Thermo-mechanical fatigue behavior of a single crystal nickel-based superalloy

► The thermo-mechanical fatigue life of OP TMF is shorter than that of IP TMF. This is mainly attributed to the maximum tensile stress level at the minimum temperature. ► Under out-of-phase condition, damage is controlled by oxidation. While under in-phase condition, damage is controlled by creep. ► In terms of the fracture surface and microstructural evolution under different conditions, deformation and damage mechanisms are explained based on the relative contribution of oxidation, creep and fatigue.