Internal structural characterization. Final report, September 1988-March 1992

Technical Report · Sat Aug 01 04:00:00 EDT 1992

OSTI ID:6350405

Klaassen, R; Bashyam, M

The nondestructive evaluation (NDE) techniques most appropriate for the detection of a variety of defects in metal- and ceramic matrix composites (MMC and CMC's) are described. NDE techniques which were investigated for application to these materials include acoustic microscopy, ultrasonic pulse-echo, ultrasonic through-transmission, ultrasonic velocity, ultrasonic backscatter, ultrasonic surface wave velocity, ultrasonic surface wave attenuation, film radiography, microtomographic radiography, and dual-energy microtomographic radiography. Types of defects for which optimized techniques are summarized include delaminations, broken fibers, fiber spacing, fiber orientation, fiber/matrix interface, matrix cracks and voids/porosity. Further NDE development is needed for these materials in the areas of basic development for other NDE modalities, advanced development for nondestructive material characterization, and the scale-up of proven NDE techniques for full scale components, to accommodate cost and geometry limitations.

• Research Organization: General Electric Co., Cincinnati, OH (United States). Aircraft Engine Technical Div.
• OSTI ID: 6350405
• Report Number(s): AD-A-264762/6/XAB
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360602* -- Other Materials-- Structure & Phase Studies
ACOUSTIC MICROSCOPY
ACOUSTIC TESTING
CERAMICS
COMPOSITE MATERIALS
CRACKS
DEFECTS
DETECTION
DIAGNOSTIC TECHNIQUES
ELEMENTS
FIBERS
INDUSTRIAL RADIOGRAPHY
INTERFACES
MATERIALS
MATERIALS TESTING
MEASURING METHODS
METALS
MICROSCOPY
NONDESTRUCTIVE TESTING
POROSITY
TESTING
TOMOGRAPHY
ULTRASONIC TESTING
VOIDS