【摘 要】
：
To improve the comprehensive mechanical properties of Mg-10Zn-5Al-0.1Sb magnesium alloy,different amount of Ce-rich rare earth (RE) was added to the alloy,and t
【机 构】
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College of Materials Science and Engineering
论文部分内容阅读
To improve the comprehensive mechanical properties of Mg-10Zn-5Al-0.1Sb magnesium alloy,different amount of Ce-rich rare earth (RE) was added to the alloy,and the effect of RE addition on the microstructure and mechanical properties of Mg-10Zn-5Al-0.1Sb alloy was investigated by means of Brinell hardness measurement,scanning electron microscopy (SEM),energy dispersive spectroscope (EDS) and X-ray diffraction (XRD).The results show that an appropriate amount of Ce-rich rare earth addition can make the Al4Ce phase particles and CeSb phase disperse more evenly in the alloy.These phases refine the alloys matrix and make the secondary phases [τ-Mg32(Al,Zn)49 phase and φ-Al2Mg5Zn2 phase] finer and more dispersive,therefore significantly improve the mechanical properties of the Mg-10Zn-5Al-0.1Sb alloy.When the RE addition is 1.0 wt.％,the tensile strengths of the alloy both at room temperature and 150 ℃ reach the maximum values while the impact toughness is slightly lower than that of the matrix alloy.The hardness increases with the increase of RE addition.
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