Microstructure and Mechanical Properties of Extruded Mg-Zn-Nd-Y-Zr-Ca Alloy

Qiang Li; Qu Dong Wang; Xiao Qin Zeng; Wen Jiang Ding; Quanbo Tang; Shao Dong Huang

doi:10.4028/www.scientific.net/MSF.488-489.385

Paper Titles

Thermally Supported Mechanical Joining of Magnesium Components
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Investigations on Laser-TIG Hybrid Welding of Magnesium Alloys
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Influence of Process Conditions of Thixomolding^® on the Microstructure of Magnesium Mobile Phone Housing
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Mechanisms of Segregation Band Defect Formation in Pressure Die-Cast Magnesium Components
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Microstructure and Mechanical Properties of Extruded Mg-Zn-Nd-Y-Zr-Ca Alloy
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Theoretical Analysis of Plastic Forming Process for Semi-Solid Material
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Numerical Study on the Low Pressure Die Casting of AZ91D Wheel Hub
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Manufacturing and Application of Continuous Cast Semi-Solid Processed Magnesium Alloys
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Processing and Characterization of Magnesium Alloys
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Microstructure and Mechanical Properties of Extruded Mg-Zn-Nd-Y-Zr-Ca Alloy

Abstract:

Nd, Y and Ca containing Mg-Zn-Zr alloys are produced by electromagnetic direct-chilling casting process, and extruded at a temperature of 643K with two extrusion ratios of 38:1 and 22:1, respectively. The grain size is markedly reduced from 80µm in as-cast alloy to 2~5µm in as-extruded alloy due to dynamic recrystallization, and lamellar eutectics at grain boundaries in as-cast alloy are broken up and fine precipitates in the matrix come forth during hot extrusions. Mechanical properties of the alloys are measured by tensile test from room temperature to 523K. Nd, Y and Ca are favorable to the strength of the hot-extruded alloy, especially the elevated-temperature strength, which is above 200MPa in ultimate tensile strength at 523K.