| About this Abstract |
| Meeting |
2024 TMS Annual Meeting & Exhibition
|
| Symposium
|
Additive Manufacturing Fatigue and Fracture: Towards Rapid Qualification
|
| Presentation Title |
Fatigue Performance and DADT Certification of Powder-bed Additively Manufactured Ti-6Al-4V: Defect Assessments, EIDS Distributions, and Inspection Limits |
| Author(s) |
Matthew Krug, Sushant K. Jha, Reji John, Patrick Golden, Luke Sheridan, Bryce Jolley |
| On-Site Speaker (Planned) |
Sushant K. Jha |
| Abstract Scope |
The US Air Force relies upon the Equivalent Initial Damage Size (EIDS) distribution to characterize the quality of an aircraft structure upon manufacture. Although several decades of experience with this approach informs certification of structural components produced by conventional fabrication modes, at present there is little available published EIDS data for powder bed fusion (PBF) additively manufactured (AM) metals. In this work we report on our measurements of EIDS distribution data for PBF AM Ti-6Al-4V. EIDS distributions are in development with respect to fabrication modality (laser- vs. electron-beam energy source), orientation, surface condition, heat treatment, and other variables. To assess the nature of the crack-nucleating defect and to relate its size to the measured EIDS value, a series of destructive and non-destructive characterization activities is undertaken, including computed tomography, profilometry, and serial sectioning, among others. The results are compared with data developed in parallel for mill-annealed Ti-6Al-4V forgings. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Additive Manufacturing, Mechanical Properties, Titanium |