Structural levels of plastic deformation and fracture of coated materials under different schemes of external loading

The paper reports on results of experimental investigations of mesoscale plastic deformation development in coated and surface-hardened materials. Plastic flow evolution under different schemes of loading is considered from structural levels of plastic deformation and failure point of view. It is shown that coating-substrate interface under loading is the site of powerful stress concentrators emergence whose action results in formation of localized deformation bands, cracks and, finally, material failure