Cellular automaton modeling of peritectic transformation⋆

Yiming Fan; Hui Fang; Qianyu Tang; Qingyu Zhang; Shiyan Pan; Mingfang Zhu

doi:10.1140/epje/i2020-11939-x

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2024 Impact factor 2.2

Soft Matter and Biological Physics

Branching Dynamics at the Mesoscopic Scale

Eur. Phys. J. E (2020) 43: 17
https://doi.org/10.1140/epje/i2020-11939-x

Regular Article

Cellular automaton modeling of peritectic transformation^⋆

Yiming Fan¹, Hui Fang¹, Qianyu Tang¹, Qingyu Zhang¹^,2, Shiyan Pan³ and Mingfang Zhu¹^*

¹ Jiangsu Key Laboratory of Advanced Metallic Materials, School of Materials Science and Engineering, Southeast University, 211189, Nanjing, China
² Shagang School of Iron and Steel, Soochow University, 215137, Suzhou, China
³ School of Materials Science and Engineering, Nanjing University of Science and Technology, 210094, Nanjing, China

^* e-mail: zhumf@seu.edu.cn

Received: 3 July 2019
Accepted: 13 February 2020
Published online: 9 March 2020

Abstract

A two-dimensional multiphase cellular automaton (CA) model is proposed for the prediction of growth kinetics and microstructural evolution during peritectic transformation of Fe-C alloys. The proposed model is validated by comparing the simulation results with the experimental measurements and analytical predictions for the growth kinetics of the $\gamma$ -phase and the concentration distributions. The simulated time evolution of the $\gamma$ -phase thickness and the concentration distribution in the $\gamma$ -phase agree well with the experimental data, demonstrating the quantitative capabilities of the proposed model. The influences of the holding temperature and $\gamma$ -phase thickness on the $\gamma$ -phase growth behavior are analyzed based on the simulation results. The $\gamma$ -phase growth velocity is found to decrease with increasing the $\gamma$ -phase thickness and holding temperature. Simulations are also performed for the microstructural evolution during isothermal peritectic transformation of Fe-C alloys with the primary $\delta$ -phase being an equiaxed dendrite under different holding temperatures. It is found that the driving force for $\gamma$ -phase growth increases with decreasing temperature.