Coupled diffusion-mechanics framework for simulating hydrogen assisted deformation and failure behavior of metals - Archive ouverte HAL Accéder directement au contenu
Article Dans Une Revue International Journal of Plasticity Année : 2022

Coupled diffusion-mechanics framework for simulating hydrogen assisted deformation and failure behavior of metals

Résumé

Understanding of years-old multifaceted hydrogen-assisted damage evolution necessitates efforts to model the coupled diffusion-mechanics response in metallic materials. Informed by the dislocation-hydrogen interactions, understood earlier via experiments and/or multi-scale modeling techniques, this work presents a dislocation density-based crystal plasticity model coupled with a hydrogen diffusion/trapping model to simulate the hydrogen-assisted deformation and failure under the HELP mechanism of hydrogen embrittlement. The important role of hydrogen on dislocation multiplication, annihilation and dislocation interaction weakening are included in the presented framework. Two possible scenarios under HELP mechanism, leading to H-induced macroscopic softening or hardening as a result of trade-off between the hydrogen-induced weakening of dislocation interactions and hydrogen-induced increased dislocation density emerges from the simulation studies. These finding points towards the inevitable role of HELP mechanism to cause early failure in metals either working independently or in support with additional mechanisms.
Fichier non déposé

Dates et versions

hal-03752814 , version 1 (17-08-2022)

Identifiants

Citer

Vishal Singh, Rakesh Kumar, Yann Charles, Dhiraj Mahajan. Coupled diffusion-mechanics framework for simulating hydrogen assisted deformation and failure behavior of metals. International Journal of Plasticity, 2022, 157, pp.103392. ⟨10.1016/j.ijplas.2022.103392⟩. ⟨hal-03752814⟩
22 Consultations
0 Téléchargements

Altmetric

Partager

Gmail Facebook X LinkedIn More