| About this Abstract |
| Meeting |
2025 TMS Annual Meeting & Exhibition
|
| Symposium
|
Additive Manufacturing Fatigue and Fracture: Towards Accurate Prediction
|
| Presentation Title |
Improving the Fatigue Resistance of Laser Powder Bed Fusion Components by Cavitation Abrasive Waterjet Finishing: Surface Texture and Residual Stress |
| Author(s) |
Rohin Petram, Conall Wisdom, Alex Montelione, Cole Nouwens, Dan Sanders, Mamidala Ramulu, Dwayne D. Arola |
| On-Site Speaker (Planned) |
Dwayne D. Arola |
| Abstract Scope |
Despite the promise of Laser Powder Bed Fusion (L-PBF) for the manufacture of components across the aerospace and medical industries, the surface texture and surface integrity are considered detrimental to fatigue performance. Existing methods of post-processing for improving the surface texture and residual stress simultaneously are limited. This investigation explores cavitation abrasive surface finishing (CASF) for the surface treatment of Ti6Al4V components produced by L-PBF. The CASF process utilizes a high-pressure waterjet and abrasive slurry to achieve a combination of material removal and peening treatment. Results show that CASF improves the surface roughness from the as-built condition (Ra=15 µm) to as low as 3 µm, reduces the effective stress concentration posed by the profile valleys, and introduces a compressive residual stress of up to 600 MPa. Results show that fatigue resistance is improved by the CASF process, but that there are distinct differences of the upskin and downskin surfaces. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Additive Manufacturing, Mechanical Properties, Titanium |