| About this Abstract |
| Meeting |
2021 TMS Annual Meeting & Exhibition
|
| Symposium
|
Fatigue in Materials: Fundamentals, Multiscale Characterizations and Computational Modeling
|
| Presentation Title |
The Effect of Corrosion Location Relative to Local Stresses on the Fatigue Life of Geometrically-complex, Galvanically Corroded AA7075-T6 |
| Author(s) |
Carly Cocke, James T. Burns |
| On-Site Speaker (Planned) |
Carly Cocke |
| Abstract Scope |
Aluminum are used in aerospace structures and are commonly coupled together using stainless steel fasteners. These fastener sites are considered high stress locations due to the geometry of the through-hole acting as a stress concentrator and causing varying local stresses. The high stresses at the fastener sites preferentially initiate coating damage allowing for moisture ingress which can lead to the formation of a galvanic couple between the aluminum alloy and the stainless steel fastener. The corrosion damage and high local stresses from stress concentrators favorably initiate fatigue cracks thus severely reducing the total life of the component. This research is being performed in order to understand the importance of corrosion location and severity relative to a stress concentrator on the fatigue life. Critically, the findings of this work will inform the means by which coatings are evaluated and will serve as a controlled validation experiments for fracture mechanics modeling. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Aluminum, Environmental Effects, Characterization |