超声作用下模型合金的定向凝固行为

董慧迎; 陈长乐; 段萌萌

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超声作用下模型合金的定向凝固行为
Growth Behavior of SCN-5% Ethanol Model Alloy in Ultrasonic Vibration
2009年29卷第8期页码：751-754
纸质出版日期： 2009 ，
DOI：

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[1]董慧迎,陈长乐,段萌萌.超声作用下模型合金的定向凝固行为[J].特种铸造及有色合金,2009,29(08):751-754+684.

Dong Huiying, Chen Changle, Duan Mengmeng. Growth Behavior of SCN-5% Ethanol Model Alloy in Ultrasonic Vibration[J]. Special Casting & Nonferrous Alloys, 2009,29(8):751-754.
[1]董慧迎,陈长乐,段萌萌.超声作用下模型合金的定向凝固行为[J].特种铸造及有色合金,2009,29(08):751-754+684. DOI：

Dong Huiying, Chen Changle, Duan Mengmeng. Growth Behavior of SCN-5% Ethanol Model Alloy in Ultrasonic Vibration[J]. Special Casting & Nonferrous Alloys, 2009,29(8):751-754. DOI：

摘要

以模型合金丁二腈-5%乙醇为试验对象

研究了定向凝固过程中施加超声振动对固/液界面形貌动态演化过程的影响。结果表明

超声场可抑制定向凝固的速度

使界面形态钝化;超声施加与去除

致使界面凸起增多

晶粒细化;超声作用使熔体中产生气泡

气泡的增大、合并和崩溃引起形核增多

从而细化晶粒。

Abstract

Effects of ultrasonic vibration on morphology evolution of solid-liquid interface of SCN-5% ethanol model alloy were observed during directional solidification. The results show that the growth of interface morphology of the model alloy can be restrained as a result of ultrasonic field restricting solidified velocity during directional solidification. Grain size in the alloy can be refined with applying-unloading ultrasonic field resulting from the increase of interface tip. In addition

ultrasonic field can increase nucleation rate as a result of creation and growth of bubbles to merging and collapsing

resulting in the refinement of grain size in the model alloy.