| About this Abstract |
| Meeting |
2025 TMS Annual Meeting & Exhibition
|
| Symposium
|
Steels in Extreme Environments
|
| Presentation Title |
Accelerated Creep Deformation of Steels under Hydrogen Pressure at Elevated Temperature |
| Author(s) |
Du-Hyun Kim, Han-Jin Kim, Ehsan Norouzi, Jin-Yoo Suh, Seok Su Sohn |
| On-Site Speaker (Planned) |
Jin-Yoo Suh |
| Abstract Scope |
At elevated temperature in air, trapped hydrogen inside steel is released lowering the remaining hydrogen concentration in the metal. However, when a steel is exposed to hydrogen pressure at high temperature, hydrogen can be absorbed into the steel with higher concentration than the hydrogen absorbed at room temperature. To evaluate the effect of hydrogen on the deformation behavior of steels at high temperature, a simple equipment for evaluating creep deformation under hydrogen pressure was designed and demonstrated. Creep tests on different steels confirmed shorter creep rupture life at elevated temperature under hydrogen environment than in Ar atmosphere. Hydrogen assisted accelerated failure of a carbon steel was attributed to the dissolution of cementite generating methane bubbles which is well-known as high temperature hydrogen attack. However, other steels also showed accelerated creep failure by hydrogen without any carbide dissolution suggesting high temperature hydrogen embrittlement. Results on different steels will be presented. |
| Proceedings Inclusion? |
Planned: |