Effect of different processings on mechanical property and corrosion behavior in simulated body fluid of Mg-Zn-Y-Nd alloy for cardiovascular stent application |
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| Authors: | Shi-Jie Zhu Qian Liu Ya-Feng Qian Bin Sun Li-Guo Wang Jing-Min Wu Shao-Kang Guan |
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| Affiliation: | 1. School of Materials Science and Engineering, Zhengzhou University, 100 Kexue Road, Zhengzhou 450001, China2. National Centre for Quality Supervision and Inspection of Magnesium and Magnesium Alloy Product, No. 1 Xing He Street, Hebi 458000, China |
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| Abstract: | The biomagnesium alloys have been considered to be one of the most potential biodegradable metal materials due to its good mechanical compatibility, biological compatibility, biological security and biodegradable characteristics. However, the two major problems of high degradation rates in physiological environment and low mechanical properties prevent the development of biomagnesium alloys. In the present work, the samples of Mg-Zn-Y-Nd alloy were prepared by cyclic extrusion compression (CEC) and equal channel angular pressing (ECAP). The microstructures, mechanical properties of alloy and its corrosion behavior in simulated body fluid (SBF) were evaluated. The results reveal that Mg-Zn-Y-Nd alloy consists of equiaxial fine grain structure with the homogeneous distribution of micrometer size and nano-sized second phase, which was caused by the dynamic recrystallization during the ECAP and CEC. The corrosion resistance of alloy was improved. The tensile and corrosion resistance were improved, especially the processed alloy exhibit uniform corrosion performances and decreased corrosion rate. This will provide theoretical ground for Mg-Zn-Y-Nd alloy as vascular stent application. |
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| Keywords: | cyclic extrusion compression equal channel angular pressing extrusion magnesium alloy corrosion |
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