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Published in: Journal of Materials Science 18/2012

01-09-2012

A study of the microstructure, phase composition, and mechanical properties of extruded Mg–9Er–6Y–xZn–0.6Zr magnesium alloys

Authors: Jingfeng Wang, Pengfei Song, Xiaoen Zhou, Fusheng Pan

Published in: Journal of Materials Science | Issue 18/2012

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Abstract

The microstructure, phase composition, and mechanical properties of Mg–9Er–6Y–xZn–0.6Zr (x = 1, 3, 5 wt%; nominal chemical composition) series alloys were investigated through optical microscopy, X-ray diffraction, scanning electron microscopy, energy-dispersive X-ray spectrometry, transmission electron microscopy, and tensile tests. Numerous granular Mg24(Er, Y, Zn)5 phases were distributed in a discontinuous network mainly along the grain boundaries in the alloy with 1 wt% Zn. With increasing Zn content, the Mg24(Er, Y, Zn)5 phases in the alloys gradually disappeared, the amount of block Mg12Zn(Y, Er) phases increased, and the block size became larger. In addition, a few lamellar phases grew parallel with one another from the grain boundaries to the grain interior in the alloys. The crystallographic structures of the Mg12Zn(Y, Er) and Mg24(Er, Y, Zn)5 phases were confirmed as 18R-type long-period stacking ordered structures and body-centered cubic structures, respectively. The Mg12Zn(Y, Er) phases with long-period stacking ordered structures increased the strength and toughness of the alloys more than the Mg24(Er, Y, Zn)5 phases with body-centered cubic structures.

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Metadata
Title
A study of the microstructure, phase composition, and mechanical properties of extruded Mg–9Er–6Y–xZn–0.6Zr magnesium alloys
Authors
Jingfeng Wang
Pengfei Song
Xiaoen Zhou
Fusheng Pan
Publication date
01-09-2012
Publisher
Springer US
Published in
Journal of Materials Science / Issue 18/2012
Print ISSN: 0022-2461
Electronic ISSN: 1573-4803
DOI
https://doi.org/10.1007/s10853-012-6614-9

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