| About this Abstract |
| Meeting |
MS&T21: Materials Science & Technology
|
| Symposium
|
Coatings to Protect Materials from Extreme Environments
|
| Presentation Title |
Effects of Laser Remediation Treatments on Global vs Local Environmentally-assisted Cracking of 5xxx Series Aluminum Alloy Ship Plate |
| Author(s) |
Yang Liu, 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 naval applications. However, service exposures at sufficient time/temperature combinations may sensitize the material to corrosion and/or environmentally-assisted cracking (EAC) via precipitation of Mg-rich grain boundary phases. This work determines the effects of service exposure and changes in laser surface remediation treatments (e.g. power, speed) on EAC for service-sensitized 5xxx ship plates. Fracture experiments were conducted in 0.6M NaCl on both service-sensitized and laser remediated ship plate. Changes in crack growth response due to service-sensitization/laser remediation will be presented along with SEM fractography. In addition, the samples have been tested at various thicknesses to isolate the local effects of the laser-treated regions on EAC. Changes in crack growth response due to service-sensitization/laser remediation and samples designed to isolate the laser-treated surface will be presented along with SEM fractography. |