About this Abstract |
| Meeting |
MS&T25: Materials Science & Technology
|
| Symposium
|
Advances in Materials and Systems for a Hydrogen Economy
|
| Presentation Title |
Debunking generalizations regarding interactions of hydrogen with Fe- and Ni-based alloys at temperatures > 400°C |
| Author(s) |
Rishi Pillai, Marie Romedenne, Dean Pierce, J.A. Haynes |
| On-Site Speaker (Planned) |
Rishi Pillai |
| Abstract Scope |
To ensure the safety and reliability of the hydrogen pipelines and storage infrastructure, majority of the research has focused on hydrogen-material interactions at cryogenic and room temperatures. Hydrogen-fueled power generation and transportation technologies, involve high temperatures (400-700°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, steel (4140) and Ni-base (Hastelloy X, 282, R-41, 31V) alloy specimens were exposed in high temperature atmospheric pressure hydrogen (99.99999% purity) between 450-800°C for up to 3000h. Post-exposure tensile testing was conducted at room temperature to quantify the impact on ductility. Additionally, a few preliminary results of the in-situ mechanical testing in flowing hydrogen at different hydrogen pressures (1-20 bar) between 400-800°C will be presented.The observed results will be discussed with the help of microstructural characterization techniques and measured hydrogen uptake. |