About this Abstract |
Meeting |
2021 TMS Annual Meeting & Exhibition
|
Symposium
|
Environmentally Assisted Cracking: Theory and Practice
|
Presentation Title |
The Impact of Laser Shock Peening Parameters on the Ability to Mitigate Stress Corrosion Cracking in Al-Mg Alloys |
Author(s) |
Eric Dau, William Golumbfskie, Matthew McMahon |
On-Site Speaker (Planned) |
Eric Dau |
Abstract Scope |
Laser shock peening is a technology that has variable ability to impart compressive residual stresses into a material to mitigate stress concentration formation and, potentially, propagation of phenomena such as fatigue and/or stress corrosion cracking. This effect is achieved through bombardment of a water layer on the alloy surface with a laser, which creates plasma as well as a shock wave that travels into the underlying Al-Mg material to deform it to a limited depth. In the current work, we evaluate a range of laser shock peening parameters to determine how well this treatment may be tuned towards mitigating stress corrosion cracking in Al-Mg alloys. These evaluations are carried out in near worst-case crack growth scenarios on specimens of varying sensitization, with the power density and overlap parameters of the LSP processing adjusted to evaluate optimum combinations and treatment efficiency for the intended goal. |
Proceedings Inclusion? |
Planned: |
Keywords |
Aluminum, Environmental Effects, Surface Modification and Coatings |