On grain coarsening and refining of the Mg-3Al alloy by Sm

Hu, Xiaoyu, Fu, Penghuai, St John, David, Peng, Liming, Sun, Ming and Zhang, Mingxing (2016) On grain coarsening and refining of the Mg-3Al alloy by Sm. Journal of Alloys and Compounds, 663 387-394. doi:10.1016/j.jallcom.2015.11.193

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Author Hu, Xiaoyu
Fu, Penghuai
St John, David
Peng, Liming
Sun, Ming
Zhang, Mingxing
Title On grain coarsening and refining of the Mg-3Al alloy by Sm
Journal name Journal of Alloys and Compounds   Check publisher's open access policy
ISSN 0925-8388
1873-4669
Publication date 2016-04-05
Year available 2015
Sub-type Article (original research)
DOI 10.1016/j.jallcom.2015.11.193
Open Access Status File (Author Post-print)
Volume 663
Start page 387
End page 394
Total pages 8
Place of publication Amsterdam, Netherlands
Publisher Elsevier BV
Language eng
Formatted abstract
The effect of Sm on the microstructure of a Mg–3Al alloy has been investigated where it was found that the size of the primary α-Mg grains was significantly coarsened by the addition of 0.7 wt. % Sm, but dramatically refined by 2.1 wt. % Sm. It is proposed that the coarsening effect of Sm is due to a decrease in the nucleation potency of the native Al–Fe–C–O particles when they transform to the lower potency Al–Fe–Sm–C–O particles. The grain refinement observed when 2.1 wt. % Sm is added, is caused by the formation of potent Al2Sm nucleant particles prior to the solidification of α-Mg. The “Interdependence Theory” was then applied to describe the nucleant selection process in the Mg–3Al–2.1Sm alloy.
Keyword Metals and alloys
Nucleation
Rare earth compounds
Solidification
Q-Index Code C1
Q-Index Status Provisional Code
Institutional Status UQ

Document type: Journal Article
Sub-type: Article (original research)
Collections: School of Mechanical & Mining Engineering Publications
Official 2016 Collection
 
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