Mechanism of pulse magneto-oscillation grain refinement on pure Al  

作　　者：Pei Ning Gong Yongyong Li Renxing Xia Zanqi Zhai Qijie 

机构地区：[1]College of Science, Shanghai University, Shanghai 200444, China [2]Shanghai Key Laboratory of Modern Metallurgy ＆ Materials Processing, Shanghai University, Shanghai 200072, China

出　　处：《China Foundry》2011年第1期47-50,共4页中国铸造（英文版）

基　　金：supported by the National Natural Science Foundation of China (50574056)

摘　　要：Pulse magneto-oscillation (PMO) was developed as a novel technique to refine the solidification structure of pure aluminium.Its grain refining mechanism was proposed.The PMO refinement mechanism is that the nucleus falls off from the mould wall and drifts into the melt under the action of PMO.The solidification structure of Al melt depends on the linear electric current density,and also the discharge and oscillation frequencies.The radial pressure of PMO sound wave is the major factor that contributes to the migration of nucleus into the melt.Pulse magneto-oscillation （PMO） was developed as a novel technique to refine the solidification structure of pure aluminium.Its grain refining mechanism was proposed.The PMO refinement mechanism is that the nucleus falls off from the mould wall and drifts into the melt under the action of PMO.The solidification structure of Al melt depends on the linear electric current density,and also the discharge and oscillation frequencies.The radial pressure of PMO sound wave is the major factor that contributes to the migration of nucleus into the melt.

关 键 词：pulse magneto-oscillation grain refining SOLIDIFICATION aluminium 

分 类 号：TG146.21[一般工业技术—材料科学与工程]