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Open AccessFeature PaperArticle

The Effect of Zn Content on the Mechanical Properties of Mg-4Nd-xZn Alloys (x = 0, 3, 5 and 8 wt.%)

1
Institute of Materials Research, Helmholtz-Zentrum Geesthacht, Max-Planck-Strasse 1, D 21502 Geesthacht, Germany
2
Institute of Materials Science, Joining and Forming, Graz University of Technology, A8010 Graz, Austria
*
Author to whom correspondence should be addressed.
Materials 2018, 11(7), 1103; https://doi.org/10.3390/ma11071103
Received: 30 April 2018 / Revised: 19 June 2018 / Accepted: 25 June 2018 / Published: 28 June 2018
(This article belongs to the Special Issue Thermo-Mechanical Behaviour of Structural Lightweight Alloys)
The mechanical properties of as-cast Mg-4Nd-xZn (x = 0, 3, 5 or 8 wt.%) alloys were investigated both in situ and ex situ in as-cast and solution-treated conditions. The additions of 3 or 5 wt.% Zn in the base Mg-4Nd alloy did not improve yield strength in comparison to the binary Mg-4Nd alloy. Mechanical properties were shown to improve only with the relatively high concentration of 8 wt.% Zn to Mg-4Nd. The change in intermetallic morphology from a continuous intermetallic to a lamella-like intermetallic was the primary reason for the decreased mechanical properties in Mg-4Nd-3Zn and Mg-4Nd-5Zn compared with Mg-4Nd and Mg-4Nd-8Zn. The dissolution of intermetallic at grain boundaries following heat treatment further indicated the importance of grain boundary reinforcement as shown in both in situ and ex situ compression testing. Azimuthal angle-time plots indicated little grain rotation most noticeably in Mg-4Nd, which also indicated the influence of a strong intermetallic network along the grain boundaries. View Full-Text
Keywords: magnesium alloys; zinc addition; neodymium; Mg-Nd-Zn alloys; deformation behaviour; in situ synchrotron radiation diffraction magnesium alloys; zinc addition; neodymium; Mg-Nd-Zn alloys; deformation behaviour; in situ synchrotron radiation diffraction
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Gavras, S.; Buzolin, R.H.; Subroto, T.; Stark, A.; Tolnai, D. The Effect of Zn Content on the Mechanical Properties of Mg-4Nd-xZn Alloys (x = 0, 3, 5 and 8 wt.%). Materials 2018, 11, 1103.

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