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Residual strain gradient determination in metal matrix composites by synchrotron X-ray energy dispersive diffractionAn X-ray technique for the measurement of internal residual strain gradients near the continuous reinforcements of metal matrix composites has been investigated. The technique utilizes high intensity white X-ray radiation from a synchrotron radiation source to obtain energy spectra from small (0.001 cu mm) volumes deep within composite samples. The viability of the technique was tested using a model system with 800 micron Al203 fibers and a commercial purity titanium matrix. Good agreement was observed between the measured residual radial and hoop strain gradients and those estimated from a simple elastic concentric cylinders model. The technique was then used to assess the strains near (SCS-6) silicon carbide fibers in a Ti-14Al-21Nb matrix after consolidation processing. Reasonable agreement between measured and calculated strains was seen provided the probe volume was located 50 microns or more from the fiber/matrix interface.
Document ID
19930055583
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
Authors
Kuntz, Todd A.
(Aptech Engineering Services, Inc. Sunnyvale, CA, United States)
Wadley, Haydn N. G.
(Virginia Univ. Charlottesville, United States)
Black, David R.
(NIST Gaithersburg, MD, United States)
Date Acquired
August 16, 2013
Publication Date
May 1, 1993
Publication Information
Publication: Metallurgical Transactions A - Physical Metallurgy and Materials Science
Volume: 24A
Issue: 5
ISSN: 0360-2133
Subject Category
Composite Materials
Accession Number
93A39580
Funding Number(s)
CONTRACT_GRANT: NAS3-25790
Distribution Limits
Public
Copyright
Other

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