| About this Abstract |
| Meeting |
2022 TMS Annual Meeting & Exhibition
|
| Symposium
|
Environmentally Assisted Cracking: Theory and Practice
|
| Presentation Title |
The Effect of Loading Rate on the Environment-assisted Cracking Behavior of Sensitized AA5456-H116 |
| Author(s) |
Zachary D. Harris, James T. Burns |
| On-Site Speaker (Planned) |
Zachary D. Harris |
| Abstract Scope |
The influence of the applied loading rate (dK/dt) on the environment-assisted cracking (EAC) behavior of sensitized AA5456-H116 in 0.6 M NaCl at applied potentials ranging from -800 to -900 mVSCE is assessed via a rising-K testing framework. Results demonstrate that the effect of dK/dt is dependent on the applied potential, with minimal influence noted for potentials more positive than -830 mVSCE, while a stronger dK/dt-dependence is observed for potentials more negative than -830 mVSCE. This applied potential dependence is found to be consistent with the established mechanism for EAC in sensitized 5xxx-series aluminum alloys exposed to marine environments. Crack growth rates measured using rising versus static K testing are then compared, demonstrating that rising K methods consistently yield conservative EAC metrics with increased efficiency. The implications of these results are then discussed in the context of current standardized approaches for quantifying EAC susceptibility. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Aluminum, Environmental Effects, Mechanical Properties |