Modeling of semisolid structure formation in controlled nucleation method

Yao, X., and Wang, H. (2006) Modeling of semisolid structure formation in controlled nucleation method. International Journal of Modern Physics B, 20 (25-27). pp. 4123-4128.

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Abstract

Modeling the semisolid structure formation is of significance in both understanding the mechanisms of the formation of such structure and optimization of the solidification conditions for the required structure. A modified cellular automaton (mCA) model has been developed, which is coupled with macroscopic models for heat transfer calculation and microscopic models for nucleation and grain growth. The mCA model is applied to Al-Si alloys, one of the most widely used semisolid alloys. It predicts microstructure morphology and grain size during semi-solid solidification, and determines the effects of poring temperature and mould temperature on the final microstructure. The simulated results are compared with those obtained experimentally. The resulting simulations give some insight into the mechanisms about the semisolid structure formation in Controlled Nucleation process.

Item ID: 4241
Item Type: Article (Refereed Research - C1)
Keywords: modelling; solidification; semisolid; growth; Al-Si alloy; microstructure modeling; semisolid processing; structure formation
ISSN: 1793-6578
Date Deposited: 28 Sep 2009 22:36
FoR Codes: 01 MATHEMATICAL SCIENCES > 0103 Numerical and Computational Mathematics > 010301 Numerical Analysis @ 40%
09 ENGINEERING > 0912 Materials Engineering > 091207 Metals and Alloy Materials @ 60%
SEO Codes: 86 MANUFACTURING > 8612 Fabricated Metal Products > 861203 Metal Castings @ 50%
86 MANUFACTURING > 8611 Basic Metal Products (incl. Smelting, Rolling, Drawing and Extruding) > 861199 Basic Metal Products (incl. Smelting, Rolling, Drawing and Extruding) not elsewhere classified @ 30%
89 INFORMATION AND COMMUNICATION SERVICES > 8902 Computer Software and Services > 890202 Application Tools and System Utilities @ 20%
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