Formation of the microstructure in a rapid directionally solidified immiscible alloy

IMR OpenIR

	Formation of the microstructure in a rapid directionally solidified immiscible alloy
	Zhao, JZ ; Ratke, L
通讯作者	Zhao, JZ(jzzhao@imr.ac.cn)
	2006
发表期刊	SOLIDIFICATION AND GRAVITY IV
ISSN	0255-5476
卷号	508 页码:31-36
摘要	A model has been developed by taking into account the common action of the nucleation, the diffusional growth, the collisions and coagulations of the minority phase droplets and the spatial phase segregation to describe the microstructure evolution in an immiscible alloy solidified rapidly under the vertical directional solidification conditions. The model is satisfactorily verified by comparison with an analytically solvable case first, and then applied to predict the microstructure evolution in a directionally solidified Al-Pb alloy. The numerical results show that at a high solidification velocity a constitutional supercooling region appears in front of the solid/liquid interface and the liquid-liquid decomposition takes place there. A higher solidification velocity leads to a higher nucleation rate for a given temperature gradient and, therefore, a higher number density of the minority phase droplets. As a result, the average radius of droplets in the melt at the solid/liquid interface decreases with the solidification velocity.
关键词	solidification immiscible alloy microstructure modeling
收录类别	SCI
语种	英语
WOS研究方向	Materials Science ; Metallurgy & Metallurgical Engineering
WOS类目	Materials Science, Multidisciplinary ; Metallurgy & Metallurgical Engineering
WOS记录号	WOS:000236480800004
出版者	TRANS TECH PUBLICATIONS LTD
引用统计
文献类型	期刊论文
条目标识符	http://ir.imr.ac.cn/handle/321006/87265
专题	中国科学院金属研究所
通讯作者	Zhao, JZ
作者单位	1.Chinese Acad Sci, Met Res Inst, Shenyang 110016, Peoples R China 2.DLR, Inst Space Simulat, D-51140 Cologne, Germany
推荐引用方式 GB/T 7714	Zhao, JZ,Ratke, L. Formation of the microstructure in a rapid directionally solidified immiscible alloy[J]. SOLIDIFICATION AND GRAVITY IV,2006,508:31-36.
APA	Zhao, JZ,&Ratke, L.(2006).Formation of the microstructure in a rapid directionally solidified immiscible alloy.SOLIDIFICATION AND GRAVITY IV,508,31-36.
MLA	Zhao, JZ,et al."Formation of the microstructure in a rapid directionally solidified immiscible alloy".SOLIDIFICATION AND GRAVITY IV 508(2006):31-36.