Low cycle fatigue behavior of a high Co polycrystalline nickel-base superalloy at 750 °C

Low cycle fatigue (LCF) performance of a novel high Co nickel-base polycrystalline superalloy was investigated at 750 °C under the strain ranges from 0.6 to 1.0%. The objective is to focus on fatigue life, cyclic deformation behavior, deformation substructure, fracture mode, crack propagation pathway as well as oxidation attack at the crack tip. The fatigue life decreases with strain range increasing and follow the Coffin-Manson power law with...