Preparation, microstructure and degradation performance of biomedical magnesium alloy fine wires |
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Authors: | Jing Bai Lingling Yin Ye Lu Yiwei Gan Feng Xue Chenglin Chu Jingli Yan Kai Yan Xiaofeng Wan and Zhejun Tang |
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Institution: | School of Materials Science and Engineering, Southeast University, Jiangning, Nanjing 211189, Jiangsu, China
Jiangsu Key Laboratory for Advanced Metallic Materials, Jiangning, Nanjing 211189, Jiangsu, China;School of Materials Science and Engineering, Southeast University, Jiangning, Nanjing 211189, Jiangsu, China
Jiangsu Key Laboratory for Advanced Metallic Materials, Jiangning, Nanjing 211190, Jiangsu, China;School of Materials Science and Engineering, Southeast University, Jiangning, Nanjing 211189, Jiangsu, China
Jiangsu Key Laboratory for Advanced Metallic Materials, Jiangning, Nanjing 211191, Jiangsu, China;School of Materials Science and Engineering, Southeast University, Jiangning, Nanjing 211189, Jiangsu, China
Jiangsu Key Laboratory for Advanced Metallic Materials, Jiangning, Nanjing 211192, Jiangsu, China;School of Materials Science and Engineering, Southeast University, Jiangning, Nanjing 211189, Jiangsu, China
Jiangsu Key Laboratory for Advanced Metallic Materials, Jiangning, Nanjing 211193, Jiangsu, China;School of Materials Science and Engineering, Southeast University, Jiangning, Nanjing 211189, Jiangsu, China
Jiangsu Key Laboratory for Advanced Metallic Materials, Jiangning, Nanjing 211194, Jiangsu, China;School of Materials Science and Engineering, Southeast University, Jiangning, Nanjing 211189, Jiangsu, China
Jiangsu Key Laboratory for Advanced Metallic Materials, Jiangning, Nanjing 211195, Jiangsu, China;College of Mechanical Engineering, Yangzhou University, Yangzhou 225127, Jiangsu, China;School of Mechanical Engineering, Nantong University, Nantong 226019, Jiangsu, China;Mechanical and Electrical College, Nanjing University of Aeronautics and Astronautics, Nanjing 210016, Jiangsu, China |
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Abstract: | With the development of new biodegradable Mg alloy implant devices, the potential applications of biomedical Mg alloy fine wires are realized and explored gradually. In this study, we prepared three kinds of Mg alloy fine wires containing 4 wt% RE(Gd/Y/Nd) and 0.4 wt% Zn with the diameter less than 0.4 μm through casting, hot extruding and multi-pass cold drawing combined with intermediated annealing process. Their microstructures, mechanical and degradation properties were investigated. In comparison with the corresponding as-extruded alloy, the final fine wire has significantly refined grain with an average size of 3–4 μm, and meanwhile shows higher yield strength but lower ductility at room temperature. The degradation tests results and surface morphologies observations indicate that Mg–4Gd–0.4Zn and Mg–4Nd–0.4Zn fine wires have similar good corrosion resistance and the uniform corrosion behavior in SBF solution. By contrast, Mg–4Y–0.4Zn fine wire shows a poor corrosion resistance and the pitting corrosion behavior. |
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Keywords: | Biomedical magnesium alloy Wires Cold drawing Microstructure Degradation |
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