| About this Abstract |
| Meeting |
2024 TMS Annual Meeting & Exhibition
|
| Symposium
|
Environmentally Assisted Cracking: Theory and Practice
|
| Presentation Title |
The Need for Understanding of the Differences Between Environment Assisted Fracture in Conventional Full Immersion Environments and Atmospheric Environments and how Newly Developed Crack Tip In-situ Techniques may Provide Insights |
| Author(s) |
Jenifer S. Locke, Brandon Free |
| On-Site Speaker (Planned) |
Jenifer S. Locke |
| Abstract Scope |
Recent research to understand if conventional laboratory environment assisted cracking (EAC) test environments can properly estimate performance in atmospheric environments imply that research on effects of atmospheric environments is critical for life prediction under certain loading conditions. Constant K and R with varied fatigue loading frequency (f) testing to precisely target changes in crack growth rate due to environments with NaCl containing droplets and varying RH and T to mimic aerospace environments show that for f below ~1 Hz conventional environments are good predictors of crack growth; but at f greater than 1 Hz, acceleration in crack growth rate persists to higher f than predicted by conventional full immersion testing. Results show variable crack growth rates that are likely due to varied degrees to which the crack is filled with electrolyte, which implies that application of recently developed in-situ crack monitoring techniques may improve understanding of EAC in atmospheric environments. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Environmental Effects, Aluminum, Mechanical Properties |