Exploratory Development of FMR (Ferromagnetic Resonance) Advanced Surface Flaw Detection Methods

摘要

The purpose of this program was to carry forward the development of a microwave eddy current (MEC) probe, which is based on the ferromagnetic resonance (FMR) principle, to the point where its performance in a practical flaw detection breadboard system for gas turbine engine component inspection and its compatibility with the Retirement-for-Cause (RFC) modular inspection system could be demonstrated. This program studied the physical constraints related to the inspection of complex geometries in Ti 6-2-4-6 and IN-100 materials with the MEC-FMR surface flaw detection method. Based on the resulting information, a breadboard inspection system was designed and fabricated to demonstrate the MEC-FMR test method in the inspection of a jet engine interstage seal key slot.