Accession Number:

AD0919173

Title:

Feasibility Demonstration of Holographic Nondestructive Inspection of Naval Aircraft Engine Components.

Descriptive Note:

Final technical rept.,

Corporate Author:

TRW SYSTEMS GROUP REDONDO BEACH CA

Personal Author(s):

• Jacoby, Jerold L.
• Wright, James E.

Report Date:

1974-03-27

Pagination or Media Count:

39.0

Abstract:

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

Descriptors:

• *NONDESTRUCTIVE TESTING)
• (*TURBOFAN ENGINES
• ENGINE COMPONENTS)
• (*ENGINE COMPONENTS
• NONDESTRUCTIVE TESTING)
• (*GAS TURBINE BLADES
• DEFECTS(MATERIALS))
• (*HOLOGRAPHY
• INTERFEROMETERS
• INSPECTION
• CONTINUOUS WAVES
• REAL TIME
• CRACKS
• LEADING EDGES
• PULSES
• LASERS
• NAVAL EQUIPMENT

Subject Categories:

• Test Facilities, Equipment and Methods
• Jet and Gas Turbine Engines

Distribution Statement:

APPROVED FOR PUBLIC RELEASE