A model for the effect of creep deformation and intrinsic growth stress on oxide/nitride scale growth rates with application to the nitridation of γ-TiAl

The growth rate of oxide and nitride scales can be considerably affected by the application of stress to the material when the underlying substrate is able to creep. This occurs even though the applied stress may be quite small. In this paper, we present a model to calculate the residual stress induced in growing scales during this process. It is shown that the applied stress causes the metallic substrate and the scale to creep at different …