| About this Abstract |
| Meeting |
2023 TMS Annual Meeting & Exhibition
|
| Symposium
|
Phase Transformations and Microstructural Evolution
|
| Presentation Title |
Investigating the Effect of L-PBF Process Parameters on 3D Printed Nitinol Part Properties |
| Author(s) |
Josiah Cherian Chekotu, Dermot Brabazon |
| On-Site Speaker (Planned) |
Josiah Cherian Chekotu |
| Abstract Scope |
Laser Powder Bed Fusion (L-PBF) is an effective method to fabricate Nitinol with desirable functional and mechanical properties. The process parameters and thermal gradients are critical for obtaining the correct phase structure for shape memory capabilities. In this work, multiple Nitinol samples were 3D printed with varying laser power, scan speed, hatch spacing and layer thickness. The energy densities and thermal gradients were found to influence the physical, mechanical and thermal characteristics of the samples. Mechanical characteristics of the printed samples were investigated through cyclic compression and impact testing. The strain recoveries and latent heat regenerations were monitored using Digital Image Correlation and IR thermal imaging techniques. Thermal expansion properties were investigated via dilatometry. The microstructure, phase properties, and phase transformation behavior were also explored through SEM/EDX, nanoindentation, XRD, DSC, and EBSD. This study aids to fabricate Nitinol parts with tailored mechanical and functional properties. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Phase Transformations, Mechanical Properties, Characterization |