| About this Abstract |
| Meeting |
2024 TMS Annual Meeting & Exhibition
|
| Symposium
|
Advanced Biomaterials for Biomedical Implants
|
| Presentation Title |
Hybrid Manufacturing of Superelastic Arterial Stents |
| Author(s) |
Peter Ibrahim, Moataz M. Attallah |
| On-Site Speaker (Planned) |
Peter Ibrahim |
| Abstract Scope |
The use of additive manufacturing (AM), especially Laser Powder Bed Fusion (L-PBF) technology, has been explored to manufacture metallic stents from NiTi and 316L stainless steel. Nonetheless, L-PBF fails to achieve the required tolerances and performance. In this work, a hybrid (additive+subtractive) manufacturing approach was developed to manufacture customised stents from a Ni-free superelastic β-Titanium alloy, first using L-PBF followed by laser micro-machining to improve the component tolerances. L-PBF parameters were optimised to achieve >99% dense tubes with controlled surface roughness. Tubes surface roughness and cell attachment properties were further improved using electropolishing. A complex open stent design was cut out of the tubes using laser micromachining with high accuracy. FE modelling of stent deployment predicted that stent deformation range could be increased from 40 to 75% by optimising the strut thickness,. The developed approach opens opportunities to create customised Ni-free stents for complex stenosis conditions. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Additive Manufacturing, Biomaterials, Modeling and Simulation |