Possible mechanisms for the nucleation of primary fracture zones during deformation-induced phase transformations in solids: I. deformation-induced instability of crystal lattices
The problems related to the search for the nucleation mechanisms of primary continuity defects, which serve as the sources of submicrocracks in an initially continuous solid body, are discussed. A crystal lattice in a solid body is shown to become unstable to the retention of its long-range atomic order, because of a high level of the hydrostatic tensile load generated by stress concentrators. As a result, localized phase trans-formations of a solid phase into other states of aggregation can occur near the stress concentrators. An analysis of these phenomena can serve as the basis for searching for fracture-zone nucleation mechanisms.