| About this Abstract |
| Meeting |
2025 TMS Annual Meeting & Exhibition
|
| Symposium
|
Advanced Biomaterials for Biomedical Implants
|
| Presentation Title |
Influence of Laser Power and Scanning Speed on Performances of LPBF Fe-16Mn-0.7C for Bioabsorbable Stent Applications |
| Author(s) |
Maria Laura Gatto, Paolo Mengucci, Marcello Cabibbo, Diego Mantovani, Carlo Paternoster |
| On-Site Speaker (Planned) |
Maria Laura Gatto |
| Abstract Scope |
Fe-Mn-C alloys have significant applications in developing temporary implants like bioabsorbable stents. Laser powder bed fusion, a promising additive-manufacturing technique, allows tailoring the microstructure by adjusting laser process parameters, expected to improve the degradation rate and mechanical properties of Fe-Mn alloys. In this study, we produced Fe-16Mn-0.7C bulk samples by varying laser power (50÷70 W) and scanning speed (700÷1000 mm/s), while maintaining a constant volumetric energy density (VED) of 90 J/mm³, to understand the effect of printing parameters on the alloy's performances. Fully austenitic microstructure and mechanical properties (microhardness approximately of 300 HV) appear comparable among the different samples. However, the defect analysis via X-ray micro-computed tomography identified an operational window for producing fully dense Fe-16Mn-0.7C bulk samples using LPBF. This operational window resulted in laser parameters much lower than those reported in the literature. Ongoing static and potentiodynamic polarization tests are being conducted to validate the obtained results further. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Biomaterials, Additive Manufacturing, Characterization |