TY - GEN
T1 - Nondestructive X-ray tomographic microscopy of damage in various continuous-fiber metal matrix composites
AU - Stock, Stuart R.
AU - Breunig, Thomas M.
AU - Guvenilir, Abbas
AU - Kinney, John H.
AU - Nichols, Monte C.
PY - 1992
Y1 - 1992
N2 - X-ray tomographic microscopy (XTM), a high resolution variant of industrial computed tomography, provides nondestructive, high-resolution 'sectioning' of samples and allows three-dimensional mapping of X-ray absorptivity multiple times during an in-situ experiment on a single sample. The capabilities of XTM for damage accumulation studies in composites are described in this paper, with emphasis on what can be accomplished using monochromatic synchrotron radiation. Results are shown for five continuous-fiber metal matrix composites (MMC) (aligned SiC/Al, [02/±45]s SiC/Al, aligned SiC/Ti3Al, aligned SiC/Ti-6Al-4V, and aligned Al2O3/NiAl). The samples' cross-sectional dimensions are approximately 1.5 by 1.5 mm or smaller, and the variation of X-ray absorptivity is measured within each (5.6-μm)3 volume element of the volume studied. An experimental approach for nondestructively quantifying damage evolution with XTM is outlined, and preliminary results are presented for the aligned-fiber SiC/Al MMC. Also discussed are the prospects for improved spatial resolution with XTM and for examining specimens under applied loads and/or with dimensions larger than the current 2 or 3 mm.
AB - X-ray tomographic microscopy (XTM), a high resolution variant of industrial computed tomography, provides nondestructive, high-resolution 'sectioning' of samples and allows three-dimensional mapping of X-ray absorptivity multiple times during an in-situ experiment on a single sample. The capabilities of XTM for damage accumulation studies in composites are described in this paper, with emphasis on what can be accomplished using monochromatic synchrotron radiation. Results are shown for five continuous-fiber metal matrix composites (MMC) (aligned SiC/Al, [02/±45]s SiC/Al, aligned SiC/Ti3Al, aligned SiC/Ti-6Al-4V, and aligned Al2O3/NiAl). The samples' cross-sectional dimensions are approximately 1.5 by 1.5 mm or smaller, and the variation of X-ray absorptivity is measured within each (5.6-μm)3 volume element of the volume studied. An experimental approach for nondestructively quantifying damage evolution with XTM is outlined, and preliminary results are presented for the aligned-fiber SiC/Al MMC. Also discussed are the prospects for improved spatial resolution with XTM and for examining specimens under applied loads and/or with dimensions larger than the current 2 or 3 mm.
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M3 - Conference contribution
AN - SCOPUS:0027002361
SN - 0803114745
T3 - ASTM Special Technical Publication
SP - 25
EP - 34
BT - ASTM Special Technical Publication
PB - Publ by ASTM
T2 - International Symposium on Damage Detection and Quality Assurance in Composite Materials
Y2 - 13 November 1990 through 14 November 1990
ER -