Effect of traveling magnetic field on dendrite growth of Pb-Sn alloy during directional solidification

被引：8

作者：

Min Zhi-xian ^{[1
]}

Shen Jun ^{[1
]}

Wang Ling-shui ^{[1
]}

Liu Lin ^{[1
]}

机构：

[1] Northwestern Polytech Univ, State Key Lab Solidificat Proc, Xian 710072, Peoples R China

来源：

TRANSACTIONS OF NONFERROUS METALS SOCIETY OF CHINA | 2011年 / 21卷 / 09期

基金：

中国国家自然科学基金;

关键词：

directional solidification; microstructure; Pb-Sn alloy; traveling magnetic field; MELT CONVECTION; BRIDGMAN; ZONE;

D O I：

10.1016/S1003-6326(11)60959-X

中图分类号：

TF [冶金工业];

学科分类号：

0806 ;

摘要：

The influence of melt convection on dendrite growth during the upward-directional solidification of Pb-33%Sn binary alloys was investigated. The melt convection was modulated by traveling magnetic field. When the direction of traveling magnetic field was changed from upward to downward, the primary dendrite spacing gradually increased, and the distribution peak of the primary dendrite spacing shifted to the field of narrower spacing. These result from the different intensities of melt convection, which are controlled by the traveling magnetic field. The effects of the traveling magnetic field on melt convection are similar to those of adjustment in the gravity level, thus, the primary dendrite spacing varies. When the intensity of the traveling magnetic field was 1 mT, and the drawing speed was 50 mu m/s, the gravity acceleration reached 0.22g for the downward-traveling magnetic field and 3.07g for the upward-traveling magnetic field.

引用

页码：1976 / 1980

页数：5

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