Transactions of Materials and Heat Treatment

Title：Numerical simulation of the semi-solid ZL104 alloy prepared by electromagnetic stirring process

Authors： Zhang Chenyang Zhao Shengdun Wang Yongfei

Unit： Xi'an Jiaotong University

KeyWords： semi-solid aluminum alloy electromagnetic stirring numerical simulation

ClassificationCode：TS914.1+3

year,vol(issue):pagenumber：2014,39(11):117-124

Abstract：

Based on sequential coupling method in Ansoft and Fluent softwares, a 3D coupled model of the electromagnetic field and flow field was established in the process of semi-solid ZL104 alloy prepared by electromagnetic stirring(EMS) process. The cavitation in the process of EMS was simulated by VOF method, and reasonable process parameters of semi-solid ZL104 alloy prepared by EMS were obtained. The stirring current was 55 A and the stirring frequency was 25 Hz. The results show that when the stirring current increases, the average electromagnetic force increases proportionally, and its uniformity are almost invariant. However, when the stirring frequency increases, the average electromagnetic force increases gradually, which affects the even distribution. With the increase of stirring intensity, the depth of vortex on the free surface increases accordingly and the turbulent flow is generated under the strong stirring. Experimental results show that the surface vortex under different stirring intensity is consistent with the results of numerical simulation. Semi-solid ZL104 microstructure shows that there are lots of holes under the strong stirring intensity, which verifies the validity and reliability of VOF method applied to simulate the formation of cavitation during the EMS process.

Funds：

国家自然科学基金资助项目（51335009）；国家04重大科技专项（2011ZX04016-081）；陕西省自然科学基础研究计划项目（2012JQ7032）

张晨阳（1987-），男，博士研究生

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