About this Abstract |
| Meeting |
2026 TMS Annual Meeting & Exhibition
|
| Symposium
|
Advances in Magnetism and Magnetic Materials
|
| Presentation Title |
The Effect of Processing Parameters on the Microstructure and Magnetic Properties of Near‑Net‑Shape NdFeB Permanent Magnets Manufactured by Direct Energy Deposition |
| Author(s) |
Hyun Suk Choi, Youliang He, Yu Zou |
| On-Site Speaker (Planned) |
Hyun Suk Choi |
| Abstract Scope |
NdFeB permanent magnets are indispensable components of traction motors in electric vehicles and power generators in windmills, which are normally manufactured by sintering and hot deformation. Directed Energy Deposition (DED) offers an alternative manufacturing method for NdFeB magnets to enable flexible design, accelerated material discovery, and in-situ investigations. However, DED-fabricated NdFeB magnets often exhibit inferior magnetic performance due to the defects and undesirable microstructure formed in the processing. Current issues include undesirable α-Fe phase formation, heterogeneous phase distribution, and grain coarsening, which degrade magnetic performance. This research aims to understand how the DED parameters influence the microstructure and magnetic properties of the NdFeB magnets. Parameters like energy density and thermal gradients are varied to study their effects on the formation of the magnetic phase (Nd2Fe14B). The results help better understand how the microstructure can be controlled through process design, leading to better magnetic performance of the DED-fabricated NdFeB magnets. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Additive Manufacturing, Magnetic Materials, Characterization |