In the paper we investigate mesoscopic levels of plastic deformation of surface layers of lead polycrystals, its alloys with partially soluble elements, aluminum, and titanium under alternating bending. New mechanisms of plastic flow are revealed at the mesolevel, namely, material separation into lamella and their mutual displacement in constrained deformation zones (for lead and its alloys), self-consistent corrugation of the surface layer in the hierarchy of mesoscale levels of deformation (for aluminum), anomalously large vertical displacements of mesoblocks of the surface layer with the formation of the two-level cellular structure (for titanium with a hydrogenated surface layer). On the basis of the multilevel approach we conclude that mesoscopic deformation mechanisms of surface layers of solids under alternating bending are determined by the self-consistency of rotation deformation modes in surface layers and 'checkboard' pattern of normal and tangential stresses at the 'surface layer - substrate' interface.
|Number of pages||14|
|Publication status||Published - 2005|
ASJC Scopus subject areas
- Nuclear and High Energy Physics
- Atomic and Molecular Physics, and Optics