Damage and fracture mechanism of a nickel-based single crystal superalloy during creep at moderate temperature

By means of creep properties measurement, microstructure and fracture morphology observation, an investigation has been made into the damage and fracture mechanism of a nickel-based single crystal superalloy during creep at intermediate temperature. The results show that the deformation mechanism of the alloy is dislocations slipping in the γ matrix and shearing into γ′ phase, the dislocations shearing into γ′ phase may be decomposed to form the...