Journal
INTERMETALLICS
Volume 45, Issue -, Pages 18-23Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.intermet.2013.09.005
Keywords
Rare-earth intermetallics; Crystal growth; Microstructure; Electron microscopy, scanning
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Funding
- National Natural Science Foundation of China [51171212]
- Chongqing Science & Technology Commission [2010CSTC-HDLS, CSTC2010AA4048, CSTC2012JJJQ50001]
- China National Funds for Distinguished Young Scientists [50725413]
- National Industrialization Technology and Development Program of China [2011BAE22B03-3]
- Chongqing University [CDJXS10132203, CDJXS12130009]
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The microstructures of the as-cast and as-extruded Mg-9Li-xY alloys (x = 0, 0.3; wt%) were observed to investigate the effect of Y on the Mg-9Li alloy, and the crystallographic calculations between Mg24Y5 and the matrix were examined on the basis of the edge-to-edge matching model. The results indicated that with the addition of 0.3 wt% Y, the average grain size of alpha-Mg phases in the as-cast Mg-9Li alloy and beta-Li phases in the as-extruded Mg-9Li alloy were reduced remarkably, which was caused by the formation of Mg24Y5 intermetallic compound. Furthermore, crystallographic calculations confirmed that Mg24Y5 particles were effective grain refiners for both alpha-Mg and beta-Li phases in Mg-9Li alloy. (C) 2013 Elsevier Ltd. All rights reserved.
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