Monte Carlo-method simulation of the deformation- induced ferrite transformation in the Fe-C system

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	Monte Carlo-method simulation of the deformation- induced ferrite transformation in the Fe-C system
	M. M. Tong; J. Ni; Y. T. Zhang; D. Z. Li; Y. Y. Li
	2004
发表期刊	Metallurgical and Materials Transactions a-Physical Metallurgy and Materials Science
ISSN	1073-5623
卷号	35A 期号:5 页码:1565-1577
摘要	A Monte Carlo (MC) technique has been used to model deformation-induced ferrite transformation (DIFT) in an Fe-C binary system on a mesoscale. The effects of strain rate, strain, and recrystallization of the matrix on DIFT are investigated. Increasing the strain rate slightly retards the onset of DIFT. The volume fraction of ferrite increases gradually as the strain increases before the volume fraction of ferrite reaches its saturation value. After the volume fraction of ferrite becomes saturated, it oscillates around its saturation value. The recrystallization of austenite slightly retards the onset of the DIFT. Although the recrystallization of austenite reduces the equilibrium volume fraction of ferrite significantly, it cannot completely suppress DIFT. The stress concentration has been shown to induce the nucleation of ferrite near the grain boundaries and phase boundaries. The significance of the reverse transformation has been investigated. We found that there is a temporal oscillation of the volume fraction of ferrite and the stored energy after they arrive at their saturation values. We conclude that this oscillation and the effect of the strain rate on DIFT are both brought about by the reverse transformation from induced ferrite to undeformed austenite. The diffusion behavior of carbon atoms in the systems is different for different strain rates. The simulation shows that the dynamic recovery of austenite cannot occur in the system during deformation under the present conditions. The results of the simulation show that, other than the oscillation of the equilibrium volume fraction of ferrite and the unusual diffusion behavior of carbon atoms, the simulation agrees well with the corresponding experimental results. The temporal oscillation of the volume fraction of ferrite and stored energy and the unusual diffusion behavior are two new phenomena that have not been reported by other researchers.
部门归属	chinese acad sci, inst met res, shenyang 110016, peoples r china. tsing hua univ, dept phys, mol & nano sci lab educ minist, beijing 100084, peoples r china. shenyang inst technol, shenyang 110168, peoples r china.;tong, mm (reprint author), chinese acad sci, inst met res, shenyang 110016, peoples r china;mmtong@imr.ac.cn
关键词	Grain-boundary Energies Low-carbon Steel Computer-simulation Dynamic Recrystallization Ultrafine Ferrite Growth Dispersion Nucleation Kinetics
URL	查看原文
WOS记录号	WOS:000221051200013
引用统计	被引频次：46[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/321006/35565
专题	中国科学院金属研究所
推荐引用方式 GB/T 7714	M. M. Tong,J. Ni,Y. T. Zhang,et al. Monte Carlo-method simulation of the deformation- induced ferrite transformation in the Fe-C system[J]. Metallurgical and Materials Transactions a-Physical Metallurgy and Materials Science,2004,35A(5):1565-1577.
APA	M. M. Tong,J. Ni,Y. T. Zhang,D. Z. Li,&Y. Y. Li.(2004).Monte Carlo-method simulation of the deformation- induced ferrite transformation in the Fe-C system.Metallurgical and Materials Transactions a-Physical Metallurgy and Materials Science,35A(5),1565-1577.
MLA	M. M. Tong,et al."Monte Carlo-method simulation of the deformation- induced ferrite transformation in the Fe-C system".Metallurgical and Materials Transactions a-Physical Metallurgy and Materials Science 35A.5(2004):1565-1577.