[SY-E14] A brittle to ductile transition modeling for liquid metal embrittlement
Liquid metal embrittlement is a surface adsorption induced fracture phenomenon that is currently not easily amenable to modeling. A strategy framed in terms of a competition between dislocation emission and Griffith fracture at the crack tip will be presented within the standard brittle to ductile transition realm. The goal is to be able to qualitatively predict the sensitivity to LME by coupling atomic scale modeling with a semi-continuous approach. The brittle to ductile transition description of an elastically loaded crack tip has been adapted to LME that relies on solid-liquid surface energy modeling at the atomic scale by AbInitio molecular dynamics and generalized stacking faults modeled at the atomic scale within the Peirls-Nabarro framework. We will present preliminary results on a model system for LME and a comparison with experimental results in terms of sensitivity.