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, Proceedings of: 12th Conference. Modeling of Casting, Welding and Advanced Solidification Processes. MCWASP XII: Modelling of Casting, Welding and Advanced Solidification Processes XII, The celebrity cruise ship Mercury, leaving from Vancouver, BC, 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 MCWASP XII: Modelling of Casting, Welding and Advanced Solidification Processes XII
Conference location The celebrity cruise ship Mercury, leaving from Vancouver, BC, Canada
Conference dates 7-14 June 2009
Proceedings title Proceedings of: 12th Conference. Modeling of Casting, Welding and Advanced Solidification Processes
Journal name Modeling of Casting, Welding, and Advanced Solidification Processes - Xii
Place of Publication Warrendale, PA, USA
Publisher John Wiley & Sons
Publication Year 2009
Sub-type Fully published paper
ISBN 9780873397421
0873397428
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
E2
Q-Index Code E2
Additional Notes Keynote Presentation during Session #7: "Micro and Macrostructure Formation", Saturday, June 13. Prepress title: "A model for predicting solidified grain size".

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