TECHNIQUE FOR STUDYING THE PROCESS OF COMMISSIONING MICROPROJECTIONS ON CONTACT SURFACES AND THE KINETICS OF CONTACT INTERACTION BETWEEN DISHENIFIC MATERIALS

A technique has been developed for studying contact interaction between dissimilar materials under thermal deformation effects over time. Kinetic curves of contact formation, plastic deformation of microprotrusions, height of microprotrusions, changes in contact stresses on microprotrusions, changes in mechanical properties on the surface and depth of the nearcontact volume of microprotrusions from room to premelting temperatures and a pressure range before and after threshold values were constructed. The nature of crushing and the kinetics of contact interaction between dissimilar materials with sharply different resistance to plastic deformation and the nature of the chemical bond under thermal deformation are considered. It is shown that plastic deformation of microprotrusions is responsible for the formation of contact and activation processes on contact surfaces, and that the level of stresses of the 2nd kind on the contact areas of microprotrusions significantly exceeds the nominal stress values included in the calculation formulas.