Atomistic simulation of the mechanical response of a nanoporous

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Uniaxial strain compression of a Ta monocrystal containing randomly placed nanovoids was studied using molecular dynamics
simulations. Interacting voids decrease the stress required for the onset of plasticity, in comparison with earlier studies for isolated
voids. Dislocations resulting from loading are emitted from void surfaces as shear loops, with their interactions leading to harden-
ing. Plastic activity leads to a decrease in porosity, with voids disappearing at 14% strain. The resulting dislocation densities agree
well with experimental results.

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