INFLUENCE OF THE ADDITIVES OF THE THIRD ELEMENT IN ALLOY Cu-Ti ON ENERGY OF THE SEGREGATION OF THE IMPURITY DURING CELLULAR PRECIPITATION OF THE SOLID SOLUTION

The mathematical analysis of influence of additives of the third component (Cr, Mn, Fe, Co, Ni, Ga, Zr, In, Sn) on quantities of energies of a segregation of impurities in volume and on boundaries of grains of alloy Cu-4,35 at. % Ti is made during aging on the cellular mechanism. Calculation of enthalpies of a segregation is spent with the account of energies of interatomic and elastic interaction of atoms of a different grade. Effects of experimental researches testify, in particular, to effective accelerating influence Ni on development of cellular decay in alloy Cu-4,35 ат. % Ti and essential inhibiting action of the given process by an additive Co. On the basis of modelling calculations of enthalpies of mixture in volume and on boundaries of grains it is erected that for the specified additives distinctions in quantities of an enthalpy of mixture in volume of grains appear considerable. The carried out analysis can be taken as a principle build-ups of model of a dynamic segregation and its influence on velocity of cellular decay in threefold metal systems.