| About this Abstract |
| Meeting |
2025 TMS Annual Meeting & Exhibition
|
| Symposium
|
Additive Manufacturing and Innovative Powder/Wire Processing of Multifunctional Materials
|
| Presentation Title |
Laser Powder Bed Fusion (L-PBF) of NiTi Shape Memory Alloys: Effect of Deposition Parameters and Rescanning on the Microstructure, Texture, and Thermomechanical Behavior |
| Author(s) |
Naiyer Shokri, Sayed Ehsan Sagahaian, Thomas A. Berfield |
| On-Site Speaker (Planned) |
Naiyer Shokri |
| Abstract Scope |
Nitinol, also known as nickel-titanium or Ni-Ti, is a shape memory alloy (SMA) that is highly valued in biomedical and aerospace applications due to its remarkable properties, including the shape memory effect (SME) and superelasticity (SE). This study systematically assesses the impact of laser powder bed fusion additive manufacturing (L-PBF-AM) parameters, specifically laser speed, energy density and the effect of rescanning, on the thermomechanical behavior and microstructure of Ni50.8Ti49.2 SMA performance. Samples were fabricated with hatch spacings and layer thickness of 80 and 40 µm respectively at a constant laser power of 180W and the laser speed differs from 500 mm/s to 800 mm/s, resulting in parts with volumetric energy density levels from 70 to 110 J/mm3. The energy density associated with rescanned parts was 25 J/mm3 and was found to have a strong influence on SME effectiveness. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Additive Manufacturing, Titanium, Powder Materials |