Feasibility Demonstration of Holographic Nondestructive Inspection of Naval Aircraft Engine Components.
Final technical rept.,
TRW SYSTEMS GROUP REDONDO BEACH CA
Pagination or Media Count:
Report represents the results of a study to determine the feasibility of using Laser Holographic Interferometry to detect flaws in Navy gas turbine engine turbine blades. The experimental work employed a continuous wave laser because of its ease of operation in laboratory work. The double-exposure holographic technique was able to detect all existing flaws regardless of the degree of surface erosion. High pressure, first stage turbine blades from a TF41 engine were used for most of the study because they exhibit cracking on the airfoil surface which is particularly susceptible to holographic inspection. Cracks on the blade shroud were also detected demonstrating the sensitivity of the system. Author
- Test Facilities, Equipment and Methods
- Jet and Gas Turbine Engines