  We use a new variant of Molecular Static method for simulation of the atomic
structure near nanovoids. In our model an iterative procedure is employed, in
which the atomic structure in the void vicinity and the parameter determining
the displacement of atoms embedded into an elastic continuum are obtained in a
self-consistent manner. Results show that the atom displacements near nanovoids
are significantly different for varies crystallographic directions in bcc
metals. Not long ago we have obtained an equation of vacancy diffusion under
strain. Now we use this equation and the atom displacements near nanovoids to
evaluate shift of the void surface for varies crystallographic directions. We
find the equation for the normal component of the vacancy flux to the surface
of the sphere for some crystallographic directions and then calculate shifting
rate of the void surface element in mentioned directions for the different
supersaturations of the vacancies as a function of temperature.
