Microstructure evolution of Al-20%Si alloy with ultrasonic standing wave treatment

被引：0

作者：

Wang, Hong-Ling ^{[1
]}

Le, Qi-Chi ^{[1
]}

Zhang, Zhi-Qiang ^{[1
]}

Cui, Jian-Zhong ^{[1
]}

Zhang, Xiang-Wen ^{[1
]}

机构：

[1] Key Laboratory of Electromagnetic Processing of Materials, Ministry of Education, Northeastern University, Shenyang,110819, China

来源：

Zhongguo Youse Jinshu Xuebao/Chinese Journal of Nonferrous Metals | 2014年 / 24卷 / 11期

关键词：

Aluminum alloys - Eutectics - Microstructure - Hypereutectic alloys - Precipitation (chemical) - Ultrasonic waves;

D O I：

暂无

中图分类号：

学科分类号：

摘要：

A hypereutectic Al-20%Si alloy was treated by ultrasonic standing wave and the microstructure evolution of Al-20%Si alloy was studied under different ultrasonic powers. The course of crystallization and mechanism of microstructural refinement for the ultrasonic treated alloy were also discussed. The results show that the precipitation of primary silicon is inhibited while the segregation and growth of primary silicon are promoted because of acoustic radiation force under the ultrasonic standing waves treatment. The morphology of eutectic Si is obviously changed after ultrasonic standing wave treatment, varying from flake to fiber shape. Eutectic Si is changed into fine fiber shape with many branches. With the increase of ultrasonic power, the morphological change of eutectic Si from flake to fiber shape is more obvious. Ultrasonic standing wave can be used in the modification of hypoeutectic Al-Si alloy. ©, 2014, Zhongguo Youse Jinshu Xuebao/Chinese Journal of Nonferrous Metals. All right reserved.

引用

页码：2749 / 2754