Formation of functional layers on titanium alloys under nonstattonary conditions

We formulate basic thermodynamic ideas concerning the relationship between the physicochemical processes and the accumulation of defects in materials. The accumulation of damage results in, generally speaking, nonstadonary conditions of interaction in the metal-medium system. To describe the kinetics of the processes of high-temperature interaction of binary alloys with gaseous media, we formulate the corresponding initial-boundary-value diffusion problem and obtain analytic expressions for the distributions of impurity and alloying elements, for the thickness of the newly formed phase, and the increment of mass. We also perform the verification of the proposed approach. The numerical solutions adequately reflect the observed tendencies in the behavior of the parameters of corrosion of OT4 alloy in oxygencontaining media under the conditions of thermal cycling and static loading.