Abstract
The effect of 0.3 wt pct Na on the microstructure of extruded alloy Mg-2Sn-1Zn is examined. We report that Na stabilizes the Mg2Sn phase, resulting in its precipitation during extrusion under conditions where a solid solution is otherwise expected. This effect appears to be thermodynamic in nature and is different from the kinetic enhancement of low- temperature aging reported by Mendis et al. [Phil. Mag. Letters, 86 (2006), 443]. The precipitates of the current study enable useful refinement of the grain size.
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The authors would like to thank Dave Gray, Nick Birbilis, Jian Feng Nie, Katrina Morgans, and Gang Sha for their assistance and helpful discussions. The authors would also like to thank the Monash Centre for Electron Microscopy (MCEM) for the use of their facilities.
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Manuscript submitted March 3, 2013.
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Stanford, N., TerBush, J.R., Setty, M. et al. Grain Refinement of an Extruded Mg Alloy via Na Microalloying. Metall Mater Trans A 44, 2466–2469 (2013). https://doi.org/10.1007/s11661-013-1712-0
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DOI: https://doi.org/10.1007/s11661-013-1712-0