Effect of alloy composition on the dendrite arm spacing of multicomponent aluminum alloys

Easton, Mark, Davidson, Cameron and St John, David (2010) Effect of alloy composition on the dendrite arm spacing of multicomponent aluminum alloys. Metallurgical and Materials Transactions A, 41 6: 1528-1538. doi:10.1007/s11661-010-0183-9


Author Easton, Mark
Davidson, Cameron
St John, David
Title Effect of alloy composition on the dendrite arm spacing of multicomponent aluminum alloys
Journal name Metallurgical and Materials Transactions A   Check publisher's open access policy
ISSN 1073-5623
1543-1940
0360-2133
Publication date 2010-06
Sub-type Article (original research)
DOI 10.1007/s11661-010-0183-9
Volume 41
Issue 6
Start page 1528
End page 1538
Total pages 11
Editor D. E. Laughlin
Place of publication New York, NY, U.S.A.
Publisher Springer Sciences and Business Media
Collection year 2011
Language eng
Formatted abstract
Predictions of secondary dendrite arm spacing (SDAS) for multicomponent aluminum alloys using a dendrite ripening model are compared with experimental observations. For six of the seven alloys studied, the predicted SDAS was within 20 pct of the measured SDAS. It was found that the final SDAS was dependent upon both the solidification time and the solute profile of the solidifying alloys. It is interesting that while the solidification times and the solute segregation during solidification varied significantly over the range of alloys, these two factors largely canceled each other out so that the predicted SDAS did not vary much between the alloys. The experimental and modeling results show that elements causing high constitutional undercooling near the beginning of solidification, e.g., Ti, which reduces the grain size substantially, have little effect on the SDAS. Instead, it was found that elements that strongly partitioned toward the end of solidification were more effective at restricting SDAS coarsening.
© The Minerals, Metals & Materials Society and ASM International 2010
Keyword Phase-field model
Grain-refinement
Cooling rate
Diffusion-coefficients
Nucleant particles
Copper alloys
Si alloys
Solidification
Al
Growth
Q-Index Code C1
Q-Index Status Confirmed Code
Institutional Status UQ

Document type: Journal Article
Sub-type: Article (original research)
Collections: School of Mechanical & Mining Engineering Publications
Official 2011 Collection
 
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Citation counts: TR Web of Science Citation Count  Cited 26 times in Thomson Reuters Web of Science Article | Citations
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Created: Sun, 09 May 2010, 00:02:27 EST