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Modeling austenite–ferrite transformation in low carbon steel using the cellular automaton method

Published online by Cambridge University Press:  01 October 2004

Y.J. Lan ,
D.Z. Li  and
Y.Y. Li
Y.J. Lan*
Affiliation:
Institute of Metal Research, Chinese Academy of Sciences, Shenyang, 110016, People’s Republic of China
D.Z. Li
Affiliation:
Institute of Metal Research, Chinese Academy of Sciences, Shenyang, 110016, People’s Republic of China
Y.Y. Li
Affiliation:
Institute of Metal Research, Chinese Academy of Sciences, Shenyang, 110016, People’s Republic of China
*
a)Address all correspondence to this author. e-mail: [email protected]
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Abstract

Austenite–ferrite transformation at different isothermal temperatures in low carbon steel was investigated by a two-dimensional cellular automaton approach, which provides a simple solution for the difficult moving boundary problem that governs the ferrite grain growth. In this paper, a classical model for ferrite nucleation at austenite grain boundaries is adopted, and the kinetics of ferrite grain growth is numerically resolved by coupling carbon diffusion process in austenite and austenite–ferrite (γ–α) interface dynamics. The simulated morphology of ferrite grains shows that the γ–α interface is stable. In this cellular automaton model, the γ–α interface mobility and carbon diffusion rate at austenite grain boundaries are assumed to be higher than those in austenite grain interiors. This has influence on the morphology of ferrite grains. Finally, the modeled ferrite transformation kinetics at different isothermal temperatures is compared with the experiments in the literature and the grid size effects of simulated results are investigated by changing the cell length of cellular automaton model in a set of calculations.

Keywords

Computer simulationPhase transformationMetal
Type
Articles
Information
Journal of Materials Research , Volume 19 , Issue 10 , October 2004 , pp. 2877 - 2886
Copyright
Copyright © Materials Research Society 2004

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