Effect of Zr on the microstructure, mechanical properties and corrosion resistance of Mg–10Gd–3Y magnesium alloy |
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Authors: | Ming Sun Guohua Wu Wei Wang Wenjiang Ding |
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Affiliation: | aNational Engineering Research Center of Light Alloy Net Forming, Shanghai Jiaotong University, Shanghai 200240, China;bState Key Laboratory of Metal Matrix Composites, Shanghai Jiaotong University, Shanghai 200240, China |
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Abstract: | The influence of Zr on the microstructure, mechanical properties and corrosion resistance of Mg–10Gd–3Y (wt.%) magnesium alloy was investigated. The grain size of alloys decreased with Zr content from 0% to 0.93% (wt.%). The addition of Zr greatly improved the ultimate tensile strength (UTS) and the elongation (EL), while slightly improved the tensile yield strength (TYS). The UTS and the EL of the alloy containing 0.93% Zr increased by 125.8 MPa and 6.96% compared with base alloy, respectively. The corrosion resistances were found to decrease with Zr content from 0% to 0.42% and then increase from 0.42% to 0.93%. The differences in the sizes and distributions of the Zr-rich particles have significant effects on the corrosion behaviors. The alloy with 0.42% Zr addition revealed the optimum combination of mechanical properties and corrosion resistance. |
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Keywords: | Magnesium alloys Zr Microstructure Mechanical properties Corrosion resistance |
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