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Indexed by:期刊论文

Date of Publication:2014-11-01

Journal:INTERNATIONAL JOURNAL OF MATERIALS RESEARCH

Included Journals:SCIE、EI、Scopus

Volume:105

Issue:11

Page Number:1067-1074

ISSN No.:1862-5282

Key Words:Aluminum alloys; Rotating magnetic field; Ultrasonic field; Solidification microstructure; Mechanical properties

Abstract:The application of physical fields is currently a common method to improve the solidification structure of Al alloys. In this study, rotating magnetic field (RMF) and power ultrasonic field (USF) were applied during the solidification process of Al-8 wt.% Si alloy. The experimental results have been compared to those of conventional casting and have verified that the alloys processed under individual RMF or USF exhibit obvious refinement in their solidification structure as well as an enhancement in the mechanical properties. However, the refinement under RMF is not fully effective, while the ultrasonically treated region is inadequate. For the case of the compound fields, it could be furthermore observed that these improvements become more pronounced. Owing to the advantages of both RMF and USF, RMF enlarges the ultrasonic treated region, and USF improves the refinement effect of RMF as well.