| About this Abstract |
| Meeting |
2025 TMS Annual Meeting & Exhibition
|
| Symposium
|
Environmentally Assisted Cracking: Theory and Practice
|
| Presentation Title |
About the Implication of Grain Boundaries and Precipitates on the Hydrogen Embrittlement Mechanisms of Nickel Base Alloys |
| Author(s) |
Abdelali Oudriss, Yasmine Ben Jedidia, Siva Murugan, Xavier Feaugas |
| On-Site Speaker (Planned) |
Abdelali Oudriss |
| Abstract Scope |
The study of hydrogen embrittlement (HE) requires a better understanding of the interactions of hydrogen with different metallurgical heterogeneities. These interactions play a key role in hydrogen-assisted plasticity and damage mechanisms. In the case of nickel-based alloys, for example, these interactions lead to antagonistic effects (hardening - softening), which makes understanding the mechanisms involved in hydrogen-assisted damage relatively complex. It is therefore necessary to investigate the nature of these interactions, and their implications for hydrogen-assisted fracture. To this end, we have carried out numerous experimental studies on different nickel alloy microstructures, adopting original in situ and ex situ approaches and coupling different multiphysical and multiscale processes. This work has enabled us to a better understanding of the mechanisms of HE of nickel-based alloys, and has generally highlighted the importance of hydrogen mobility and its interactions with grain boundaries, precipitates, dislocations and voids in hydrogen-assisted plasticity and fracture processes. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Copper / Nickel / Cobalt, Environmental Effects, Mechanical Properties |