| About this Abstract |
| Meeting |
2020 TMS Annual Meeting & Exhibition
|
| Symposium
|
Environmentally Assisted Cracking: Theory and Practice
|
| Presentation Title |
Effects of Complex Atmospheric Environments on the Corrosion Fatigue of AA7085-T7451 |
| Author(s) |
Brandon T. Free, Sarah Galyon Dorman, Jason Niebuhr, Jenifer Locke |
| On-Site Speaker (Planned) |
Jenifer Locke |
| Abstract Scope |
Aluminum alloys used in aerospace applications can be exposed to complex atmospheric environments leading to corrosion fatigue (CF) when coupled with cyclic loading. The in-service environments encountered by these alloys are different than typical experimental CF environments and may lead to different per cycle crack growth rates (da/dN) and cracking at lower stress intensity ranges (ΔK). The objective of this work is to quantify and understand the effect of atmospheric exposure parameters such as relative humidity, temperature, ultraviolet light, ozone and fatigue loading frequency on CF of AA7085-T7451 with surface salt contamination. In support of this, da/dN is measured under constant ΔK while varying individual exposure parameters to isolate the effect of each parameter. Additional testing will vary multiple parameters simultaneously to observe synergistic and transient effects. The quantitative data produced in this study will further the understanding of CF in atmospheric environments. |
| Proceedings Inclusion? |
Planned: Supplemental Proceedings volume |