Multi-scale modeling of decohesion characteristics of second phase particles from the matrix in uniaxial tension in a high strength aluminum alloy

This research investigates stress evolution and plastic deformation characteristics influencing particle–matrix interface decohesion in AA7075-O aluminum sheets. Employing a combined molecular dynamics (MD) - finite element (FE) approach, three interfaces (Al-η, Al-θ, Al-Fe-rich intermetallic) are studied under various loading conditions. Cohesive properties, represented by traction-separation (T-S) curves, are derived using a novel methodology …