About this Abstract |
Meeting |
2024 TMS Annual Meeting & Exhibition
|
Symposium
|
Chemistry and Physics of Interfaces
|
Presentation Title |
Influence of Grain Boundary Chemistry on Hydrogen Embrittlement and High Temperature Water Corrosion of Stainless Steels |
Author(s) |
Arun Devaraj, Tingkun Liu, Zehao Li, Semanti Mukhopadhyay, Jinhui Tao, Matthew Olszta |
On-Site Speaker (Planned) |
Arun Devaraj |
Abstract Scope |
Simultaneous application of tensile stress and corrosive, high-temperature water on stainless steels leads to an interaction of hydrogen and oxygen with the microstructure which in turn leads to intergranular stress corrosion cracking (SCC). There are no predictive models currently for describing the coupled influence of hydrogen, intergranular oxidation, and deformation on SCC. For developing predictive models for SCC, we test the hypothesis that the grain boundary structure and chemistry of stainless steels can be modified to control the mechanisms of hydrogen embrittlement and intergranular oxidation and corrosion in high-temperature pressurized water. Cryogenic-transfer atom probe tomography coupled with transmission electron microscopy, synchrotron high energy X-Ray diffraction, and in-situ atomic force microscopy are used to test this hypothesis. These new insights are expected to provide the scientific basis for tailoring the microstructure of steels used in nuclear and automotive applications for enhanced resistance to stress corrosion cracking and hydrogen embrittlement. |
Proceedings Inclusion? |
Planned: |
Keywords |
Nuclear Materials, Iron and Steel, Environmental Effects |