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Simulation of Bridgman Directional Solidification Microstructure Using Phase Field Method

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Abstract:

In this paper, the directional solidification microstructure of Bridgman system was simulated using phase-field method, and different calculated results were obtained with four pulling velocities. When the pulling velocity is 0.06 cm/s, the columnar crystals competitively grow in the initial stage, and have a necking phenomenon in the last stage. When the pulling velocity is 0.04 cm/s, the columnar crystals become thinner and competitively grow all the time, and the microsegregation is bigger. When the pulling velocity is 1.00 cm/s, planar interface comes back, and solute trapping takes place. The columnar crystals become much thinner, and microsegregation decreases. When the pulling velocity is 3.00 cm/s, the grain boundary of columnar crystals becomes unconspicuous, and the degree of microsegregation approaches 1.

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Periodical:

Advanced Materials Research (Volumes 652-654)

Pages:

2437-2440

DOI:

https://doi.org/10.4028/www.scientific.net/AMR.652-654.2437

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Cite this paper

Online since:

January 2013

Authors:

Chunhua Tang, Jin Jun Tang, Cui Liang

Keywords:

Directional Solidification, Microsegregation, Microstructure, Supersaturation

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© 2013 Trans Tech Publications Ltd. All Rights Reserved

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