About this Abstract |
| Meeting |
2026 TMS Annual Meeting & Exhibition
|
| Symposium
|
Steels in Extreme Conditions
|
| Presentation Title |
Characterization of Tensile and Fatigue Crack Growth Rate Properties of Two X60 Pipeline Steels in Hydrogen Exposure |
| Author(s) |
Rashiga Walallawita, Matthew Clare Hinchliff, Matthew Scott, Dimitry Sediako |
| On-Site Speaker (Planned) |
Rashiga Walallawita |
| Abstract Scope |
This study investigates the hydrogen embrittlement behaviour of two API X60 grade pipelines from different suppliers, which vary in thickness, manufacturing processes, and chemical compositions. Microstructural analysis using optical microscopy, SEM, and EBSD revealed notable differences resulting from these variations. To evaluate embrittlement susceptibility, Slow Strain Rate Testing (SSRT) and Fatigue Crack Growth Rate (FCGR) testing were performed. SSRT results showed greater embrittlement in the thicker pipeline, while FCGR testing revealed higher crack growth rates in the thinner pipeline at low stress intensity factor range. These findings highlight the limitations of relying solely on SSRT for pipeline assessment and emphasize the value of incorporating fracture mechanics-based methods. The results also underline the importance of evaluating each pipeline material individually, even when classified under the same pipeline grade. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Environmental Effects, Iron and Steel, Other |