About this Abstract |
| Meeting |
MS&T25: Materials Science & Technology
|
| Symposium
|
Lightweight Composites, Materials & Alloys
|
| Presentation Title |
Tailoring damage-tolerant properties of additively manufactured Ti-6Al-4V via post-processing heat treatments |
| Author(s) |
Ralph Bush, Benjamin Smith, Elijah Palm, Tessa Barbosa, Helen Works, Therasa Bush, Leah Watson, Tanjore V. Jayaraman |
| On-Site Speaker (Planned) |
Tanjore V. Jayaraman |
| Abstract Scope |
Additively manufactured Ti-alloys, particularly Ti-6Al-4V, are gaining traction in aerospace applications due to their ability to reduce material waste and lead times. However, achieving damage-tolerant properties of traditionally manufactured alloys remains challenging for flight-critical components. This study characterizes and compares the tensile and damage-tolerant properties of direct metal laser melted Ti-6Al-4V in both as-built (stress-relieved) and post-processed (β-annealed) conditions. The results are benchmarked against those from mill-annealed and β-annealed wrought alloys. Microstructural analysis reveals strong correlations between grain morphology, lamellar structure, and mechanical performance. β-annealing significantly improved fracture toughness and reduced fatigue crack growth rates, offering a viable route for tailoring AM Ti-6Al-4V to meet various aerospace structural requirements. These properties can be achieved while the tensile properties are comparable to those of the existing commercial alloys. The findings highlight the microstructure-informed processing to enhance the design flexibility and damage tolerance of lightweight titanium alloy components produced via additive manufacturing. |