Microstructure, mechanical, and corrosion properties of extruded low-alloyed Mg–<i>x</i>Zn–0.2Ca alloys

Ying-zhong Ma; Chang-lin Yang; Yun-jin Liu; Fu-song Yuan; Shan-shan Liang; Hong-xiang Li; Ji-shan Zhang

doi:10.1007/s12613-019-1860-3

Volume 26 Issue 10

Oct. 2019

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Article Navigation > International Journal of Minerals, Metallurgy and Materials > 2019 > 26(10): 1274-1284

Ying-zhong Ma, Chang-lin Yang, Yun-jin Liu, Fu-song Yuan, Shan-shan Liang, Hong-xiang Li, and Ji-shan Zhang, Microstructure, mechanical, and corrosion properties of extruded low-alloyed Mg–xZn–0.2Ca alloys, Int. J. Miner. Metall. Mater., 26(2019), No. 10, pp. 1274-1284. https://doi.org/10.1007/s12613-019-1860-3

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Ying-zhong Ma, Chang-lin Yang, Yun-jin Liu, Fu-song Yuan, Shan-shan Liang, Hong-xiang Li, and Ji-shan Zhang, Microstructure, mechanical, and corrosion properties of extruded low-alloyed Mg–xZn–0.2Ca alloys, Int. J. Miner. Metall. Mater., 26(2019), No. 10, pp. 1274-1284. https://doi.org/10.1007/s12613-019-1860-3

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Research Article

Microstructure, mechanical, and corrosion properties of extruded low-alloyed Mg–xZn–0.2Ca alloys

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Corresponding authors:
Hong-xiang Li E-mail: hxli@skl.ustb.edu.cn

Ji-shan Zhang E-mail: zhangjs@skl.ustb.edu.cn
Received: 30 October 2018; Revised: 27 May 2019; Accepted: 3 June 2019

Abstract

Abstract

The microstructure, mechanical, and corrosion properties of extruded low-alloyed Mg-xZn-0.2Ca (x=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.
- magnesium alloy;
- Mg–Zn–Ca alloy;
- extrusion;
- microstructure;
- mechanical properties;
- corrosion properties;
- textures

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