Simulation of Isothermal Austenitization in Banded Pearlite Steels by Cellular Automaton

Abstract:

The austenitization of steels can occur in a wide variety of initial microstructures. In this study we addressed the transformation of banded pearlite steels. Banded pearlite initial structures similar to the real ones were created. In these structures the entire transformation process was simulated whose part processes are nucleation and grain growth. The nucleation is described by a free energy based model, and the Fick II. diffusion equation by using Finite Difference Method describes the grain growth. These models have been coupled in cellular automata simulations.

• Periodical: Materials Science Forum (Volume 812)
• Pages: 465-470
• DOI: https://doi.org/10.4028/www.scientific.net/MSF.812.465
• Online since: February 2015
• Authors: Gábor Karacs, András Roósz
• Keywords: Austenitization, Banded Pearlite, Cellular Automaton, Finite Difference Method, Grain Growth, Nucleation, Simulation

References

[1] R. A. Grange, Effect of microstructural banding in steel, Metall. Trans. 2 (1971) 417–426.

DOI: 10.1007/bf02663328

[2] R. Grossterlinden, R. Kawalla, U. Lotter, H. Pircher, Formation of pearlitic banded structures in ferritic-pearlitic steels, Steel Res. 63 (1992) 331–336.

DOI: 10.1002/srin.199200529

[3] V. Faccenda, M. Falco, C. Modena, Metall. Ital. 65 (1973) 133–140.

[4] J. Geiger, A. Roósz, P. Barkóczy, Simulation of grain coarsening in two dimensions by cellular-automaton, Acta Mater. 49 (2001) 623-629.

DOI: 10.1016/s1359-6454(00)00352-9

[5] Nobuyuki Otsu, A threshold selection method from gray-level histograms, IEEE Trans. Sys., Man., Cyber. 9 1 (1979) 62–66.

DOI: 10.1109/tsmc.1979.4310076

[6] Information on http: /www. bladesmithsforum. com.

[7] A. Roósz, J. Farkas, Gy. Kaptay, Thermodynamics-based semi-empirical description of the liquidus surface and partition coefficients in ternary Al-Mg-Si alloy, Materials Science Forum 414-415 (2003) 323-328.

DOI: 10.4028/www.scientific.net/msf.414-415.323

[8] A. Jacot, M. Rappaz, A combined model for the description of austenitization, homogenization and grain growth in hypoeutectoid Fe–C steels during heating, Acta Mater. 47 (1999) 1645-1651.

DOI: 10.1016/s1359-6454(99)00005-1

[9] B. J. Yang, L. Chuzhoy, M. L. Johnson, Modeling of reaustenitization of hypoeutectoid steels with cellular automaton method, Computational Materials Science 41 (2007) 186-194.

DOI: 10.1016/j.commatsci.2007.04.001

[10] Shtansky, D. V., Nakai, K., Ohmori, Y., Pearlite to austenite transformation in an Fe–2. 6Cr–1C alloy, Acta Mater. 47 (1999) 2619–2632.

DOI: 10.1016/s1359-6454(99)00142-1

[11] Yang, B. J., Hattiagandi, A., Li, W. Z., Zhou, G. F., McGreevy, T. E., Simulation of steel microstructure evolution during induction heating, Mater. Sci. Eng. A 527 (2010) 2978–2984.

DOI: 10.1016/j.msea.2010.01.038