Concomitant oxidation-diffusion-creep processes for stress generation and suppression of oxide-alloy interfacial instabilities

Metallic materials under extreme thermo-mechanical-environmental service conditions oftentimes rely on the formation of dense and protective oxide layers, e.g., typically alumina or chromia. Their failures, however, usually emerge from morphological instability such layers at oxide-alloy interface. This work suggests that a tensile, biaxial stress arises in substrate alloy due to concomitant oxidation-diffusion-creep processes, which, contrast growth layer, provides stabilizing factor suppresses rumpling compositional variation chromia interlayers. For analysis, tensile compensates layer. The is modeled by stress-domain which prefers high-growth-stress phase expense low-growth-stress one. Our findings have been successfully employed rationalize recent experiments superalloys cyclic oxidation carburized irradiated stainless steels isothermal conditions.