Mechanical properties and energy absorption of extruded Mg–2.0Zn–0.3Zr alloy with Y addition
来源期刊：Rare Metals2015年第5期
论文作者：Bin-Jiang Lv Jian Peng Yi Peng Ai-Tao Tang Fu-Sheng Pan
文章页码：314 - 323
摘 要：The effects of the rare earth element Y addition on mechanical properties and energy absorption of a low Zn content Mg–Zn–Zr system alloy and the deformation temperature of optimized alloy were investigated by room tensile test, optical microscopy（OM）, X-ray diffraction（XRD）, scanning electron microscopy（SEM）, and transmission electron microscope（TEM）. The results show that,after homogenization at 420 °C for 12 h for the as-cast alloys, Mg Zn phase forms, which decreases the strength of Mg–2.0Zn–0.3Zr alloy with Y content of 0.9 wt%. The tensile strength and elongation of the alloy with a Y addition of 5.8 wt% reach the max value（281 ± 2） MPa and（30.1 ± 0.7） %, respectively; the strength and elongation of Mg–2.0Zn–0.3Zr–0.9Y alloy at the optimized extrusion temperature of 330 °C reach（321 ± 1） MPa and（21.9 ± 0.7） %, respectively. The energy absorption increases with the increase of Y content, the max value reached 0.79 MJ m-3with Y content of 5.8 wt%, and the energy absorption of Mg–2.0Zn–0.3Zr–0.9Y alloy at the optimized extrusion temperature of 330 °C reaches0.75 MJ m-3.
Bin-Jiang Lv1，Jian Peng1,2，Yi Peng1，Ai-Tao Tang1，Fu-Sheng Pan1,2
1. College of Materials Science and Engineering, Chongqing University2. Chongqing Advanced Materials Research Center, Chongqing Academy of Science and Technology
摘 要：The effects of the rare earth element Y addition on mechanical properties and energy absorption of a low Zn content Mg–Zn–Zr system alloy and the deformation temperature of optimized alloy were investigated by room tensile test, optical microscopy（OM）, X-ray diffraction（XRD）, scanning electron microscopy（SEM）, and transmission electron microscope（TEM）. The results show that,after homogenization at 420 °C for 12 h for the as-cast alloys, Mg Zn phase forms, which decreases the strength of Mg–2.0Zn–0.3Zr alloy with Y content of 0.9 wt%. The tensile strength and elongation of the alloy with a Y addition of 5.8 wt% reach the max value（281 ± 2） MPa and（30.1 ± 0.7） %, respectively; the strength and elongation of Mg–2.0Zn–0.3Zr–0.9Y alloy at the optimized extrusion temperature of 330 °C reach（321 ± 1） MPa and（21.9 ± 0.7） %, respectively. The energy absorption increases with the increase of Y content, the max value reached 0.79 MJ m-3with Y content of 5.8 wt%, and the energy absorption of Mg–2.0Zn–0.3Zr–0.9Y alloy at the optimized extrusion temperature of 330 °C reaches0.75 MJ m-3.
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