| About this Abstract |
| Meeting |
MS&T24: Materials Science & Technology
|
| Symposium
|
Advances in Materials and Systems for a Hydrogen Economy
|
| Presentation Title |
Understanding the Creep Properties of 347H Austenitic Stainless Steels under Hydrogen-Containing Environments |
| Author(s) |
Qing-Qiang Ren, Rishi R Pillai, Yukinori Yamamoto, Yajie Zhao, Jonathan D Poplawsky |
| On-Site Speaker (Planned) |
Qing-Qiang Ren |
| Abstract Scope |
For the envisaged hydrogen economy, many application scenarios would necessitate the structural materials to withstand harsh conditions including but not limited to high temperature and stress loads. This requires a deep understanding of the hydrogen effect on the heat-resistant and creep-resistant alloys, for the purpose of materials evaluation and development. In this work, we studied the influence of hydrogen atmosphere (Ar vs Ar+H2) on the creep rupture properties of a Nb-stabilized 347H austenitic stainless steel at 750 oC and 90 MPa. It showed that the presence of hydrogen atmosphere significantly reduced the creep rupture lifetime. The results will be presented with detailed microstructural characterizations such as precipitation and grain structures. Possible mechanisms of the decreased creep rupture lifetime due to hydrogen will be discussed. This work is sponsored by U.S. Department of Energy, Office of Fossil Energy and Carbon Management through the eXtremeMAT H2 program. |