| About this Abstract |
| Meeting |
MS&T24: Materials Science & Technology
|
| Symposium
|
Advances in Materials and Systems for a Hydrogen Economy
|
| Presentation Title |
The Less Discussed Impact of High Temperature (> 500 °C) Hydrogen Induced Degradation of Austenitic Ni- and Fe-Based Alloys |
| Author(s) |
Rishi Pillai, Marie Romedenne, QQ Ren, Yukinori Yamamoto, J.A. Haynes |
| On-Site Speaker (Planned) |
Rishi Pillai |
| Abstract Scope |
Majority of the research on materials development and evaluation for the envisioned hydrogen-fueled energy landscape has focused on ensuring the safety and reliability of hydrogen pipelines and storage infrastructure. However, hydrogen-fueled power generation technologies, involve high temperatures (500-700 °C pre-combustion and > 800 °C post-combustion) and a mixture of corrosive environments (H2, O2 and H2O) and the role of these conditions has received limited attention in the literature. In the present work, Ni- (Hastelloy X, 282) and Fe-based (347H) alloy specimens were exposed in high temperature atmospheric pressure hydrogen (99.9999999% purity) between 650-800 °C for up to 500h. Post-exposure tensile testing showed a decrease in room temperature ductility except for 347H which showed increased ductility. The observed results will be discussed with the help of microstructural characterization techniques and measured hydrogen uptake. Ultimately, a few preliminary results on the impact of higher pressures on the degradation behavior will be presented. |