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以Mg58.5Cu30.5Y11合金为基础分别加入含量为10%(摩尔分数)的Ti、Be和Ti70Be30,通过传统铜模铸造法制备直径为3 mm的试样。分别采用X射线衍射仪、差示扫描量热计和扫描电子显微镜研究合金的相组成、热稳定性和显微组织。讨论合金元素Ti和Be对Mg58.5Cu30.5Y11块体金属玻璃的显微组织和力学性能的影响。结果表明,(Mg0.585Cu0.305Y0.11)90Ti10和(Mg0.585Cu0.305Y0.11)90(Ti0.7Be0.3)10合金中分布着CuTi相,而(Mg0.585Cu0.305Y0.11)90-Be10合金基体中镶嵌着含有CuY晶体的CuYBe非晶相。在单轴压缩载荷下,(Mg0.585Cu0.305Y0.11)90Ti10、(Mg0.585Cu0.305Y0.11)90Be10和(Mg0.585Cu0.305Y0.11)90(Ti0.7Be0.3)10合金的最大压缩断裂强度分别为797.6、952.6和1007.8 MPa,比Mg58.5Cu30.5Y11合金的强度分别提高了17%、40%和48%。根据每种合金10个试样的强度分布范围推断这3种合金的强度可靠性得到了很大提高。
Based on the Mg58.5Cu30.5Y11 alloy, Ti, Be and Ti70Be30 were respectively added by 10% (mole fraction), and the specimens with the diameter of 3 mm were prepared by the traditional copper mold casting method. The phase composition, thermal stability and microstructure of the alloy were investigated by X-ray diffraction, differential scanning calorimetry and scanning electron microscopy. The effects of alloying elements Ti and Be on the microstructure and mechanical properties of Mg58.5Cu30.5Y11 bulk metallic glass were discussed. The results show that the CuTi phase is distributed in (Mg0.585Cu0.305Y0.11) 90Ti10 and (Mg0.585Cu0.305Y0.11) 90 (Ti0.7Be0.3) 10 alloys, while the (Mg0.585Cu0.305Y0.11) 90 The Be10 alloy matrix is embedded with a CuYBe amorphous phase containing CuY crystals. Under uniaxial compressive loading, the maximum (90.5%) of (Mg0.585Cu0.305Y0.11) 90Ti10, (Mg0.585Cu0.305Y0.11) 90Be10 and (Mg0.585Cu0.305Y0.11) 90 (Ti0.7Be0.3) 10 alloys The compressive rupture strength was 797.6, 952.6 and 1007.8 MPa, respectively, which were 17%, 40% and 48% higher than those of Mg58.5Cu30.5Y11 alloy respectively. According to the strength distribution of 10 samples for each alloy, the reliability of the strength of these three alloys has been greatly improved.