Structure and mechanical properties of extruded Mg–Gd based alloy sheet |
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| Authors: | Xiuli Hou Qiuming Peng Zhanyi Cao Shiwei Xu Shigeharu Kamado Lidong Wang Yaoming Wu Limin Wang |
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| Affiliation: | aState Key Laboratory of Rare Earth Resource Utilization, Changchun Institute of Applied Chemistry Chinese Academy of Sciences, Changchun 130022, China;bKey Laboratory of Automobile Materials, Ministry of Education, Jilin University, Changchun 130025, China;cDepartment of Mechanical Engineering, Nagaoka University of Technology, Nagaoka 940-2188, Japan |
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| Abstract: | The Mg–8Gd–2Y–1Nd–0.3Zn–0.6Zr (wt.%) alloy sheet was prepared by hot extrusion technique, and the structure and mechanical properties of the extruded alloy were investigated. The results show that the alloy in different states is mainly composed of α-Mg solid solution and secondary phases of Mg5RE and Mg24RE5 (RE = Gd, Y and Nd). At aging temperatures from 200 °C to 300 °C the alloy exhibits obvious age-hardening response. Great improvement of mechanical properties is observed in the peak-aged state alloy (aged at 200 °C for 60 h), the ultimate tensile strength (σb), tensile yield strength (σ0.2) and elongation ( ) are 376 MPa, 270 MPa and 14.2% at room temperature (RT), and 206 MPa, 153 MPa and 25.4% at 300 °C, respectively, the alloy exhibits high thermal stability. |
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| Keywords: | Mg– Gd based alloy Extrusion Precipitation Structure Mechanical properties |
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