Abstract
The influence of Y/Zn mole ratio on the phase composition and mechanical properties of the Mg-Y-Zn alloys has been investigated. The results show that with the decrease of Y/Zn ratio, the Mg24Y5, 18R-LPSO phase and W-phase are developed in sequence. Homogenized at 773 K for 12 h, the alloys were then extruded at 723 K with the extrusion ratio of 9. The tensile tests have been performed on the extruded Mg-Y-Zn alloys and the results show that the strengthening effects of different phases on the alloys exhibit the following tendency: LPSO + Mg24Y5 > LPSO > LPSO + W-phase > W-phase. The Mg97Y2Zn1 alloy exhibits optimal comprehensive mechanical properties with UTS 320 MPa and elongation 11% at room temperature. And the Mg95Y4Zn1 alloy exhibits the superior mechanical properties at elevated temperatures, with UTS and elongation of 330 MPa, 7.2% and 252 MPa, 27.1% at 473 K and 573 K, respectively.
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Liu, H., Xue, F., Bai, J., Zhou, J. (2013). Influence of Y/Zn Mole Ratio on the Phase Composition and Mechanical Properties of Mg-Y-Zn Alloys. In: Marquis, F. (eds) Proceedings of the 8th Pacific Rim International Congress on Advanced Materials and Processing. Springer, Cham. https://doi.org/10.1007/978-3-319-48764-9_161
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DOI: https://doi.org/10.1007/978-3-319-48764-9_161
Publisher Name: Springer, Cham
Print ISBN: 978-3-319-48586-7
Online ISBN: 978-3-319-48764-9
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