Abstract
The purpose of this study is to demonstrate that the measurement of elastic constants, especially the longitudinal Young's modulus, by frequency measuring, can be used as a non-destructive method to evaluate the damage in a Ti-6A1-4V/SiC metal matrix composite. Therefore, the composite was thermally cycled between 200 and 700°C, which was found to induce a decrease in the longitudinal Young's modulus by 20%. By comparison with mechanically tested samples, this decrease is shown to correspond to a point where the failure stress drops dramatically. Thus, this non-destructive method has proved successful to follow and evaluate the damage evolution. It could be applied to concrete situations such as evaluating the damage in composite components.
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