Mathematical Model Research on Ultrasonic Breaking up Dendrite in Preparing Semi-solid A356

摘要：

In this paper, we introduce an mathematical theory model of ultrasonic breaking up dendrite through the experiment of put ultrasonic vibration on melting A356, which is based on the condition of the effect factors of particles compelled movement on crystal integrality. It can be seen that two factors are very importment to crushing the grain through ultrasonic vibration, namely, structure conditions of the grain growth and the dynamic conditions provided by the ultrasonic. The driving force provide by the ultrasonic can be direct alternating mechanical force and the second, third and so on sound wave force caused by ultrasound wave reflection, scattering etc.. Form the model we can found that the larger the ultrasonic power and amplitude, conditions can be more easily satisfied; simlarly the higher the ultrasonic frequency, angle crossing number, grain structure defects, the longer action time to make greater fatigue, all this factors can also make the conditions more easily satisfied.

关键词： Ultrasonic Breaking Up Dendrite Mathematical Model

作者: LI Chun LI Wen-jie WANG Jia-xuan XIONG Hong-miao

作者单位: National Defence Key Discipline Laboratory of Light Alloy Processing Science and Technology,Nanchang Hangkong University,Nanchang 330063,P.R.China

会议类型: 国际会议

会议名称: 2010 International Conference on Material and Manufacturing Technology(2010材料与制造技术国际会议 ICMMT2010)

会议地点: 重庆

会议语种:英文

页码: 70-73

在线出版日期: 2010-09-17（万方平台首次上网日期，不代表论文的发表时间）