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We study the influence of the atomic structure in the vicinity of voids ontheir growth rate anisotropy. In the first part, we model the atomic structurein the vicinity of nanovoids in Fe and W using the advanced Molecular Staticsmethod. In the second part, we use the earlier obtained equations that takingthe influence of elastic fields into account to calculate the shifting rate ofthe void surface elements, and to evaluate the components of the strain tensorwe use the atomic structure modeling results from the first part. Thecalculations are performed for voids of several sizes at certainoversaturation's in a wide temperature range. The simulation results for thementioned metals with a bcc structure show that displacements of atoms locatedalong the crystallographic directions of the 100, 110, 111 types in thevicinity of the voids are significantly different, and this anisotropy of atomdisplacements leads to a reduction of spherical symmetry for the shifting rateof the surface elements. As the result, the initially spherical void shapebecomes faceted.

Modeling the atomic structure in the vicinity of the spherical voids and calculation of void growth rate anisotropy in bcc iron and tungsten