Microstructure and Mechanical Properties of Extruded Mg-Zn-Gd-Based Alloy Reinforced by Quasicrystals and Laves Phase
The microstructure and mechanical properties of Mg95.9Zn3.5Gd0.6 and Mg94.4Zn3.5Gd0.6Cu1.5 alloys reinforced by icosahedral quasicrystalline phase (I-phase) and Laves phase has been studied after extrusion at 573K. Extrusion can significantly refined the I-phase and Laves phase, and the strengthening effect of I-phase and Laves phase has been analyzed. Large volume of icosahedral phase in Mg95.9Zn3.5Gd0.6 has important role in its high UTS and elongation due to strong bonding effect at the I-phase/matrix interface for low interface energy. The Laves phase with cubic topological and close-packed structure in Mg94.4Zn3.5Gd0.6Cu1.5 alloy result in the higher heat resistance at elevated temperatures.
Yafang Han et al.
Y. Liu et al., "Microstructure and Mechanical Properties of Extruded Mg-Zn-Gd-Based Alloy Reinforced by Quasicrystals and Laves Phase", Materials Science Forum, Vols. 546-549, pp. 323-326, 2007