| About this Abstract |
| Meeting |
2024 TMS Annual Meeting & Exhibition
|
| Symposium
|
Magnesium Technology 2024
|
| Presentation Title |
Processing and Characterization of Mg Microtubes for Biodegradable Vascular Stents |
| Author(s) |
Joung Sik Suh, Chang Dong Yim, Byeong-Chan Suh, Ha Sik Kim, Sang Eun Lee, Hwa-Chul Jung |
| On-Site Speaker (Planned) |
Joung Sik Suh |
| Abstract Scope |
Magnesium (Mg) alloys have attracted increasing attention as potential metallic biomaterials for temporary biodegradable implants in orthopedic and vascular applications due to their mechanical, electrochemical and biological properties. However, Mg scaffolds still face some challenges such as high degradation rate, low mechanical properties, difficult fabrication method, and some biocompatibility issues. Processing and alloying are key approaches to improving the comprehensive properties of Mg alloys for biomedical applications. This study investigated the microstructure, texture and mechanical properties of Mg-Zn-Ca (MZ01) microtubes fabricated by two-step extrusion for biodegradable vascular stents. Direct two-step extrusion at 400 °C produced seamless MZ01 microtubes with outer diameters of 3.5 and 2.5 mm, wall thickness of 250 µm, and maximum length of 2 m. Dimensional accuracy based on roundness improved as outer diameter decreased. Increasing the extrusion ratio made grains refiner and weakened texture intensity. The mechanical behavior of MZ01 microtubes was analyzed with respect to changes in microstructure and texture. Grain boundary strengthening and texture hardening were involved in the plasticity of as-extruded MZ01 microtubes. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Magnesium, Biomaterials, Process Technology |