| About this Abstract |
| Meeting |
2025 TMS Annual Meeting & Exhibition
|
| Symposium
|
Environmentally Assisted Cracking: Theory and Practice
|
| Presentation Title |
Efficacy of Laser Surface Treatment on Corrosion-Induced Fatigue of AA5456-H116 Alloys in Humid Air Environment |
| Author(s) |
Rajaguru Jeyamohan, Mohammed Shabana, Ji Ma, James Burns |
| On-Site Speaker (Planned) |
Rajaguru Jeyamohan |
| Abstract Scope |
AA50546-H116 alloys are widely used in marine environments due to their excellent mechanical strength and corrosion resistance. However, the presence of detrimental beta (Al3Mg2) precipitates along grain boundaries makes these materials susceptible to intergranular corrosion and corrosion fatigue. This work investigates the efficacy of laser surface treatment (LST) in mitigating corrosion-induced fatigue of AA5456-H116 aluminum alloys in humid air environments. The study encompasses a multifaceted approach, involving fatigue testing under corroded non-LST and LST conditions, along with a detailed analysis of corrosion severity impact on fatigue behavior through 0.6M NaCl solution. The results demonstrate that LST characterized by Zinc dots or Continuous Wave, effectively enhances corrosion-induced fatigue resistance relative to non-LST conditions. This enhancement is attributed to the beneficial effects of optimized LST in improving the corrosion resistance near the surface, thereby reducing the deleterious impact of corrosion-generated features that are responsible for drastic fall of fatigue initiation life. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Environmental Effects, Aluminum, Mechanical Properties |