On the micromechanics of voids in nanotwinned materials

This work investigates internal damage by void growth in NT microstructures via crystal plasticity. The framework incorporates length-scale effects and explicitly models twin boundary migration. Using finite-deformation, plane strain finite element calculations of porous unit cells, we analyze the roles size, plastic anisotropy migration on evolution over a range controlled biaxial stress states. simulations provide insights into crystallographic aspects porosity microstructures. Emphasis is placed correlating micromechanics failure necking. Irrespective level anisotropy, effectively shields process, delaying compared to non-twinned It found that causes kink band instability can affect growth. Coupled with mobility, size create rich landscape characteristics as function state.