| About this Abstract |
| Meeting |
2025 TMS Annual Meeting & Exhibition
|
| Symposium
|
Fatigue in Materials: Fundamentals, Multiscale Characterizations and Computational Modeling
|
| Presentation Title |
Characterization of Fatigue Crack Propagation and Residual Stresses in Additive Friction Stir-Deposited AA6061 |
| Author(s) |
Ralph Schultz, Sadie Beck |
| On-Site Speaker (Planned) |
Ralph Schultz |
| Abstract Scope |
This work investigates the fatigue crack growth properties and the residual stresses of additive friction stir-deposited (AFSD) AA6061. In this solid-state process, feedstock material is stirred into the layer below it, depositing material layer-wise to create a desired, fully dense geometry. Using this additive technique, a box-patterned build was constructed, and next-layer entry points distributed to maintain symmetry of thermo-mechanical residual stress generation. To determine if crack retardation is directionally dependent for this material and process, compact fatigue crack growth specimens are extracted from the printed builds such that pre-cracks are oriented along and perpendicular to the printed layer interfaces. Fatigue crack growth rate properties perpendicular and parallel to the build direction and perpendicular and parallel to the wrought material L and LT direction are obtained for comparison of material properties. Fracture surfaces were examined, and morphologies defined. Residual stresses were mapped and their impact on fatigue crack growth examined. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Additive Manufacturing, Aluminum, Characterization |