| About this Abstract |
| Meeting |
2024 TMS Annual Meeting & Exhibition
|
| Symposium
|
Additive Manufacturing and Innovative Powder/Wire Processing of Multifunctional Materials
|
| Presentation Title |
Functional and Mechanical Behavior of Ultrathin, Porous NiTi Fabricated via Laser Powder Bed Fusion |
| Author(s) |
Londiwe Portia Motibane, Lerato Tshabalala, Devon Devon Hagedorn-Hansen, Silethelwe Chikisha, Thorsten Becker |
| On-Site Speaker (Planned) |
Thorsten Becker |
| Abstract Scope |
Nitinol (NiTi) shape memory alloys are used in a wide range of biomedical applications because of their biocompatibility, shape memory and superelasticity properties and high corrosion resistance. Processing NiTi using additive manufacturing has led to even wider possibilities for the use in the biomedical field. The focus of the study was on producing ultra-thin (strut thickness = 500 microns), porous nitinol structures with varying levels of porosity using Laser Powder Bed Fusion (LPBF). Their functional and mechanical response was characterized. The effect of increased engineered porosity shifted the transformation temperatures higher and widened the hysteresis. As the amount of porosity increased, the compressive strength and the elastic modulus decreased. The size and geometry of lattice unit cells was found to have a significant effect on the mechanical response of these porous structures. All the porous structures had an elastic modulus below 20GPa. This low stiffness makes porous nitinol promising candidates for biomedical implants. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Additive Manufacturing, Biomaterials, Mechanical Properties |