| About this Abstract |
| Meeting |
2020 TMS Annual Meeting & Exhibition
|
| Symposium
|
Additive Manufacturing: Processing Effects on Microstructure and Material Performance
|
| Presentation Title |
Microstructure and Mechanical Properties of Porous Mg Scaffolds Fabricated by Additive Manufacturing for Biomedical Applications |
| Author(s) |
Muzi Li, Thomas Derra, Alexander Kopp, Jon M. Molina-Aldareguía, Javier Llorca |
| On-Site Speaker (Planned) |
Javier Llorca |
| Abstract Scope |
Magnesium alloys exhibit promising properties as bone implant materials due to their biodegradability, non-toxicity and mechanical properties. Porous scaffolds are ideal structures for bone regeneration as they allow tissue growth.
Lattice structures of Mg-RE alloy with different strut sizes were manufactured by Laser Powder Bed Fusion (LPBF) process. After processing and heat treatments, the lattices were protected against corrosion by plasma electrolytic oxidation. The relationship between processing conditions and the microstructure was carefully analysed by XCT, SEM, EBSD and TEM. In addition, the mechanical properties and the fracture mechanisms were ascertained by means of in situ compression tests within an X-ray µtomography system in lattices that have been immersed in simulated body fluids for different time periods. These results were used to ascertain the influence of processing parameters, lattice dimensions and heat treatments on the mechanical properties and corrosion resistance of lattice structures of Mg-RE alloys manufactured by LPBF. |
| Proceedings Inclusion? |
Planned: Supplemental Proceedings volume |