| About this Abstract |
| Meeting |
2025 TMS Annual Meeting & Exhibition
|
| Symposium
|
Materials for Sustainable Hydrogen Energy
|
| Presentation Title |
High Temperature Hydrogen Degradation of Structural Materials of Nuclear-Hydrogen Generating Systems |
| Author(s) |
Jun Yeong Jo, Hwasung Yeom |
| On-Site Speaker (Planned) |
Jun Yeong Jo |
| Abstract Scope |
Recently, the hydrogen production using nuclear energy has drawn lots of attention. However, since this hydrogen production systems operate in aggressive environments (i.e., high temperature steam and hydrogen), there are the complex degradation modes of structural components. The exposure to these harsh environments could compromise the high-temperature integrity, shorten the operational lifespan, and potentially leading to brittle fracture associated with thermal fatigue. This fatigue could be prevalent while the system experiences on-off operational thermal cycles. This study presents experimental evaluations of the hydrogen degradation characteristics of most common structural materials such as stainless steels and Ni-alloys. The alloys are exposed to under harsh conditions (ranging from 650 °C to 900 °C, with a hydrogen concentration of 10% to 90%, and a steam atmosphere of 90% to 10%). Then the microstructural evolution and mechanical strength (tensile strength and toughness) were evaluated. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Sustainability, Nuclear Materials, Mechanical Properties |