Microstructure Evolution of Hypoeutectic Al-Si Alloy With Electromagnetic Stirring and Ultrasonic Treatment

被引：0

作者：

ZHANG Yu-bo ^{[1
]}

FU Ying ^{[1
]}

WANG Tong-min ^{[1
]}

CAO Zhi-qiang ^{[1
]}

LI Ting-ju ^{[1
]}

机构：

[1] School of Materials Science and Engineering,Dalian University of Technology

来源：

Journal of Iron and Steel Research(International) | 2012年 / S1期

基金：

中国国家自然科学基金;

关键词：

electromagnetic stirring; ultrasonic treatment; Al-Si alloy; microstructure;

D O I：

10.13228/j.boyuan.issn1006-706x.2012.s1.045

中图分类号：

TG146.21 [];

学科分类号：

080502 ;

摘要：

Effects of electromagnetic stirring(EMS),ultrasonic treatment(UST)and the combination of EMS and UST(EU)on solidification structure were investigated in hypoeutectic A1-Si alloy.The results indicate that EMS,UST and EU can refine primaryα-Al and modify eutectic silicon by influencing their nucleation and growth processes.EMS can fracture the dendrite arms and lead to decrease of primaryα-Al grain size.It also changes the morphology of eutectic silicon and widens the separation of silicon plates.For UST,the cavitation and acoustic streaming are the principal reasons for the microstructure refinement,which enhance the undercooled and heterogeneous nucleation.EU has combined the features of EMS and UST,hence obtains the best effect on the microstructure evolution.Significant refinement of primaryμ-Al and evident modification of eutectic silicon are observed with EU.In addition,the mechanism of morphological evolution with EU was preliminarily discussed.

引用

页码：212 / 216

页数：5

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