Grain refinement of pure aluminum by direct current pulsed magnetic field and inoculation

被引：20
|
作者：
Chen, Hang [1 ]
Jie, Jin-chuan [1 ]
Fu, Ying [1 ]
Ma, Hong-jun [1 ]
Li, Ting-ju [1 ]
机构：
[1] Dalian Univ Technol, Sch Mat Sci & Engn, Dalian 116023, Peoples R China
来源：
TRANSACTIONS OF NONFERROUS METALS SOCIETY OF CHINA | 2014年 / 24卷 / 05期
基金：
中国国家自然科学基金; 中国博士后科学基金;
关键词：
direct current pulsed magnetic field; pure aluminum; inoculation; grain refinement; solidification micro structure; MICROSTRUCTURE REFINEMENT; ALLOYS; AL;
D O I：
10.1016/S1003-6326(14)63191-5
中图分类号：
TF [冶金工业];
学科分类号：
0806 ;
摘要：
The combined effects of direct current pulsed magnetic field (DC-PMF) and inoculation on pure aluminum were investigated, the grain refinement behavior of DC-PMF and inoculation was discussed. The experimental results indicate that the solidification micro structure of pure aluminum can be greatly refined under DC-PMF. Refinement of pure aluminum is attributed to electromagnetic undercooling and forced convection caused by DC-PMF. With single DC-PMF, the grain size in the equiaxed zone is uneven. However, under DC-PMF, by adding 0.05% (mass fraction) Al-5Ti-B, the grain size of the sample is smaller, and the size distribution is more uniform than that of single DC-PMF. Furthermore, under the combination of DC-PMF and inoculation, with the increase of output current, the grain size is further reduced. When the output current increases to 100 A, the average grain size can decrease to 113 mu m.
引用
收藏
页码：1295 / 1300
页数：6
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