied to two cases of phase transformations in steels: the first one concerns the bainitic transformation and the second is dedicated to austenite to ferrite transformation. Through these examples, we show that not taking account the effects of dispersion in the model can lead to (i) incorrect prediction of the overall kinetics or (ii) an incorrect parameter fitting of the experimental data.

• Periodical: Solid State Phenomena (Volumes 172-174)
• Pages: 279-284
• DOI: https://doi.org/10.4028/www.scientific.net/SSP.172-174.279
• Online since: June 2011
• Authors: Mohamed Gouné, Philippe Maugis
• Keywords: Dispersion, Kinetic, Phase Transformation, Steel

References

[1] P. Maugis, M. Gouné: Acta Materialia vol. 53 (2005), p.3367.

[2] C. R. Hucthinson, H. S Zurob, Y. Bréchet : Materials Transactions A vol. 37 (2006), p.1768.

[3] C. R. Hutchinson, M. Gouné, A. Redjaïmia : Acta Materialia vol. 55 (2007), p.223.

[4] M. Hillert, K. Nilson, L. E. Törndahl. L. E : Journal of the Iron and Steel Institute (1971), p.49.

[5] A. Samoilov, Y. Titavets, N. Zolotorevsky, G. Hribernig, A. Pichler : Materials Science Forum vols 539-543 (2007), p.4584.

DOI: 10.4028/www.scientific.net/msf.539-543.4584

[6] T. Iung, M. Azuma, O. Bouaziz, M. Gouné, A. Perlade, D. Quidort : Materials Science Forum vols 426-432 (2003), p.3849.

DOI: 10.4028/www.scientific.net/msf.426-432.3849

[7] D. Bouleau, L. Chapuis, C. Oberbillig, K. Zhu : ArcelorMittal Internal Report (2009).

[8] O. Thuillier, F. Danoix, M. Gouné, D. Blavette : Scripta Materialia vol 55 (2006), p.1071.