Non-Fourier modeling of surface transient melting and solidification for binary alloys

IMR OpenIR

	Non-Fourier modeling of surface transient melting and solidification for binary alloys
	Tong, WH ; Yang, YS ; Zhu, SX ; Chen, XM ; Hu, ZQ ; Hui, XD
通讯作者	Yang, YS(ysyang@imr.ac.cn)
	2002-12-01
发表期刊	ACTA METALLURGICA SINICA
ISSN	0412-1961
卷号	38 期号:12 页码:1233-1237
摘要	Under laser pulse heating, a non-equilibrium heat and mass transfer model based on the non-Fourier law is developed for surface rapid melting and solidification process (RMSP) of uniphase binary alloys. Non-equilibrium kinetics and Aziz's continuous growth model are introduced in the model to describe the moving solid/liquid interface and to explain the departure from the interface equilibrium-thermodynamics. This problem involves heat and mass diffusion with a moving boundary of solid/liquid interface and is solved by an implicit Von Neumann's difference format with second-order precision. and interface tracing method. Using this model, we have analyzed laser-irradiated surface melting and solidification of dilute binary Al-Cu alloys. The calculating results show that there are very prominent effects of solid overheating and melt undercooling resulting from the high energy density of laser and interface non-equilibrium kinetics on the process. Large variations of interface velocity are also seen during the process and depend on the substrate material and heat flux. The interface temperature, velocity, solute concentration and non-equilibrium partition coefficient varying with interface location are calculated. And the fluctuation of the interface velocity and solute concentration during the solidification is also predicted.
关键词	laser heating rapid melting and solidification non-equilibrium mathematic model
收录类别	SCI
语种	英语
WOS研究方向	Metallurgy & Metallurgical Engineering
WOS类目	Metallurgy & Metallurgical Engineering
WOS记录号	WOS:000180254200001
出版者	SCIENCE CHINA PRESS
引用统计
文献类型	期刊论文
条目标识符	http://ir.imr.ac.cn/handle/321006/115566
专题	中国科学院金属研究所
通讯作者	Yang, YS
作者单位	1.Chinese Acad Sci, Inst Met Res, Dept Superalloy, Shenyang 110016, Peoples R China 2.Univ Sci & Technol Beijing, State Key Lab Adv Met & Mat, Beijing 100083, Peoples R China
推荐引用方式 GB/T 7714	Tong, WH,Yang, YS,Zhu, SX,et al. Non-Fourier modeling of surface transient melting and solidification for binary alloys[J]. ACTA METALLURGICA SINICA,2002,38(12):1233-1237.
APA	Tong, WH,Yang, YS,Zhu, SX,Chen, XM,Hu, ZQ,&Hui, XD.(2002).Non-Fourier modeling of surface transient melting and solidification for binary alloys.ACTA METALLURGICA SINICA,38(12),1233-1237.
MLA	Tong, WH,et al."Non-Fourier modeling of surface transient melting and solidification for binary alloys".ACTA METALLURGICA SINICA 38.12(2002):1233-1237.