| About this Abstract |
| Meeting |
2025 TMS Annual Meeting & Exhibition
|
| Symposium
|
Advanced Real Time Imaging
|
| Presentation Title |
Time-Resolve X-ray Imaging of Freeze-Thaw Damage in AA7075 |
| Author(s) |
Ankit Kumar, Eshan Ganju, Nikhilesh Chawla |
| On-Site Speaker (Planned) |
Ankit Kumar |
| Abstract Scope |
AA7075 alloy, known for its high specific strength, is widely used in aircraft and marine structures. However, its vulnerability to localized corrosion in chloride-rich environments presents significant challenges, especially under the cyclic environmental exposure typical of aircraft. In these conditions, the alloy is typically exposed to an aqueous chloride-environment at sea level and to subzero temperatures (down to -50°C) at high altitudes, creating a unique freeze-thaw scenario. Our prior results have shown enhanced corrosion and spalling after several hundred freeze-thaw cycles. To investigate the accelerated corrosion mechanisms, we developed an in situ freeze-and-thaw stage for in situ x-ray microtomography experiments. This setup allowed us to observe and analyze the degradation, particularly the spalling of AA7075 alloy during freezing, and to assess the impact of stress on material integrity. Our findings provide novel insights into crack propagation and the mechanisms driving enhanced degradation under cyclic thermal conditions within aggressive seawater environment. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Characterization, Environmental Effects, Aluminum |