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论文类型：期刊论文

发表时间：2012-04-01

发表刊物：MATERIALS TECHNOLOGY

收录刊物：SCIE、EI、Scopus

卷号：27

期号：2

页面范围：173-175

ISSN号：1066-7857

关键字：Power ultrasonic; Electromagnetic stirring; Structural; Segregation

摘要：It is well known that in the melt treated by power ultrasonic treatment (UT) or electromagnetic stirring (EMS), the solidification structure is refined, and the solute segregation is improved. However, few studies in the literature involve the comparative study of UT and EMS. This report examines the effect of diverse physical field (UT or EMS) on solidification structure and solute distribution of Al-1%Si alloy. The experimental results show that the solidification structure of ingots can be refined using UT or EMS solely, and by the compound of UT and EMS, the structure is further refined. At the same time, the grain boundary segregation of Si element is restrained in the sole physical field; in compound physical field of UT and EMS, the restraining effect is enhanced.