Inspection and repair process using thermal acoustic imaging

摘要

A method of repairing a metal component of a turbine engine includes removing (120, 130) the existing protective coating and cleaning (140) the surface. The surface is then inspected (150) for intergranular attack (IGA) and other damage by the nondestructive technique of thermal acoustic imaging (TAI). The surface containing IGA and other damage is repaired (160) and then recoated (180, 190) with the protective coating and returned (200) to service.