【作者】 杨洁； 吴耀明； 房大庆； 王立民； 张洪杰；

【Author】 Yang Jie, Wu Yaoming, Fang Daqing, Wang Limin, Zhang Hongjie (Key Laboratory of Rare Earth Chemistry and Physics , Changchun Institute of Applied Chemistry , Chinese Academy of Sciences, Changchun 130022 , China;Graduate School, Chinese Academy of Sciences , Beijing 100049, China)

【机构】 中国科学院长春应用化学研究所中国科学院稀土化学与物理重点实验室；

【摘要】 用快速凝固方法制备了Mg-4．11％Zn-0．87％Y(质量分数)合金,研究了合金的组织和力学性能。结果表明,快速凝固合金的相组成主要为α-Mg过饱和固溶体。样品在573 K热处理后,合金中除α-Mg相外还生成了MgZn2相,α-Mg的晶胞参数增大。此后,热处理温度升高至 773 K,还有Mg24Y5相析出,α-Mg的晶胞参数减小。快速凝固合金的室温韦氏硬度为112,抗拉强度为262 MPa,延伸率为7％。热处理后样品的硬度和抗拉强度随着热处理温度的升高而下降。更多还原

【Abstract】 The microstructures and mechanical properties of the melt-spun Mg-4. 11%Zn-0. 87% Y alloy were investigated. The results show that the alloy consists of a main super saturated solid solution phase of α-Mg. When the alloy was annealed at 573 K, MgZn2 phase was formed except for α-Mg phase and the lattice parameters of α-Mg increased. When the annealing temperature was enhanced to 773 K, Mg24 Y5 phase was formed besides the phase mentioned above, but the lattice parameters of the α-Mg decreased. The Vickers microhardness (HV) , ultimate tensile strength (UTS) and elongation for the melt-spun alloy are 112, 262 MPa and 7% at room temperature, respectively, and these values decreased with increasing temperature.更多还原