Features of formation of residual stresses in surface layers and coatings

Using an original technique based on the features of elastic anisotropy of crystals, residual stresses in the surface layers of metal alloys after ion nitriding, in heat-protective coatings and coatings based on refractory metals, as well as in trip steels have been analyzed. It is shown that in multilayer (n = 120 layers) Nb / Mo magnetron coatings with a thickness of 800 μm, lower compressive residual stresses (less than 600 MPa) are formed than in monolayer Nb and Mo coatings with a thickness of 10 μm.