Effect of Alloy Insert on Channel Segregation During Solidification of Sn-10 wt pct Bi Alloy

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	Effect of Alloy Insert on Channel Segregation During Solidification of Sn-10 wt pct Bi Alloy
	D. R. Liu; B. G. Sang; X. H. Kang; D. Z. Li
	2011
发表期刊	Metallurgical and Materials Transactions B-Process Metallurgy and Materials Processing Science
ISSN	1073-5615
卷号	42 期号:1 页码:210-223
摘要	A promising approach is proposed for controlling the channel formation during solidification, which is characterized as inserting alloy inserts into the cavity before pouring the melt. A mathematical model, which couples melting with solidification, is developed for simulating the channel formation during solidification of the Sn-10 wt pct Bi alloy in the cavity with alloy inserts. The validity of the model is tested by real-time X-ray observation and experimental measurement. With different superheats, the effects of insert parameters, such as the amount (0.0 pct and 1.2 pct), shape (rod and particle), and initial position, on the melting process of the insert itself, thermosolutal convection, and channel formation are investigated numerically. Calculated results reveal that at a higher superheat, the extent of channel segregation is reduced with the addition of alloy inserts. Because inserts dissolve quickly, only a slight difference in channel formation is noted when the shape and initial position of inserts are changed. At a lower superheat, no channel is formed by adding the alloy inserts. Results are better with the addition of alloy balls. The local positive segregations around the unmelted inserts, which occur when alloy rods are added, are avoided.
部门归属	[liu, dongrong; sang, baoguang; kang, xiuhong; li, dianzhong] chinese acad sci, inst met res, shenyang 110016, peoples r china. [liu, dongrong] harbin univ sci & technol, sch mat sci & engn, harbin 150040, peoples r china.;liu, dr (reprint author), chinese acad sci, inst met res, shenyang 110016, peoples r china;xhkang@imr.ac.cn
关键词	Nickel-base Superalloy Pb-sn Alloys Directional Solidification Melting Behavior Macrosegregation Ingots Convection Scheme Models Liquid
URL	查看原文
WOS记录号	WOS:000286942500022
引用统计	被引频次：13[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/321006/30510
专题	中国科学院金属研究所
推荐引用方式 GB/T 7714	D. R. Liu,B. G. Sang,X. H. Kang,et al. Effect of Alloy Insert on Channel Segregation During Solidification of Sn-10 wt pct Bi Alloy[J]. Metallurgical and Materials Transactions B-Process Metallurgy and Materials Processing Science,2011,42(1):210-223.
APA	D. R. Liu,B. G. Sang,X. H. Kang,&D. Z. Li.(2011).Effect of Alloy Insert on Channel Segregation During Solidification of Sn-10 wt pct Bi Alloy.Metallurgical and Materials Transactions B-Process Metallurgy and Materials Processing Science,42(1),210-223.
MLA	D. R. Liu,et al."Effect of Alloy Insert on Channel Segregation During Solidification of Sn-10 wt pct Bi Alloy".Metallurgical and Materials Transactions B-Process Metallurgy and Materials Processing Science 42.1(2011):210-223.