Modeling of grain refinement: Part I. Effect of the solute titanium for aluminum

Yao, X., McDonald, S. D., Dahle, A. K., Davidson, C. J. and St John, D. H. (2008) Modeling of grain refinement: Part I. Effect of the solute titanium for aluminum. Journal of Materials Research, 23 5: 1282-1291. doi:10.1557/JMR.2008.0153


Author Yao, X.
McDonald, S. D.
Dahle, A. K.
Davidson, C. J.
St John, D. H.
Title Modeling of grain refinement: Part I. Effect of the solute titanium for aluminum
Journal name Journal of Materials Research   Check publisher's open access policy
ISSN 0884-2914
Publication date 2008-05-01
Year available 2008
Sub-type Article (original research)
DOI 10.1557/JMR.2008.0153
Open Access Status Not yet assessed
Volume 23
Issue 5
Start page 1282
End page 1291
Total pages 9
Editor G. E. Pike
Place of publication United States
Publisher Materials Research Society
Language eng
Subject C1
861203 Metal Castings
091207 Metals and Alloy Materials
Abstract Over the past few decades, the grain refinement of Al alloys has been extensively investigated theoretically and experimentally. However, the relative importance of the parameters that contributes to grain refinement still remains unclear and is likely to be dependent on specific solidification conditions. This paper aims to investigate the mechanisms by which Ti, a common grain-refining addition in commercial-purity aluminum (CP), contributes to grain refinement using a cellular automaton-finite control volume method (CAFVM). CAFVM is used to model the grain formation and microstructure morphology under different conditions, e.g., with and without refiners, for Al alloys. In this Part I, the effect of adding solute of Ti on grain formation through its effect on growth restriction, constitutional undercooling, and the formation of extra-potential particles are taken into account in the calculations. It is shown that the calculated results are in reasonable agreement with the experimental data.
Keyword Materials Science, Multidisciplinary
Materials Science
MATERIALS SCIENCE, MULTIDISCIPLINARY
Q-Index Code C1
Q-Index Status Confirmed Code
Institutional Status UQ

 
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Created: Thu, 26 Mar 2009, 21:59:46 EST by Sally Beard on behalf of Materials