About this Abstract |
| Meeting |
2026 TMS Annual Meeting & Exhibition
|
| Symposium
|
Advances in Titanium Technology
|
| Presentation Title |
Mechanofusion-based Fabrication of Y₂O₃-reinforced Ti-6Al-4V Powders for L-PBF process |
| Author(s) |
Sanghee Jeong, Ukju Gim, Sehun Kim, Taehoo Kang, Jongik Lee, Jimin Han, Bin Lee |
| On-Site Speaker (Planned) |
Sanghee Jeong |
| Abstract Scope |
Oxide dispersion strengthening (ODS) with Y₂O₃ was applied to enhance the mechanical strength and high-temperature stability of Ti-6Al-4V alloy fabricated by Laser Powder Bed Fusion (L-PBF). Composite powders were prepared by dry-coating spherical Ti-6Al-4V powders with Y₂O₃ using a mechanofusion process via the Nobilta NOB-130, which imparts high-energy shear and impact forces. Powder flowability and morphology were examined, followed by L-PBF fabrication. Density and microstructure analyses were conducted to optimize processing parameters and investigate Y₂O₃ distribution. Further analysis using EDS, TEM, and atom probe tomography (APT) confirmed that Y₂O₃ particles were uniformly dispersed below 10 nm. It was also confirmed that the coating was well maintained after Nobilta mixing and L-PBF processing. Mechanical testing revealed that Y₂O₃ addition increased tensile strength from 995.2 MPa to 1071.1 MPa (7.6% increase), while reducing elongation from 14.8% to 12.6% (15.2% decrease). This study demonstrates that mechanofusion-based ODS improves Ti-6Al-4V mechanical properties. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Additive Manufacturing, Composites, Mechanical Properties |