About this Abstract |
| Meeting |
2026 Annual International Solid Freeform Fabrication Symposium (SFF Symp 2026)
|
| Symposium
|
2026 Annual International Solid Freeform Fabrication Symposium (SFF Symp 2026)
|
| Presentation Title |
Designing & Printing Dispersion Strengthened Ti-6Al-4V via Laser Powder Bed Fusion Additive Manufacturing |
| Author(s) |
Amaranth Karra, Tirthesh Ingale, Sivaji Karna, Shreya Mukherjee, Ravisankar Haridas, Rajarshi Banerjee, Anthony D. Rollett, Rajiv S. Mishra, Hector R. Siller |
| On-Site Speaker (Planned) |
Amaranth Karra |
| Abstract Scope |
The anisotropy of the mechanical properties of Ti-6Al-4V additively manufactured (AM) via laser powder bed fusion (PBF-LB) is increased by the long and textured columnar prior β grains that typically occur despite the high cooling rates. This work explores the designing and printing of yttria (Y2O3) dispersion hardened Ti-6Al-4V with minimal powder feedstock preparation. A uniformly dispersed bimodal distribution of Y2O3 in the Ti-6Al-4V matrix decreases the transverse size of the prior β grains. Furthermore, STEM bright field micrographs reveal dispersoid pinning of dislocations and STEM EDS confirms that the dispersoids are Y2O3 as expected. A modest increase in room temperature microhardness is observed and room temperature nanoindentation creep results show a ∼ 64% lower mean creep rate compared to standard PBF-LB Ti-6Al-4V. This work successfully demonstrates the use of PBF-LB to fabricate ODS Ti-6Al-4V with minimal feedstock preparation enabling refinement of the prior β grain and improved mechanical properties. |
| Proceedings Inclusion? |
Undecided |