About this Abstract |
Meeting |
2023 TMS Annual Meeting & Exhibition
|
Symposium
|
Environmentally Assisted Cracking: Theory and Practice
|
Presentation Title |
Some Recent Advances on Hydrogen Embrittlement in Martensitic Steels: From Diffusion and Trapping of Hydrogen to Mechanisms of Damage |
Author(s) |
Abdelali Oudriss, Xavier Feaugas |
On-Site Speaker (Planned) |
Abdelali Oudriss |
Abstract Scope |
Hydrogen diffusion and trapping mechanisms have been revisited in martensitic steels with a large variability of microstructural parameters. An accurate electrochemical permeation set-up associated with thermal desorption spectroscopy and elastic theoretical calculations was used to find a relationship between physical parameters associated with diffusion, trapping and microstructure. The different sites of hydrogen and associated energy were identified and discussed in relation with microstructural features. Using FEM calculations and a new design of permeation testing under tensile loading until fracture we revisit the question of hydrogen embrittlement of martensitic steel. More precisely, we explore the impact of mobile and trapped hydrogen on ductile and brittle fracture of martensitic steel using a local approach of fracture and a specific analysis of the defect evolution under hydrogen flux (vacancies and dislocations). We discussed damage conditions in relation with the mechanical state using tensile samples with different notch for two conditions. |
Proceedings Inclusion? |
Planned: |
Keywords |
Environmental Effects, Mechanical Properties, Modeling and Simulation |