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X‐ray microtomographic studies of metal matrix composites using laboratory X‐ray sources
Author(s) -
MUMMERY P. M.,
DERBY B.,
ANDERSON P.,
DAVIS G. R.,
ELLIOTT J. C.
Publication year - 1995
Publication title -
journal of microscopy
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.569
H-Index - 111
eISSN - 1365-2818
pISSN - 0022-2720
DOI - 10.1111/j.1365-2818.1995.tb03570.x
Subject(s) - materials science , composite material , x ray , void (composites) , voxel , x ray microtomography , ultimate tensile strength , volume fraction , absorption (acoustics) , analyser , optics , physics , computer science , artificial intelligence
Summary X‐ray microtomography (XMT) is a non‐destructive technique that allows the internal structure of a material to be imaged by the spatial distribution of its linear X‐ray absorption coefficients. This paper demonstrates the use of XMT to investigate: (1) the distribution of TiB 2 reinforcement in composites formed by powder processing; (2) the local void volume fraction as a function of position in highly deformed regions of failed tensile specimens of SiC‐reinforced material allowing a valid damage parameter to be defined at high strains; (3) absorption coefficients measured at different energies simultaneously using a multichannel analyser which can sometimes be used to separate linear absorption changes due to (a) density variations and (b) compositional variations in individual voxels; and (4) the use of sequential sections to provide a three‐dimensional representation of the failed specimens.