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Title: Effects of Nd/Gd ratio on the microstructures and mechanical properties of Mg-Gd-Y-Nd-Zr alloys
Authors: Liu, Xuan
Le, Qichi
Zhang, Zhiqiang
Bao, Lei
Cui, Jianzhong
Keywords: Mg-Gd-Y-Nd-Zr alloy;Microstructure;Inverted extrusion;Mechanical properties
Issue Date: Feb-2015
Publisher: NISCAIR-CSIR, India
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.
Page(s): 14-22
ISSN: 0975-1017 (Online); 0971-4588 (Print)
Appears in Collections:IJEMS Vol.22(1) [February 2015]

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