About this Abstract |
| Meeting |
2026 TMS Annual Meeting & Exhibition
|
| Symposium
|
Environmentally Assisted Cracking: Theory and Practice
|
| Presentation Title |
Nano-Computed Tomography and Nano-XANES Characterization to Understand Transgranular and Intergranular Chloride-Induced Stress Corrosion Cracking Mechanisms |
| Author(s) |
Nathan T. Gehmlich, Duc Thang Nguyen, Jasmyne N. Emerson, Lucille V. Dentice, Haozheng Qu, Xianghui Xiao, Rebecca F. Schaller, Mychailo B. Toloczko, Janelle P Wharry, Maria A. Okuniewski |
| On-Site Speaker (Planned) |
Nathan T. Gehmlich |
| Abstract Scope |
Spent nuclear fuel (SNF) canisters made of austenitic stainless steel (SS) type 304L are susceptible to chloride-induced stress corrosion cracking at ambient temperatures when atmospheric salts deposit on the seam welds. In order to better understand the process of crack propagation within a SNF canister, accelerated stress corrosion tests were conducted by immersing welded 304L SS in a boiling MgCl2 solution. In an ex-situ examination of cracking mechanisms from these corrosion tests, sections of cracks and cracks tips were examined using nano-computed tomography (nano-CT) and 3D nano-x-ray absorption near edge structure (nano-XANES) at the 18-ID beamline at the National Synchrotron Light Source II. From nano-CT, the morphologies of intergranular (IG) and transgranular (TG) type cracks are compared and the corresponding mechanisms are discussed. The corrosion products and chemical differences of IG and TG cracks are also discussed from the 3D nano-XANES technique. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Iron and Steel, Other, Other |