| About this Abstract |
| Meeting |
2025 TMS Annual Meeting & Exhibition
|
| Symposium
|
Materials for Sustainable Hydrogen Energy
|
| Presentation Title |
Role of Cyclic Predeformation on Hydrogen Embrittlement in an Austenitic Stainless Steel |
| Author(s) |
Vishnu Anilkumar, Frans Palmert, Lars Nyborg, Johan Ahlström, Yu Cao |
| On-Site Speaker (Planned) |
Vishnu Anilkumar |
| Abstract Scope |
Hydrogen fueled gas turbines hold tremendous potential for a sustainable energy future. Knowledge regarding the influence of hydrogen on the material properties is of key importance in material selection and mechanical integrity predictions for hydrogen exposed gas turbine components. It is often the fatigue loading associated with the start/stop cycle of the gas turbine which limits the service-life of the components. It is thus vital to understand how hydrogen exposure affects fatigue resistance, especially in the low cycle regime (<100 000 cycles). In this context, room temperature Low Cycle Fatigue (LCF) testing was performed in air on hydrogen charged metastable austenitic stainless-steel specimens. To investigate the influence of inelastic deformation on the hydrogen uptake, some of the specimens were subjected to precycling at varied strain amplitudes before pre-charging. Loss in mechanical properties was correlated to microstructure through scanning electron microscopy (SEM),electron channeling contrast imaging (ECCI), and XRD. |
| Proceedings Inclusion? |
Planned: |