Microstructure, mechanical, and corrosion properties of extruded low-alloyed Mg–xZn–0.2Ca alloys
来源期刊：International Journal of Minerals Metallurgy and Materials2019年第10期
论文作者：Ying-zhong Ma Chang-lin Yang Yun-jin Liu Fu-song Yuan Shan-shan Liang Hong-xiang Li Ji-shan Zhang
文章页码：1274 - 1284
摘 要：The microstructure, mechanical, and corrosion properties of extruded low-alloyed Mg–xZn–0.2Ca（x（28） 0, 1.0, 2.0, 3.0） alloys were investigated in this study. Findings from scanning electron microscope, X-ray diffraction and transmission electron microscopy results indicate that the amount of ternary Ca2Mg6Zn3 phase, as the only secondary phase in 1.0Zn, 2.0Zn, and 3.0Zn alloys, gradually increases with the addition of Zn, while the Mg2Ca phase was observed in the Mg–0.2Ca alloy only. Zn has a strong effect on the orientation and intensity of textures, which also influence mechanical behaviors, as revealed by electron back-scatter diffraction. Among all the alloys, the Mg–2.0Zn–0.2Ca alloy obtains the maximum tensile strength（278 MPa） and yield strength（230 MPa）. Moreover, Zn addition has an evident influence on the corrosion properties of Mg–xZn–0.2Ca alloy, and Mg–1.0Zn–0.2Ca alloy exhibits the minimum corrosion rate. This paper provides a novel low-alloyed magnesium alloy as a potential biodegradable material.
Ying-zhong Ma1，Chang-lin Yang2，Yun-jin Liu1，Fu-song Yuan3，Shan-shan Liang4，Hong-xiang Li1，Ji-shan Zhang1
1. State Key Laboratory for Advanced Metals and Materials, University of Science and Technology Beijing2. State Key Laboratory of Solidification Processing, Northwestern Polytechnical University3. Center of Digital Dentistry, Peking University School and Hospital of Stomatology4. Second Clinical Division, Peking University Hospital of Stomatology
摘 要：The microstructure, mechanical, and corrosion properties of extruded low-alloyed Mg–xZn–0.2Ca（x（28） 0, 1.0, 2.0, 3.0） alloys were investigated in this study. Findings from scanning electron microscope, X-ray diffraction and transmission electron microscopy results indicate that the amount of ternary Ca2Mg6Zn3 phase, as the only secondary phase in 1.0Zn, 2.0Zn, and 3.0Zn alloys, gradually increases with the addition of Zn, while the Mg2Ca phase was observed in the Mg–0.2Ca alloy only. Zn has a strong effect on the orientation and intensity of textures, which also influence mechanical behaviors, as revealed by electron back-scatter diffraction. Among all the alloys, the Mg–2.0Zn–0.2Ca alloy obtains the maximum tensile strength（278 MPa） and yield strength（230 MPa）. Moreover, Zn addition has an evident influence on the corrosion properties of Mg–xZn–0.2Ca alloy, and Mg–1.0Zn–0.2Ca alloy exhibits the minimum corrosion rate. This paper provides a novel low-alloyed magnesium alloy as a potential biodegradable material.
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