| About this Abstract |
| Meeting |
2023 TMS Annual Meeting & Exhibition
|
| Symposium
|
Phase Stability in Extreme Environments
|
| Presentation Title |
Revisiting the Atomic Scale Mechanisms of Stress Corrosion Cracking of Fe-based Alloys with State-of-the-Art Microscopy and Computational Modelling |
| Author(s) |
Arun Devaraj, Dallin Barton, Tingkun Liu, sten Lambeets, Cheng-han Li, Tanvi Ajantiwalay, Mark Wirth, Daniel Perea, Jinhui Tao, matthew Olszta, Maria Sushko |
| On-Site Speaker (Planned) |
Arun Devaraj |
| Abstract Scope |
When stainless steel is subjected simultaneously to an applied tensile stress and a corrosive, high-temperature aqueous medium, interplay of hydrogen and oxygen interactions with the alloy microstructure are thought to lead to intergranular stress corrosion cracking (SCC). Using novel in situ experiments in atom probe tomography, atomic force microscopy, nanomechanical testing and synchrotron high-energy x-ray diffraction, complemented with ex situ transmission electron microscopy and computational simulations, we develop an atomic scale understanding of this mechanochemical coupling during SCC of Fe-Cr-Ni model alloys. The structure and composition of oxide layers, elemental partitioning including hydrogen segregation at the oxide-metal interfaces and grain boundaries, and deformation-induced defects were revealed as a function of applied deformation. These new insights are expected to provide the scientific basis for tailoring the microstructure of Fe-based alloys used in nuclear and automotive applications for enhanced resistance to stress corrosion cracking and hydrogen embrittlement. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Environmental Effects, Nuclear Materials, Iron and Steel |