Compositional evolution of long-period stacking ordered structures in magnesium studied by atom probe tomography

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Mg alloys containing long-period stacking ordered (LPSO) structures are strong and ductile compared to conventional Mg alloys. We study here the compositional evolution of LPSO structures in a Mg97Y2Zn1 (at.%) alloy upon annealing at 500 degrees C using atom probe tomography. In the material annealed for 2.511, the Zn/Y ratio of the building blocks in the interdendritic LPSO phase (0.73) is close to the stoichiometric composition of Y(8)Zn(6)L1(2) clusters while that in plate-type LPSO structures (0.66) slightly deviates from the ideal value. The Y/Zn enrichment in LPSO structures in the alpha-Mg matrix slightly decreases with increasing annealing time. (C) 2018 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.
Publisher
PERGAMON-ELSEVIER SCIENCE LTD
Issue Date
2018-11
Language
English
Article Type
Article
Keywords

Y-ZN ALLOYS; MECHANICAL-PROPERTIES; BUILDING-BLOCK; PHASE; 14H; 18R; TRANSFORMATIONS; MICROSTRUCTURE; STRENGTH; SYSTEM

Citation

SCRIPTA MATERIALIA, v.156, pp.55 - 59

ISSN
1359-6462
DOI
10.1016/j.scriptamat.2018.07.017
URI
http://hdl.handle.net/10203/245636
Appears in Collection
MS-Journal Papers(저널논문)
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