About this Abstract |
Meeting |
2023 TMS Annual Meeting & Exhibition
|
Symposium
|
Environmentally Assisted Cracking: Theory and Practice
|
Presentation Title |
The Impacts of Hydrogen on the Elasticity, Plasticity and Damage Mechanisms of Pure Nickel |
Author(s) |
Abdelali Oudriss, Siva Pasad Murugan, Yasmine Ben Jedidia, Nadjib Iskounen, Marie Landeiro Dos Reis, Jamaa Bouhattate, Xavier Feaugas |
On-Site Speaker (Planned) |
Abdelali Oudriss |
Abstract Scope |
One of the fundamental aspects of hydrogen embrittlement is based on the impact of hydrogen on the elementary mechanisms of plasticity. Though it is well known that hydrogen deteriorates the ductility of nickel, there are antagonistic aspects in the hydrogen effects on plasticity, i.e., hydrogen-induced hardening as well as softening in metallic materials. These antagonist effects can influence the hydrogen-assisted damage mechanisms which can occur for nickel. This work aims to evaluate the impact of hydrogen on the plasticity of pure nickel single crystals, bicrystals and polycristals using different experimental multiscale approaches such as nanoindentation, microtensile and loading-unloading tests coupled to SEM-EBSD. The experimental results obtained were confronted with atomistic calculations in order to question the elementary mechanisms of plasticity in the presence of hydrogen and other defects such as vacancies and grain boundaries. Finally, all these interactions will also be questioned with respect to hydrogen-assisted damage modes. |
Proceedings Inclusion? |
Planned: |
Keywords |
Environmental Effects, Mechanical Properties, Modeling and Simulation |