Simulation on solidification of an Al-Ni alloy under electromagnetic stirring  

作　　者：Sha Minghong Wang Tongmin Bai Fudong Li Jun Li Tingju 

机构地区：[1]School of Materials and Metallurgy,University of Science and Technology Liaoning,Anshan 114051,China [2]School of Materials Science and Engineering,Dalian Uaiversity of Technology,Dalian 116085,China [3]Sinopec Fushun Research Institute of Petroleum and Petrochemicals,Fushun 113001,China [4]Simulation and Modeling of Metallurgical Processes,Department of Metallurgy,University of Leoben,A-8700 Leoben,Austria

出　　处：《China Foundry》2012年第3期258-262,共5页中国铸造（英文版）

基　　金：supported by the National Natural Science Foundation of China (No.50971032, No.50874022 and No.50601003);the New Century Excellent Talents in University (NCET-07-0137);the Scientific Research Fund of Liaoning Provincial Education Department,and the Specialized Research Fund for the Doctoral Program of Higher Education (No.20112120120003)

摘　　要：The microstructure of AI-Ni alloy has a significant influence on its performance, while electromagnetic stirring is one of the most effective methods for control of solidification structure of AI alloy. To investigate the effect of electromagnetic stirring on the solidification of the ingot, the solidification of the Al-50Ni alloy in vacuum with electromagnetic stirring was described by numerical simulation in this paper; and a three dimensional mathematical model was established. The electromagnetic field was simulated by ANSYS software and the thermal-flow field was simulated by FLUENT software. The coupling between the electromagnetic field and the thermal-flow field was implemented by user-defined subroutines. It is found that the current intensity has significant influences on the fluid flow and the microstructure of the alloy. The simulation results agree well with the experimental results, and the optimum current intensity under the exprimental conditions is 80 A, while the frequency is 50 Hz.The microstructure of Al-Ni alloy has a significant influence on its performance, while electromagnetic stirring is one of the most effective methods for control of solidification structure of Al alloy. To investigate the effect of electromagnetic stirring on the solidification of the ingot, the solidification of the Al-50Ni alloy in vacuum with electromagnetic stirring was described by numerical simulation in this paper; and a three dimensional mathematical model was established. The electromagnetic field was simulated by ANSYS software and the thermal-flow field was simulated by FLUENT software. The coupling between the electromagnetic field and the thermal-flow field was implemented by user-defined subroutines. It is found that the current intensity has significant influences on the fluid flow and the microstructure of the alloy. The simulation results agree well with the experimental results, and the optimum current intensity under the exprimental conditions is 80 A, while the frequency is 50 Hz.

关 键 词：electromagnetic stirring numerical simulation Al-Ni alloy SOLIDIFICATION 

分 类 号：TG146.11[一般工业技术—材料科学与工程] TF777[金属学及工艺—金属材料]