Processing and failure studies of advanced composites using x-ray tomographic microscopy (XTM)

Conference · Fri Feb 01 00:00:00 EST 1991

OSTI ID:5578712

Kinney, J H; Saroyan, R A; Celeste, J ^[1]; Nichols, M C ^[2]; Stock, S R; Breunig, T M; Guviniler, A ^[3]

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1. Lawrence Livermore National Lab., CA (United States)
2. Sandia National Labs., Albuquerque, NM (United States)
3. Georgia Inst. of Tech., Atlanta, GA (United States)

The traditional role of Non-Destructive Testing (NDT) has been to identify critical flaws in components after they have been fabricated. Recently, efforts have been made to introduce NDT techniques earlier in the engineering cycle, and some progress has been made in applying NDT inspection during component processing. Improvements that have been made in the spatial resolution and sensitivity of x-ray computed tomography (CT), however, indicate that it is now possible to introduce NDT concepts and methods to the earliest stage of component manufacture, namely, in the development of new materials -- where the characterization and analysis of microscopic features are important. X-ray tomographic microscopy (XTM) is a high resolution, three-dimensional variant of CT with a spatial resolution better than 0.005 mm. These studies have demonstrated that XTM is a powerful NDT technique which is capable of imaging microstructural features in even the most complicated advanced composite materials. Work is in progress to use XTM for dynamic studies of chemical vapor infiltration in continuous fiber ceramic composites. Furthermore, an in-situ tensile load frame is now being used in conjunction with XTM to study fatigue crack growth and tensile failure in metal matrix composites. The application of NDT imaging methods to materials studies will greatly enhance our understanding of time-dependent behavior in complex engineering materials. 3 refs.

• Research Organization: Lawrence Livermore National Lab., CA (United States)
• Sponsoring Organization: USDOE; USDOE, Washington, DC (United States)
• DOE Contract Number: W-7405-ENG-48
• OSTI ID: 5578712
• Report Number(s): UCRL-JC-105329; CONF-910399-6; ON: DE92011463
• Resource Relation: Conference: American Society for Nondestructive Testing spring conference, Oakland, CA (United States), 18-22 Mar 1991
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
46 INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND TECHNOLOGY
COMPOSITE MATERIALS
PHOTON COMPUTED TOMOGRAPHY
ALUMINIUM ALLOYS
DEFECTS
FAILURES
INSPECTION
MATRIX MATERIALS
NONDESTRUCTIVE TESTING
SILICON CARBIDES
SPATIAL RESOLUTION
TITANIUM BASE ALLOYS
VANADIUM ALLOYS
X-RAY RADIOGRAPHY
ALLOYS
CARBIDES
CARBON COMPOUNDS
COMPUTERIZED TOMOGRAPHY
DIAGNOSTIC TECHNIQUES
INDUSTRIAL RADIOGRAPHY
MATERIALS
MATERIALS TESTING
RESOLUTION
SILICON COMPOUNDS
TESTING
TITANIUM ALLOYS
TOMOGRAPHY
360103* - Metals & Alloys- Mechanical Properties
440101 - Radiation Instrumentation- General Detectors or Monitors & Radiometric Instruments