About this Abstract |
| Meeting |
2026 TMS Annual Meeting & Exhibition
|
| Symposium
|
Steels in Extreme Conditions
|
| Presentation Title |
Hydrogen Embrittlement in Pipeline Steels with Nano-Precipitates and Degenerated Pearlite |
| Author(s) |
Shiv Kumar, Prita Pant, Nagamani Jaya Balila |
| On-Site Speaker (Planned) |
Shiv Kumar |
| Abstract Scope |
In this study, the effect of the second-phase interfaces on the hydrogen embrittlement of line-pipe steels was examined. The tensile performance of two different grades of ferritic steel with a) nano-sized carbide precipitates (FNP) and b) degenerated pearlite (FDP) was compared under electrochemically charged hydrogen environment. The tensile strength under ambient conditions of these two grades was 957 MPa (FNP) and 694 MPa (FDP), respectively. Changes in strength and elongation to fracture post hydrogen charging (ex-situ as well as in-situ) are compared along with post-mortem analysis of the fracture surface. Custom built in-situ hydrogen charging and test setup was used for the same. Further, fracture toughness studies in in-situ hydrogen charging conditions were carried out to understand the effect of microstructures on fracture behavior. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Iron and Steel, Mechanical Properties, Environmental Effects |