About this Abstract |
| Meeting |
2026 TMS Annual Meeting & Exhibition
|
| Symposium
|
Environmentally Assisted Cracking: Theory and Practice
|
| Presentation Title |
Laser Desensitization of Sensitized Austenitic Stainless Steels: Process Development and Mechanisms |
| Author(s) |
Bai Cui, Yongchul Yoo, Qiuchi Zhu, Xiang Zhang, Yongfeng Lu |
| On-Site Speaker (Planned) |
Bai Cui |
| Abstract Scope |
Sensitization of austenitic stainless steels may occur in heat affected zones by welding processes, in which Cr-rich carbides precipitation at grain boundaries resulting in Cr depletion regions adjacent to carbides, leading to intergranular corrosion and intergranular stress corrosion cracking. To address this issue, a novel laser desensitization (LDS) technique has been developed by our team using nanosecond pulse laser on the sensitized stainless steel 304. ASTM standard electrochemical and corrosion tests were conducted to assess the effectiveness of LDS, which showed that the LDS-treated samples had a significant improvement in the degree of sensitization as well as less grain boundary attack. TEM analysis of the LDS treated sample revealed no precipitation of Cr-rich carbides at grain boundaries near the surface. |
| Proceedings Inclusion? |
Planned: |