Structural and phase changes in metals during formation of the fatigue fracture surface in metals and alloys

The mechanisms of deformation-induced structural and phase changes, which accompany crack nucleation and growth during fatigue fracture of metals and alloys, are considered. It is shown that the crack steady growth phase is determined by the processes of local melting of the material in extension phase, and melt crystallization processes with formation of shrinkage pores in front of the crack tip in the unloading phases and crack narrowing.