Microstructures and mechanical properties of the extruded Mg-4Y-2Gd-xZn-0.4Zr alloys |
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Authors: | Ke Liu Jian Meng |
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Affiliation: | a School of Materials Science and Engineering Beijing University of Technology, Beijing 100124, PR China b State Key Laboratory of Rare Earth Resources Utilization, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun, 130022, PR China |
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Abstract: | Microstructures and mechanical properties of the Mg-4Y-2Gd-0.4Zr alloy with Zn additions have been investigated. The investigation suggests that the mechanical properties of the alloys have been greatly improved after hot extrusion due to the refinement of microstructures, especially the elongations. The extruded Mg-4Y-2Gd-1.0Zn-0.4Zr alloy displays excellent tensile properties. The ultimate tensile strength and the yield tensile strength are 291 and 228 MPa, respectively, with an elongation of 28%. The additions of Zn have an obvious effect on refining microstructure of the extruded alloys, and the vicker hardness increases with increasing Zn additions. The age hardening responses of the extruded alloys have been investigated at 220 °C. These alloys display unobvious ageing hardness responses. |
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Keywords: | Magnesium alloys Age hardening behavior Mechanical properties |
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