About this Abstract |
Meeting |
2021 TMS Annual Meeting & Exhibition
|
Symposium
|
Environmentally Assisted Cracking: Theory and Practice
|
Presentation Title |
Understanding the Effects of β-phase Precipitation on the Stress Corrosion Cracking Performance of Thin Plate 5xxx Alloys |
Author(s) |
William Golumbfskie, Matthew McMahon, Emily Holcombe, Mitra Taheri |
On-Site Speaker (Planned) |
William Golumbfskie |
Abstract Scope |
5xxx aluminum alloys provide a combination of corrosion resistance and high as-welded strength, making them well suited for marine applications. Under certain conditions, the corrosion resistance can be negated due to sensitization through the formation of a deleterious β-phase (Mg3Al2). It has been established that the processing latitude afforded these alloys in the H116 temper can produce a product form with considerable variations in microstructure and dislocation density. These variations have a significant effect on the kinetics and location of β-phase formation. This work will link β-phase precipitation variation due to processing with susceptibility to stress corrosion cracking for thin plate. Slow rising stress intensity testing is used to quantify the effects of material microstructure and β-phase formation on IG-SCC susceptibility through identifying differences in threshold stress intensity in potentiostatic conditions and full seawater immersion. The results of this study will help identify microstructural conditions for increased resistance to SCC. |
Proceedings Inclusion? |
Planned: |
Keywords |
Aluminum, Environmental Effects, |