Effect of the electromagnetic vibration intensity on microstructural refinement of Al-7%Si alloy

被引：37

作者：

Mizutani, Y ^{[1
]}

Ohura, Y

Miwa, K

Yasue, K

Tamura, T

Sakaguchi, Y

机构：

[1] Natl Inst Adv Ind Sci & Technol, Inst Struct & Engn Mat, Light Met Solidificat Proc Grp, Nagoya, Aichi 4638560, Japan

[2] Daido Inst Technol, Dept Mech Engn, Nagoya, Aichi 4570819, Japan

来源：

MATERIALS TRANSACTIONS | 2004年 / 45卷 / 06期

关键词：

electromagnetic vibrations; refinement; solidification process; high magnetic field; aluminium-silicon alloy;

D O I：

10.2320/matertrans.45.1944

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The static magnetic field and the alternating electric field were simultaneously imposed on the melt of Al-7%Si hypo-eutectic alloy, and primary a-dendrite particles were refined by electromagnetic vibrations imposed during solidification. The refinement mechanism of primary a-dendrite particles was quantitatively investigated in terms of vibration intensity. When the vibration intensity was increased, coarse equiaxed dendrite particles decreased, and primary alpha-dendrites approached a globular shape that size was about 25 mum in diameter. By contrast, dendrite arm spacing (DAS) remained intrinsically unchanged even if vibration intensity was changed with electric current intensity. Refinement of primary alpha-dendrite particles was likely to be caused by collapse of dendrite arms due to the micro-explosion and stirring of the melt.

引用

页码：1944 / 1948

页数：5

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