About this Abstract |
| Meeting |
2026 TMS Annual Meeting & Exhibition
|
| Symposium
|
Advances in the State-of-the-Art of High Temperature Alloys
|
| Presentation Title |
Unraveling Hydrogen Effects in Superalloys |
| Author(s) |
Steffen Neumeier, Oliver Nagel, Massimo Fritton, Alexander Mutschke, Martin Spörlein, Andreas Stark, Denis Sheptyakov, Carmen Höschen, Peter Felfer, Ralph Gilles |
| On-Site Speaker (Planned) |
Steffen Neumeier |
| Abstract Scope |
Superalloys are critical high-performance materials used in aerospace and chemical processing industries. Components in the oil and gas sector, as well as gas turbines for power generation, may be exposed to hydrogen, especially as it gains importance as an energy carrier. While superalloys are known for their exceptional mechanical properties and resistance to extreme conditions, their interaction with hydrogen poses significant challenges, highlighting the need to understand these effects.
This study investigates hydrogen distribution and hydrogen embrittlement in superalloys using synchrotron and neutron diffraction, atom probe tomography, NanoSIMS measurements, and analysis of fractured tensile samples. Thermal desorption spectroscopy sheds light on microstructural influences on hydrogen diffusivity. Findings indicate that hydrogen dissolves interstitially in the single fcc γ phase, while the γ' phase absorbs more hydrogen than γ in two-phase microstructures. This differential behavior impacts mechanical properties, promoting crack initiation and propagation at phase boundaries, particularly in the presence of hydrogen. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
High-Temperature Materials, Copper / Nickel / Cobalt, |