ULTRASOUND AND X-RAY CHARACTERIZATION OF DAMAGE IN ALUMINA STRUCTURAL CERAMICS
- U.S. Army Research Laboratory, 4600 Deer Creek Loop, Aberdeen Proving Ground, MD 21005-5066 (United States)
A combination of destructive and nondestructive testing methods was utilized to evaluate the impact velocity and energy conditions that caused fracture in alumina structural ceramics. Incremental damage was produced in aluminum-backed Al{sub 2}O{sub 3} tiles using drop tower testing for low velocity impact with a high mass indenter. The majority of damage in the fractured samples consisted of radial and cone cracking. The samples were nondestructively evaluated using digital radiography, x-ray computed tomography, and ultrasound C-scan imaging. Bulk damage detected by these techniques was compared to surface damage observed by visual inspection. Qualitative evaluation of surface and bulk cracks and quantitative percent damage assessment were used to compare the integrity of the nondestructive techniques. While all three methods were able to detect surface cracks, C-scan imaging was more effective at detecting internal damage in the alumina samples and x-ray computed tomography was more effective at producing three-dimensional images of the crack patterns.
- OSTI ID:
- 21371005
- Journal Information:
- AIP Conference Proceedings, Vol. 1211, Issue 1; Conference: Review of progress in quantitative nondestructive evaluation, Kingston, RI (United States), 26-31 Jul 2009; Other Information: DOI: 10.1063/1.3362204; (c) 2010 American Institute of Physics; ISSN 0094-243X
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
ALUMINIUM
ALUMINIUM OXIDES
CERAMICS
COMPARATIVE EVALUATIONS
COMPUTERIZED TOMOGRAPHY
CRACKING
CRACKS
DAMAGE
FRACTURES
IMAGES
SURFACES
VELOCITY
X RADIATION
X-RAY RADIOGRAPHY
ALUMINIUM COMPOUNDS
CHALCOGENIDES
CHEMICAL REACTIONS
DECOMPOSITION
DIAGNOSTIC TECHNIQUES
ELECTROMAGNETIC RADIATION
ELEMENTS
EVALUATION
FAILURES
INDUSTRIAL RADIOGRAPHY
IONIZING RADIATIONS
MATERIALS TESTING
METALS
NONDESTRUCTIVE TESTING
OXIDES
OXYGEN COMPOUNDS
PYROLYSIS
RADIATIONS
TESTING
THERMOCHEMICAL PROCESSES
TOMOGRAPHY