Preparation of semi-solid slurry at power frequency by annulus electromagnetic stirring method

The effect of stirring frequency on the semi-solid A357 aluminum alloy microstructure was investigated by annulus electromagnetic stirring(AEMS) method. The microstructures obtained by AEMS method and ordinary electromagnetic stirring(EMS)method were compared and analyzed. The results show that the...

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Bibliographic Details
Published inTransactions of Nonferrous Metals Society of China Vol. 19; pp. s531 - s536
Main Authors BAI, Yue-long, XU, Jun, ZHANG, Zhi-feng, SHI, Li-kai
Format Journal Article
LanguageEnglish
Published Elsevier Ltd 01.12.2009
Subjects
A357 aluminum alloy
Aluminum base alloys
China
Cost engineering
Disperse
electromagnetic stirring
Investment
Liquids
Microstructure
semi-solid
Semi-solid processing
slurry preparation
Stirring
A357 aluminum alloy
electromagnetic stirring
semi-solid
slurry preparation
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Summary:The effect of stirring frequency on the semi-solid A357 aluminum alloy microstructure was investigated by annulus electromagnetic stirring(AEMS) method. The microstructures obtained by AEMS method and ordinary electromagnetic stirring(EMS)method were compared and analyzed. The results show that the primary α(Al) particles become more spherical and fine, and disperse uniformly in a liquid matrix with increasing stirring frequency, and higher stirring frequency is advantageous to obtain the fine spherical semi-solid microstructure by AEMS. Compared with the microstructures obtained at stirring frequency of 50 Hz in EMS, the fine spherical and uniformly distributed semi-solid microstructures can be still obtained at stirring frequency of 50 Hz in AEMS, so stirring frequency of 50 Hz is recommended in AEMS to save investment cost on frequency-conversion facilities.
Bibliography:ObjectType-Article-2
SourceType-Scholarly Journals-1
ObjectType-Feature-1
content type line 23
ISSN:1003-6326
DOI:10.1016/S1003-6326(10)60103-3