Na partitioning during thermomechanical processing of an Mg-Sn-Zn-Na alloy

Terbush, Jessica R., Stanford, Nicole, Nie, Jian-Feng and Barnett, Matthew R. 2013, Na partitioning during thermomechanical processing of an Mg-Sn-Zn-Na alloy, Metallurgical and materials transactions A, vol. 44, no. 11, pp. 5216-5225.

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Title Na partitioning during thermomechanical processing of an Mg-Sn-Zn-Na alloy
Author(s) Terbush, Jessica R.
Stanford, Nicole
Nie, Jian-Feng
Barnett, Matthew R.
Journal name Metallurgical and materials transactions A
Volume number 44
Issue number 11
Start page 5216
End page 5225
Total pages 10
Publisher Springer
Place of publication Berlin, Germany
Publication date 2013-11
ISSN 1073-5623
1543-1940
Summary Microstructural characterization was used to examine the changes that occur in an Mg-6Sn-5Zn-0.3Na alloy from casting to extrusion at either 623 K or 723 K (350 _C or 450 _C) followed by artificial aging at 473 K (200 _C). In particular, the partitioning of Na was examined at each step using STEM-EDS mapping. Na atoms were found to preferentially partition to the Mg-Zn phase when present. After extrusion, when no Mg-Zn was observed, the spherical Mg2Sn particles were found to be enriched in Na, particularly at the higher extrusion temperature. Artificial aging following extrusion resulted in a change in Na partitioning, and a coarse distribution of Mg-Zn precipitate rods. Na microadditions led to a high as-extruded hardness, but a significant tension–compression yield asymmetry was still observed at room temperature. The compressive yield strength was found to decrease significantly after 1000 hours of aging.
Language eng
Field of Research 099999 Engineering not elsewhere classified
Socio Economic Objective 970109 Expanding Knowledge in Engineering
HERDC Research category C1 Refereed article in a scholarly journal
Copyright notice ©2013, Springer
Persistent URL http://hdl.handle.net/10536/DRO/DU:30057659

Document type: Journal Article
Collection: Institute for Frontier Materials
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