About this Abstract |
Meeting |
2022 TMS Annual Meeting & Exhibition
|
Symposium
|
Deformation and Damage Mechanisms of High Temperature Alloys
|
Presentation Title |
Coupled Diffusional-mechanical Modeling of Hydrogen Embrittlement in Polycrystalline Materials |
Author(s) |
Sofia Yassir |
On-Site Speaker (Planned) |
Sofia Yassir |
Abstract Scope |
This study will carry a numerical approach of a coupled temperature-displacement procedure in ABAQUS to model the coupling of the Hydrogen-Enhanced-Localized-Plasticity mechanism (HELP) with hydrogen transport in polycrystalline materials. Hydrogen embrittlement (HE) is a complex scientific topic that has been subjected to different studies due to diverse hypotheses behind the strength degradation in metals due to hydrogen. The role of plasticity in hydrogen embrittlement has been one of the primary debates between camps since the late 1980s. Unlike other mechanisms that suggest or study the hydrogen adsorbed at the crack tip, this mechanism studies the hydrogen ahead of the crack tip which has been shown to be responsible for the highly localized plasticity. Hydrogen accumulation in the vicinity of the crack tip leads to a brittle fracture due to dislocation motion increase in that region. |
Proceedings Inclusion? |
Planned: |
Keywords |
Other, Other, Other |