| About this Abstract |
| Meeting |
2022 TMS Annual Meeting & Exhibition
|
| Symposium
|
Additive Manufacturing and Innovative Powder Processing of Functional and Magnetic Materials
|
| Presentation Title |
Process-structure-property Relationships in Laser Powder Bed Fusion of Permanent Magnetic Nd-Fe-B |
| Author(s) |
Julan Wu, Nesma T. Aboulkhair, Michele Degano, Richard Hague, Ian Ashcroft |
| On-Site Speaker (Planned) |
Julan Wu |
| Abstract Scope |
We present a parametric study on the laser powder bed fusion (L-PBF) of Nd-Fe-B magnet. The microstructure and the magnetism of the L-PBF Nd-Fe-B were also studied. Consequently, the issues encountered with utilising L-PBF for the production of relatively high-density Nd-Fe-B magnetics are elucidated and discussed. Furthermore, new insights on the geometrical constraints on the shape complexity and design freedom during L-PBF of this material are presented. High-density samples with remanence of 0.65T and maximum energy product of 62 kJ/m3 were successfully produced, whilst demonstrating the integrity of the parts was affected by the scan speed and hatch distance; in addition, the sample’s size and geometry were also found to influence the success of building within the LPBF system. The relative density and integrity of the produced samples were mainly constrained by the intrinsic brittle mechanical property of intermetallic Nd2Fe14B phase and the liquation cracking induced during laser processing. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Additive Manufacturing, Magnetic Materials, Other |