| About this Abstract |
| Meeting |
2020 TMS Annual Meeting & Exhibition
|
| Symposium
|
Environmentally Assisted Cracking: Theory and Practice
|
| Presentation Title |
Evaluating Stress Corrosion Cracking Performance of 5083 H116 Aluminum as a Function of Material Microstructure |
| Author(s) |
William Golumbfskie, Matthew McMahon, Emily Holcombe, Mitra Taheri |
| On-Site Speaker (Planned) |
William Golumbfskie |
| Abstract Scope |
5xxx aluminum alloys are commonly used in marine applications due to their corrosion resistance coupled with high as-welded strength. A potential concern is that 5xxx alloys can become sensitized in service, which could lead to stress corrosion cracking (SCC). Sensitization occurs when magnesium precipitates out of solution forming a deleterious beta-phase (Mg2Al3) continuously around grain boundaries. Prior work has shown a variation in sensitization rate as a function of processing and resultant material microstructure. This study will attempt to quantify the extent of SCC as a function of sensitization rate for 5083 H116 plate having varied processing parameters. Slow rising stress intensity testing will quantify the effect of sensitization and percent recrystallization on IG-SCC susceptibility through identifying differences in threshold stress intensity in potentiostatic conditions and full seawater immersion. The results of this study will provide insight for an optimized material microstructure for increased resistance to sensitization and SCC. |
| Proceedings Inclusion? |
Planned: Supplemental Proceedings volume |