Creep-driven nitride scale growth in γ-TiAl

The interaction between creep deformation and the scale growth process has been studied by performing nitridation experiments on TiAl under four-point bending. It was observed that a modest applied load can influence the nitride scale growth rate significantly through the generation of large stresses induced by creep rate mismatch between the scale and the underlying metal. On the other hand, a thin nitride scale is shown to slow the creep …