| About this Abstract |
| Meeting |
2025 TMS Annual Meeting & Exhibition
|
| Symposium
|
Environmental Degradation of Additively Manufactured Materials
|
| Presentation Title |
On the Irradiation-Assisted Stress Corrosion Cracking of 316L Stainless Steel Made by Laser Additive Manufacturing |
| Author(s) |
Xiaoyuan Lou, Jingfan Yang, Evan Mcdermott |
| On-Site Speaker (Planned) |
Xiaoyuan Lou |
| Abstract Scope |
The talk highlights our continuing efforts to understand the irradiation-assisted stress corrosion cracking (IASCC) of 316L stainless steel (SS) made by laser additive manufacturing (AM), covering laser powder bed fusion (LPBF) and laser directed energy deposition (DED). The study focuses on the variations of laser processing and post-AM heat treatment on IASCC susceptibility. AM related microstructural features such as dislocation cell structures and precipitates are shown affecting IASCC. Cracking can be intergranular, intragranular, or both depending on the material condition. Stress localization by dislocation channeling and accelerated oxidation at high-stress locations are two major mechanisms leading to IASCC initiation. Dislocation channel broadening is found minimizing crack formation under radiation hardening. While AM microstructure, linked closely to laser processing condition and heat treatment, is a critical factor to IASCC, AM 316L SS compositions (especially minor elements) may need more attentions to create nuclear specification for AM 316L SS. |
| Proceedings Inclusion? |
Planned: |