Improbability of Void Growth in Aluminum via Dislocation Nucleation under Typical Laboratory Conditions

LD Nguyen and DH Warner, PHYSICAL REVIEW LETTERS, 108, 035501 (2012).

DOI: 10.1103/PhysRevLett.108.035501

The rate at which dislocations nucleate from spherical voids subjected to shear loading is predicted from atomistic simulation. By employing the latest version of the finite temperature string method, a variational transition state theory approach can be utilized, enabling atomistic predictions at ordinary laboratory time scales, loads, and temperatures. The simulation results, in conjunction with a continuum model, show that the deformation and growth of voids in Al are not likely to occur via dislocation nucleation under typical loadings regardless of void size.

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