| About this Abstract |
| Meeting |
2024 TMS Annual Meeting & Exhibition
|
| Symposium
|
Environmentally Assisted Cracking: Theory and Practice
|
| Presentation Title |
Effect of Chloride Concentration on the Atmospheric Environment-assisted Cracking Behavior of Sensitized AA5083-H131 |
| Author(s) |
Zachary D. Harris, Patrick J Steiner, James T. Burns |
| On-Site Speaker (Planned) |
Zachary D. Harris |
| Abstract Scope |
The influence of chloride concentration on the environment-assisted cracking (EAC) behavior of sensitized AA5083-H131 in atmospheric environments was investigated using high fidelity fracture mechanics-based testing and concurrent electrochemical potential measurements. EAC susceptibility was found to increase across all environments as chloride concentration increased. However, for a given chloride concentration, EAC susceptibility decreased across all chloride concentrations as cathodic limitation due to solution geometry effects increased. A close correlation between the OCP of the bulk surface and the crack growth kinetics was also observed across all environments and chloride concentrations, with higher chloride concentrations and cathodic limitations resulting in larger changes in electrochemical potential. This correlates well with known electrochemical potential-dependent EAC observations for these alloys. Based on this electrochemical potential dependence, the efficacy of metal-rich primers to mitigate EAC of sensitized AA5083-H131 under atmospheric conditions is then assessed. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Aluminum, Environmental Effects, Mechanical Properties |