Phase-field modeling of Widmanstatten ferrite formation during isothermal transformation in low carbon steels

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	Phase-field modeling of Widmanstatten ferrite formation during isothermal transformation in low carbon steels
	W. Yan; N. M. Xiao; Y. Chen; D. Z. Li
	2014
发表期刊	Computational Materials Science
ISSN	0927-0256
卷号	81 页码:503-509
摘要	The simulation of Widmanstatten ferrite formation, developing from grain-boundary ferrite allotriomorphs during the isothermal austenite to ferrite transformation in binary Fe-C alloys, has been realized using Loginova and KKS phase-field models. It was found that the KKS model can quantitatively predict the transformation kinetics at a larger interfacial thickness comparing with the Loginova model. The plate spacing predicted by the KKS model is more comparable with the experimental result. Both models show that lengthening rates of plates increase linearly with increasing interfacial thickness. The simulation results demonstrate that the formation of Widmanstatten ferrite plates with realistic morphologies requires high anisotropy of interface energy. The increased strength of anisotropy causes a higher lengthening rate of Widmanstatten ferrite plate. A large interfacial energy leads to a high growth velocity of broad sides of Widmanstatten ferrite plate. The disappearance of some plates and the coalescence of two adjacent plates coarsen plate spacing, which is in good agreement with the experimental observation. The lengthening rate increases and the plate spacing decreases with increasing degree of undercooling. As the supersaturation is increased the plate lengthening rate is obviously improved and the spacing of ferrite group is refined. (C) 2013 Elsevier B.V. All rights reserved.
部门归属	[yan, wei ; xiao, namin ; chen, yun ; li, dianzhong] chinese acad sci, shenyang natl lab mat sci, inst met res, shenyang 110016, peoples r china. ; xiao, nm (reprint author), chinese acad sci, shenyang natl lab mat sci, inst met res, 72 wenhua rd, shenyang 110016, peoples r china. ; nmxiao@imr.ac.cn
关键词	Phase-field Modeling Widmanstatten Ferrite Morphological Instability Al-cu Alloy Fe-c Directional Solidification Binary-alloys Growth Kinetics Diffusion Simulation Plates Austenite
URL	查看原文
语种	英语
文献类型	期刊论文
条目标识符	http://ir.imr.ac.cn/handle/321006/72405
专题	中国科学院金属研究所
推荐引用方式 GB/T 7714	W. Yan,N. M. Xiao,Y. Chen,et al. Phase-field modeling of Widmanstatten ferrite formation during isothermal transformation in low carbon steels[J]. Computational Materials Science,2014,81:503-509.
APA	W. Yan,N. M. Xiao,Y. Chen,&D. Z. Li.(2014).Phase-field modeling of Widmanstatten ferrite formation during isothermal transformation in low carbon steels.Computational Materials Science,81,503-509.
MLA	W. Yan,et al."Phase-field modeling of Widmanstatten ferrite formation during isothermal transformation in low carbon steels".Computational Materials Science 81(2014):503-509.