A cellular automaton model for austenite to ferrite transformation in carbon steel under non-equilibrium interface conditions

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	A cellular automaton model for austenite to ferrite transformation in carbon steel under non-equilibrium interface conditions
	Y. J. Lan; D. Z. Li; C. J. Huang; Y. Y. Li
	2004
发表期刊	Modelling and Simulation in Materials Science and Engineering
ISSN	0965-0393
卷号	12 期号:4 页码:719-729
摘要	The isothermal decomposition of austenite into ferrite is investigated using a two-dimensional cellular automaton (CA) algorithm. This CA model provides a simple solution for the difficult moving boundary problem that governs the ferrite grain growth. In this model, the growth of ferrite grains is controlled by both the austenite-ferrite (gamma-alpha) interface mobility and the carbon diffusion in the retained austenite. The competition between the gamma-alpha interface dynamics and the carbon diffusion in the austenite results in a non-equilibrium gamma-alpha interface condition. In order to predict the growth kinetics of ferrite grains, the carbon diffusion coupled with the gamma-alpha interface dynamics is resolved numerically. The driving force for the gamma-alpha interface mobility is calculated using a regular solute sub-lattice model. The kinetics of ferrite transformation predicted by this CA method is compared with that of a JMA model and experiments in the literature. The simulation provides an insight into the carbon diffusion in austenite and the microstructure evolution during transformation. Meanwhile, the results also show that the gamma-alpha interface under the present nonequilibrium condition is numerically stable in two dimensions and the simulated morphology of the ferrite grains is an almost equiaxed polygon.
部门归属	chinese acad sci, inst met res, lab special environm mat, shenyang 110016, peoples r china.;lan, yj (reprint author), chinese acad sci, inst met res, lab special environm mat, 72 wenhua rd, shenyang 110016, peoples r china;yjlan@imr.ac.cn
关键词	Fe-c Alloys Proeutectoid Ferrite Phase-transformation Grain-refinement Nucleation Kinetics Growth Boundaries Strip
URL	查看原文
WOS记录号	WOS:000222671000013
引用统计	被引频次：16[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://ir.imr.ac.cn/handle/321006/35394
专题	中国科学院金属研究所
推荐引用方式 GB/T 7714	Y. J. Lan,D. Z. Li,C. J. Huang,et al. A cellular automaton model for austenite to ferrite transformation in carbon steel under non-equilibrium interface conditions[J]. Modelling and Simulation in Materials Science and Engineering,2004,12(4):719-729.
APA	Y. J. Lan,D. Z. Li,C. J. Huang,&Y. Y. Li.(2004).A cellular automaton model for austenite to ferrite transformation in carbon steel under non-equilibrium interface conditions.Modelling and Simulation in Materials Science and Engineering,12(4),719-729.
MLA	Y. J. Lan,et al."A cellular automaton model for austenite to ferrite transformation in carbon steel under non-equilibrium interface conditions".Modelling and Simulation in Materials Science and Engineering 12.4(2004):719-729.