Abstract
A brief summary of analytical models is given for estimating effective elastic moduli of discontinously reinforced metal-matrix composites (DMMCs) with damaged particles (either complete voids as shattered particles, or debonded particles, or penny-shaped cracks). The analytical results are then compared with elastic moduli determined from non-destructive ultrasonic wave-speed measurements of SiC-particle-reinforced titanium-matrix composites produced by shock-wave consolidation. For the shock-consilidated TiSiC metal-matrix composite compacts, the overall particle damage mode is found to be similar to debonded particles and the effective volume fraction of damaged particles is determined to be 0·39 on the basis of the data for both Young's and bulk moduli. Ultrasonic wave-speed measurements combined with analytical and/or numerical results on overall elastic properties (Young's, bulk and shear moduli, and Poisson's ratio) could be a useful tool in assessing the damage of particles in DMMCs.
Published Version
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