| About this Abstract |
| Meeting |
2024 TMS Annual Meeting & Exhibition
|
| Symposium
|
Nanostructured Materials in Extreme Environments II
|
| Presentation Title |
Effect of Hydrogen Charging on the Deformation Behavior in Nanostructured Iron |
| Author(s) |
Marlene Kapp, Michael Zawodzki, Stanislav Zak, Bernd Loder, Gregor Mori, Jürgen Eckert, Reinhard Pippan, Oliver Renk, Simon Pillmeier |
| On-Site Speaker (Planned) |
Simon Pillmeier |
| Abstract Scope |
Reversible alloying of ultrafine-grained iron with hydrogen during high pressure torsion was used to stabilize even finer grain sizes in high purity nanocrystalline structures. This enabled not only unique insights how hydrogen changes the deformation behavior of nanostructures, but also allowed to assess pure grain size effects in nanocrystalline iron after effusion of hydrogen. We will show from monotonic and cyclic high pressure torsion experiments, that hydrogen exerts pinning forces on the grain boundaries similarly to conventional alloying elements. However, under certain deformation conditions hydrogen favors inhomogeneous deformation. Thereby, the charging conditions and the dissolved hydrogen concentration play a crucial role. These results provide not only important insights how hydrogen affects the fundamental mechanisms of plasticity in nanostructured materials but also on its role in embrittling high strength materials. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Environmental Effects, |