Journal
SCRIPTA MATERIALIA
Volume 67, Issue 12, Pages 967-970Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.scriptamat.2012.08.031
Keywords
Mg-Zn alloy; ZK60; Precipitation; Transmission electron microscopy; Atom probe tomography
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Funding
- MEXT
- Grants-in-Aid for Scientific Research [24760605] Funding Source: KAKEN
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The minor alloying element Zr in a Mg-6.2Zn-0.6Zr (ZK60) alloy causes the formation of fine Mg(Zn,Zr) precipitates at 350 degrees C which play a critical role in dynamic recrystallization during extrusion and hot rolling. When the alloy is artificially aged at 160 degrees C, the beta'(1)-precipitate grows in the [0001] direction from the Mg(Zn,Zr) particles. The structure of the Mg(Zn,Zr) is exactly the same as that of beta'(1), indicating that Zr partitioning occurs only at elevated temperature due to the sluggish diffusion of Zr. (C) 2012 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.
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