| About this Abstract |
| Meeting |
2025 TMS Annual Meeting & Exhibition
|
| Symposium
|
Additive Manufacturing Fatigue and Fracture: Towards Accurate Prediction
|
| Presentation Title |
High-Cycle and Very-High-Cycle Fatigue Behavior of Additively Manufactured Ti-6Al-4V Alloys and Methods for Future Rapid Qualification |
| Author(s) |
Jake Pierce Scarponi, Anthony G. Spangenberger, Cory Cunningham, Conner Cleek, Diana A. Lados |
| On-Site Speaker (Planned) |
Jake Pierce Scarponi |
| Abstract Scope |
Additively manufactured structural components require extensive fatigue testing to capture the lifetime scatter caused by rogue process defects. Ultrasonic fatigue testing can address the need for rapid characterization by cycling at high frequency to reduce the time/cost associated with fatigue testing and enable measurement of lifetimes up to 1010 cycles within practical timescales. However, the literature is inconsistent as to whether test frequency affects the material’s fatigue response. Frequency effects, including strain rate and environmental effects, may vary depending on the alloy, its microstructure, crack initiation location (surface versus interior), and load amplitude. In this study, systematic fatigue and fractographic studies have been conducted on LPBF Ti-6Al-4V in various heat-treated conditions tested at both low (20 Hz) and high (20 kHz) frequencies. These studies quantify the frequency effect on fatigue life, elucidate whether particular microstructures exhibit differing sensitivities, and provide a basis for confident material qualification for fatigue-critical applications. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Additive Manufacturing, Titanium, Mechanical Properties |