| About this Abstract |
| Meeting |
2024 Annual International Solid Freeform Fabrication Symposium (SFF Symp 2024)
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| Symposium
|
2024 Annual International Solid Freeform Fabrication Symposium (SFF Symp 2024)
|
| Presentation Title |
Machining PBF-L SMAs to Improve Geometrical Accuracy and Surface Quality |
| Author(s) |
Shohom Bose-Bandyopadhyay, Alan Burl, Rodrigo Zapata Martinez, Óscar Contreas Almengor, Jon Molina Aldareguia, Andrés Díaz Lantada, Christopher Saldana, Thomas Kurfess, Kyle S. Saleeby |
| On-Site Speaker (Planned) |
Shohom Bose-Bandyopadhyay |
| Abstract Scope |
Nickel-titanium (NiTi), a shape memory alloy, has high corrosion resistance, high strength, and high biocompatibility and is commonly used to manufacture biomedical stents. Albeit the same properties that make NiTi ideal for stents present difficulties to manufacturing using traditional techniques. To this extent, laser powder bed fusion (PBF-L) has quickly risen as an alternative to produce fine features. However, post-processing by electropolishing/etching is required due to geometric inconsistencies and surface defects inherent to the PBF-L process. During the post-processing steps material is non-preferentially removed from all surfaces, leading to deviation from the designed geometry. Contrarily, traditional machining can be used to achieve uniform material removal from select surfaces. In the present work, linear springs were printed using a PBF-L system and machined to final geometry using a computer numeric controlled (CNC) system. The springs were evaluated for geometric accuracy and shape memory properties. |
| Proceedings Inclusion? |
Definite: Post-meeting proceedings |