About this Abstract |
| Meeting |
2026 TMS Annual Meeting & Exhibition
|
| Symposium
|
Advances in Titanium Technology
|
| Presentation Title |
Engineering Ti-6Al-4V Powders for Dual Enhancement in L-PBF Process: Achieving Superior Mechanical Properties via SiO₂-Coating and Cost Reduction via HDH Blending |
| Author(s) |
Jongik Lee, Taehoo Kang, Jimin Han, Ukju Gim, Sehun Kim, Sanghee Jeong, Bin Lee |
| On-Site Speaker (Planned) |
Jongik Lee |
| Abstract Scope |
This study proposes a dual strategy to improve the mechanical properties and flowability of Ti-6Al-4V alloys in the Laser Powder Bed Fusion (L-PBF) process. First, hydrophobic SiO₂ nanoparticles were dry-coated onto spherical Ti-6Al-4V powder to enhance flowability and promote oxide dispersion strengthening (ODS). SEM and EDS analyses confirmed uniform SiO₂ distribution, resulting in specimens with 99.0% relative density, an 8.3% increase in Vickers hardness, and a tensile strength of 1188 MPa, representing an 11.0% improvement compared to spherical Ti-6Al-4V. Furthermore, to increase cost-effectiveness, a 1:1 mixture of SiO₂-coated non-spherical hydride-dehydride (HDH) Ti-6Al-4V powder and spherical powder was prepared. The SiO₂ coating improved the processability of the HDH powder by enhancing its flowability, a common limitation of HDH powder. Specimens from the mixed powder showed >99.0% density and 1308MPa tensile strength with 6.7% elongation. These results show that the proposed strategy effectively balances material performance and economic feasibility in metal additive manufacturing. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Additive Manufacturing, Titanium, Powder Materials |