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|Title:||Effects of Nd/Gd ratio on the microstructures and mechanical properties of Mg-Gd-Y-Nd-Zr alloys|
|Keywords:||Mg-Gd-Y-Nd-Zr alloy;Microstructure;Inverted extrusion;Mechanical properties|
|Abstract:||Three Mg-Gd-Y-Nd-Zr alloys with different Nd/Gd ratios (0.2, 0.5 and 1) are prepared by metal mould casting method. The microstructures and mechanical properties have been investigated. The Nd/Gd ratio has a great influence on the volume fraction of the second phase of the Mg-Gd-Y-Nd-Zr alloys. Volume fraction of the second phase increases with the Nd/Gd ratio increasing. The mechanical properties of the alloys do not get decreased when the Nd/Gd ratio rises up. It should be ascribed to the equal cumulative effect of solid solution strengthening and second phase strengthening. The as-extruded Mg-6Gd-3Y-6Nd-0.6Zr has the best mechanical properties and lowest Gd addtion, and its ultimate tensile strength, yield strength and elongation are 336 MPa, 300 MPa and 2.5%, respectively.|
|ISSN:||0975-1017 (Online); 0971-4588 (Print)|
|Appears in Collections:||IJEMS Vol.22(1) [February 2015]|
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