| About this Abstract |
| Meeting |
2021 TMS Annual Meeting & Exhibition
|
| Symposium
|
Mechanical Response of Materials Investigated through Novel In-situ Experiments and Modeling
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| Presentation Title |
Advanced In-situ Electrochemical Nanoindentation Testing for Understanding Hydrogen-materials Interactions |
| Author(s) |
Verena Maier-Kiener, Anna Ebner, Helmut Clemens, Reinhard Pippan |
| On-Site Speaker (Planned) |
Verena Maier-Kiener |
| Abstract Scope |
Hydrogen embrittlement mechanisms are still controversially discussed, Especially the role of plasticity itself is often underestimated. Hence, the investigation of deformation processes under hydrogen influence is a broad field of research.
In-situ electrochemical nanoindentation became a versatile tool for probing the impact of electrochemical charging on the mechanical properties. Besides measuring hardness and Young’s modulus, deeper insights in the acting deformation mechanisms can be gained by advanced nanoindentation testing methods. The advantages and possibilities of these methods are demonstrated on a precipitation hardened nickel-based alloy.
Generally, a hydrogen-induced hardness increase was visible for all applied strain-rates. The measured increase in strain-rate sensitivity and the decrease in activation volume could be related to short range effects, which can lead to a more localized deformation. Furthermore, the evaluation of the remaining imprints with laser scanning confocal microscopy showed a clear change in the evolution of the plastically deformed zone during hydrogen charging. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Environmental Effects, Mechanical Properties, Characterization |