Cylindrical void growth vs. grain fragmentation in FCC single crystals: CPFEM study for two types of loading conditions

The crystal plasticity finite element method (CPFEM) is used to investigate the coupling between cylindrical void growth or collapse and grain refinement in face-centered cubic (FCC) single crystals. A 2D plane strain model with one used. effect of initial lattice orientation, similarities, differences stress- strain-driven loading scenarios are explored. To this end, boundary conditions enforced two different ways. first based on maintaining constant in-plane stress biaxiality via a dedicated truss element, while second imposing displacement factor. Uniaxial biaxial cases studied. For uniaxial case special configuration, which enforces an equivalent pattern plastic deformation pristine crystal, selected order mutual interactions evolving developed rotation heterogeneity. Next, considered for three orientations, not symmetric respect directions. It analysed how biaxility factors orientation influence evolution terms its size shape. Moreover, consequences variations resulting heterogeneity studied context phenomenon accompanying evolution. Scenarios that may lead more advanced fragmentation identified.