| About this Abstract |
| Meeting |
MS&T21: Materials Science & Technology
|
| Symposium
|
Advanced Coatings for Wear and Corrosion Protection
|
| Presentation Title |
Effects of Laser Remediation Treatments on Environmentally-assisted Cracking of 5xxx Aluminum Alloys and Ship Plates |
| Author(s) |
Yang Liu, Benjamin C Palmer, John J Lewandowski |
| On-Site Speaker (Planned) |
Yang Liu |
| Abstract Scope |
5xxx series Al-Mg alloys are solid solution strengthened by Mg and used in a variety of applications due to their good strength, weldability and corrosion resistance. However, thermal exposures at sufficient time/temperature combinations may sensitize the material to corrosion and/or environmentally-assisted cracking (EAC) via the precipitation of Mg-rich phases at grain boundaries. In this work, the effects of sensitization treatments and changes in laser surface remediation treatments (e.g. power, speed) on EAC have been determined for laboratory-sensitized and service-sensitized 5xxx ship plates. Fracture experiments were conducted in 0.6M NaCl on both sensitized and laser remediated materials. The changes in crack growth response due to sensitization/laser remediation will be presented along with SEM fractography. |