Influence of the Electromagnetic Stirring on Globularization of Primary Solid Phase in Solid-Liquid Region

Abstract:

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Forming of alloy and composite within a solid-liquid region, i.e. thixo-forming and rheo-forming, has been recognized as a technology offering several potential advantages over casting and forging such as a low forming pressure, reduction of macrosegregation, and reduction of porosity. In this paper, a globularization for primary solid phase by a forced fluid flow in melt due to electromagnetic stirring during solidification and isothermal stirring at solid-liquid region, was examined to produce Al alloy having a globular solid phase to get a thixotropic behavior. The electromagnetic stirrer was specially designed and manufactured to create all kind of fluid flow pattern such as a circumferential, vertical, helicoidally and contra-rotating flow pattern during the solidification of a melt. The size and roundness of primary solid phase of the quenched sample after isothermal stirring at solid-liquid region were measured with respect to a stirring time and frequency. The globularization of solid phase was enhanced with incresing the stirring time and electromagnetic flux density, i.e. stirring strength.

Info:

Periodical:

Materials Science Forum (Volumes 486-487)

Edited by:

Hyung Sun Kim, Sang-Yeop Park, Bo Young Hur and Soo Wohn Lee

Pages:

550-553

DOI:

10.4028/www.scientific.net/MSF.486-487.550

Citation:

D. Y. Lee et al., "Influence of the Electromagnetic Stirring on Globularization of Primary Solid Phase in Solid-Liquid Region", Materials Science Forum, Vols. 486-487, pp. 550-553, 2005

Online since:

June 2005

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Price:

$35.00

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