E.V. Logutenkova – Senior Lecturer, 

Kaluga branch Bauman MSTU

E-mail: iwtbhn@mail.ru

Substrates are characterized by microgeometric parameters and physicomechanical properties. They are formed by production operations, accompanied by external mechanical action.

With external action, microdeformation of the surface layer takes place, local compression and distortion of the crystal lattice, local detachments of the parts of the lattice and individual atoms by friction forces, a change in the surface microgeometry, which leads to a change in the physico-mechanical properties of the boundary layer of the structural material. In the conducted study, the external effect was performed by a line mechanical microdeformation of the surface layer of the structural material.

The surface energy was measured indirectly by estimating the contact potential difference using the static (non-abrasive) capacitor method, and the microgeometry parameters of the surface layer using the profilograph-profilometer ABRIS-PM7. In the study of the interrelation between the microgeometry parameters of the surface after the line microdeformation with the surface energy level, the effect on the surface of samples from steel 20, steel 45, steel 12X13 was simulated.

The correspondence of the largest and smallest levels of surface energy to the microgeometric parameters of the substrate has been established. As a result of the performed analysis of the microgeometry changes of surfaces under external mechanical action by the line microdeformation, it can be concluded that the greatest manifestation of the destruction zones caused by the distortion of the crystal lattices occurs in the substrate of products of rigid structures. This corresponds to the largest values of the surface energy.

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