About this Abstract |
Meeting |
2024 TMS Annual Meeting & Exhibition
|
Symposium
|
Fatigue in Materials: Fundamentals, Multiscale Characterizations and Computational Modeling
|
Presentation Title |
The Effect of Specimen Thickness on the Fatigue Behavior of AA7075-T651 in Low Water Vapor Environments |
Author(s) |
James Burns, Zach Harris, Adam Thompson, Jake Hochhalter |
On-Site Speaker (Planned) |
James Burns |
Abstract Scope |
The fatigue behavior or AA7075-T651 in low water vapor pressure environments is relevant due to common airframe loading in high altitude environments. Often the bulk environment for fatigue of aluminum is defined using a water exposure parameter (PH2O/f), which factors the partial water vapor pressure in the bulk environment and the frequency of the cyclic loading. Previous studies established an important role of water transport on the crack growth behavior in the low exposure regimes and at intermediate ΔK levels. Critically this finding gives rise to challenges and potentially a loss of similitude due to different molecular transport paths for laboratory specimens and engineering components. This study explores this concept by performing LEFM experiments in various low water vapor pressure levels and with different specimens thicknesses. |
Proceedings Inclusion? |
Planned: |
Keywords |
Mechanical Properties, Environmental Effects, Aluminum |