About this Abstract |
| Meeting |
2026 TMS Annual Meeting & Exhibition
|
| Symposium
|
Environmentally Assisted Cracking: Theory and Practice
|
| Presentation Title |
Some Key Finding on the Contribution of Hydrogen on Intergranular Fracture in f.c.c. Alloys |
| Author(s) |
Abdelali Oudriss, Jamaa Bouhattate, Xavier Feaugas |
| On-Site Speaker (Planned) |
Xavier Feaugas |
| Abstract Scope |
The interactions of hydrogen with different metallurgical heterogeneities play a key role in hydrogen-assisted plasticity and damage mechanisms in f.c.c. alloys. In the case of nickel-based alloys, grain-boundaries and precipitate state seem to be the two main factors which can be modified to improve the Hydrogen Embrittlement resistance. It is therefore necessary to investigate the nature of the interactions between hydrogen and microstructure features, and their implications for hydrogen-assisted fracture. We firstly illustrate these interactions lead to antagonistic effects (hardening and/or softening), which makes understanding the mechanisms involved in hydrogen-assisted damage relatively complex. In a second time, with multi-scales analyze, we highlighted the importance of hydrogen mobility (short-circuit of diffusion and/or hydrogen transport by dislocations) and its interactions with grain boundaries, precipitates, dislocations and voids in hydrogen-assisted plasticity and fracture processes. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Other, |