Abstract
Damage assessment method of gas turbine hot-gas-path components such as blade and nozzle was required to evaluate remaining life of these components; especially, the method of size estimation of inelastic deformation zone is important for structural integrity assessment. In this study, in order to provide the way for evaluating the plastic deformation zone analysis of gas turbine hot-gas-path components, X-ray diffraction experiments were performed for tensile deformed Ni-base single crystal superalloys using synchrotron radiation at SPring-8, and the relation between applied tensile strain and X-ray diffraction peak width was studied. X-ray diffraction peak width increased with the increase of applied tensile strain. Williamson-Hall analysis was applied to calculate microstrain. Microstrain showed drastic increase in the early stage of tensile tests. It suggests that the measurement of microstrain by X-ray diffraction is useful for size estimation of inelastic deformation zone.
