| About this Abstract |
| Meeting |
2024 TMS Annual Meeting & Exhibition
|
| Symposium
|
Environmentally Assisted Cracking: Theory and Practice
|
| Presentation Title |
Freeze-thaw Induced Damage Evolution in AA7075-T651 |
| Author(s) |
Ankit Kumar, Eshan Ganju, Nikhilesh Chawla |
| On-Site Speaker (Planned) |
Ankit Kumar |
| Abstract Scope |
High-strength aluminum alloys are widely used in aircraft and naval applications. Unfortunately, they are also susceptible to localized corrosion in chloride-containing environments. The cyclic exposure of aircraft structures to corrosive conditions, from ambient conditions on the tarmac to freezing conditions (~ -50˚C) in flight, can significantly impact the extent and mechanisms for localized corrosion around intermetallic phases, potentially compromising structural integrity. In this work, we report on time-dependent degradation of AA7075-T651 alloy under cyclic freeze-thaw conditions in a chloride-containing environment. In situ 3D x-tomography was employed to analyze the evolution of surface roughness, corrosion product layer thickness, and trenching around intermetallic phases over hundreds of freeze-thaw cycles. Unique insights into the evolution of corrosion induced morphology in comparison to continuous immersion in an aqueous chloride environment, exposure to air, and the interface between air and chloride solution under freeze-thaw conditions will be discussed. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Environmental Effects, Aluminum, Characterization |