About this Abstract |
| Meeting |
MS&T26: Materials Science & Technology
|
| Symposium
|
Lightweight Composites, Materials, and Alloys
|
| Presentation Title |
Closing the Gap: Damage-Tolerant Performance of Additively Manufactured vs. Wrought Ti-6Al-4V. |
| Author(s) |
Tanjore V. Jayaraman |
| On-Site Speaker (Planned) |
Tanjore V. Jayaraman |
| Abstract Scope |
Additively manufactured Ti-6Al-4V is increasingly used in aerospace due to reduced material waste and shorter lead times, yet achieving damage tolerance comparable to wrought alloys remains a key challenge for flight-critical applications. This study evaluates the tensile and fracture-related behavior of direct metal laser melted Ti-6Al-4V in as-built (stress-relieved) and β-annealed conditions. Results are benchmarked against mill-annealed and β-annealed wrought counterparts. Microstructural characterization reveals strong links between prior-β grain morphology, α-lamellar features, and mechanical response. β-annealing transforms the as-built microstructure into a coarser lamellar structure, significantly improving fracture toughness and reducing fatigue crack growth rates while maintaining comparable tensile strength. These findings demonstrate that post-processing can effectively tailor microstructure to achieve damage-tolerant performance. The study highlights a viable pathway for optimizing additively manufactured Ti-6Al-4V to meet aerospace structural requirements, supporting its broader adoption in lightweight, flight-critical components. |