Abstract
Nondestructive evaluation (NDE) is a promising means of studying silicon carbide particulate (SiCp)-reinforced aluminum metal-matrix composite (MMC) products at various processing stages. Eddy current techniques are effective in characterizing alloy powders and in evaluating the percentage of reinforcement in Al/SiCp powder mixtures. Ultrasonic methods can be used to identify SiCp clusters in large-scale, powder metallurgy processed MMC billets, while eddy current techniques can detect near-surface density variations. Ultrasonic techniques can also be used to determine the anisotropic stiffness constants of composite extrusions; the measured moduli are in good agreement with those determined by tensile testing. These results suggest that NDE can be used to provide on-line, closed-loop control of MMC manufacturing.
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Liaw, P.K., Shannon, R.E., Clark, W.G. et al. Determining material properties of metal-matrix composites by NDE. JOM 44, 36–40 (1992). https://doi.org/10.1007/BF03223169
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DOI: https://doi.org/10.1007/BF03223169