Residual stress analysis in the oxide scale/metal substrate system due to oxidation growth strain and creep deformation

High-temperature oxidation ofmetals induces residual stresses both in the metals and in the growing oxide scales. In this work, considering the case of asymmetric oxidation, a new analysis model to elucidate the residual stress evolutions in an oxide scale/metal substrate system during an isothermal oxidation process is developed. Elastic and creep deformations in both oxide and metal phases are considered in this work. The oxidation growth strain generated in oxide scale is also taken into account and is described by the Clarkemodel, that is, the growth strain rate increases linearly with the oxide thickening rate during isothermal oxidation. A comprehensive numerical study is carried out by the present approach. Results reveal that the proposed model can lead to an excellent agreement with the published experimental results and thus well validate the present model. Effects of the growth parameter, creep constants, Young's modulus, and substrate thickness on the residual stress evolutions in the oxide scale/metal substrate system have also been discussed.