Grain refinement of an extruded Mg alloy via na microalloying
Date
2013
Authors
Stanford, N.
Terbush, J.R.
Setty, M.
Barnett, M.R.
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Metallurgical and Materials Transactions A, 2013; 44A(6):2466-2469
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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 Mg 2 Sn 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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Copyright 2013 The Minerals, Metals & Materials Society and ASM International