An inverse growth restriction model for predicting solidified grain size

StJohn, D. H., Easton, M. A. and Qian, Ma (2009). An inverse growth restriction model for predicting solidified grain size. In: Steve L. Cockcroft and Daan M. Maijer, Modeling of Casting, Welding, and Advanced SolidificationProcesses-XII : Proceedings from the Twelfth International Conference on Modeling of Casting, Welding and Advanced Solidification Processes. 12th International Conference on Modeling of Casting, Welding and Advanced Solidification Processes, Vancouve, Canada, (477-484). 7-14 June 2009.

Author StJohn, D. H.
Easton, M. A.
Qian, Ma
Title of paper An inverse growth restriction model for predicting solidified grain size
Conference name 12th International Conference on Modeling of Casting, Welding and Advanced Solidification Processes
Conference location Vancouve, Canada
Conference dates 7-14 June 2009
Proceedings title Modeling of Casting, Welding, and Advanced SolidificationProcesses-XII : Proceedings from the Twelfth International Conference on Modeling of Casting, Welding and Advanced Solidification Processes
Place of Publication Warrendale, PA, United States
Publisher John Wiley & Sons
Publication Year 2009
Sub-type Fully published paper
ISBN 9780873397421
Editor Steve L. Cockcroft
Daan M. Maijer
Start page 477
End page 484
Total pages 8
Language eng
Formatted Abstract/Summary The recently developed inverse growth restriction model is a useful method of predicting the number of successful nucleation events during solidification and therefore grain size. It is proposed that the inverse growth restriction model can be incorporated into simulation models relatively easily. This paper extends the model to include the effect of changing castings conditions such as cooling rate, degree of superheat and ultrasonic treatment on grain size. The extended model indicates that the effect of a range of casting conditions can be incorporated into a simulation model without additional complexity. The application of the inverse growth restriction model in microstructure development simulation models is discussed. Two areas requiring further research have been identified. One area is to study the relative impact of thermal and consitutional undercooling on the final as-cast grain size. Through this understanding a model that predicts these relative effects can be developed. The other area is to determine the feasability of the proposed hypothesis that the lattice mismatch between the nucleant particle and the primary phase can be used as a measure of potency rather than the undercooling required for nucleation of the grain.
Subjects 09 Engineering
Q-Index Code EX
Q-Index Status Provisional Code
Institutional Status UQ
Additional Notes The conference was held on the celebrity cruise ship Mercury, leaving from Vancouver, BC, Canada.

 
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Created: Fri, 27 Nov 2009, 09:55:20 EST by Ms Lynette Adams on behalf of School of Engineering