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Precipitation Behavior of Mg-Y-Nd-Zr Alloy

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Abstract:

The precipitation behavior of Mg-Y-Nd-Zr alloy was investigated by using transmission electron microscopy. The precipitation sequence of Mg-Y-Nd-Zr alloy was confirmed as follows ; Supersaturated solid solution → β''→ β'→ β.The β'' phase was identified Mg3Nd having DO19 structure with the lattice constant of a=2aMg=0.64nm and c=cMg=0.52nm. The β' precipitate was identified as Mg12NdY having base centered orthorhombic structure with the lattice constants a, b and c of 0.64, 2.23 and 0.52 nm, respectively. The β phase was confirmed as equilibrium phase having the fcc structure with the lattice constant of a=2.22 nm.

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Periodical:

Materials Science Forum (Volumes 449-452)

Pages:

649-652

DOI:

https://doi.org/10.4028/www.scientific.net/MSF.449-452.649

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Online since:

March 2004

Authors:

In Bae Kim, Jin Young Hong, Bong Gil Hong, Kyung Hyun Kim

Keywords:

Mg-Y-Nd-Zr Alloy, Orientation Relationship, Precipitation Sequence, ϐ' Phase, ϐ'' Phase

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© 2004 Trans Tech Publications Ltd. All Rights Reserved

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