About this Abstract |
Meeting |
2022 TMS Annual Meeting & Exhibition
|
Symposium
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30 Years of Nanoindentation with the Oliver-Pharr Method and Beyond
|
Presentation Title |
Understanding Rate-depending Plastic Deformation under Hydrogen Influence through Advanced In-situ Electrochemical Nanoindentation |
Author(s) |
Anna Sophie Ebner, Verena Maier-Kiener |
On-Site Speaker (Planned) |
Anna Sophie Ebner |
Abstract Scope |
Despite a lot of research activities, hydrogen embrittlement mechanisms are still controversially discussed. Especially the role of plasticity itself is often underestimated. Hence, the investigation of plastic deformation processes under hydrogen influence is a vital field of research. Nanoindentation strain rate jump tests are used in an in-situ electrochemical nanoindentation setup with the aim of determining the thermally activated deformation parameters. Beside reproducible measurements of standard mechanical properties, such as hardness and Young’s modulus, deeper insight in the acting deformation processes can be gained by calculating strain rate sensitivity and activation volume. A measured increase in strain rate sensitivity and a decrease in activation volume can indicate short-range effects, which can lead to a more localized deformation. In combination with optical evaluation methods, like laser confocal microscopy, the plastically deformed zone around the indents and the changes in slip step characteristics under hydrogen charging can be analysed. |
Proceedings Inclusion? |
Planned: |
Keywords |
Environmental Effects, Copper / Nickel / Cobalt, Characterization |