Abstract
A thin specimen push-out technique for measuring interfacial shear debonding and sliding strength in fiber-reinforced metal matrix composites has been developed. An experimental set-up for measuring load-displacement relation of the fiber during pushing down the fiber axis was developed. An analytical form to obtain interfacial shear strengths based on shear-lag analysis using the load-displacement relation, which was obtained by push-out experiment, was also developed. The developed equipment and analytical procedure have been applied for the measurement of interfacial shear strengths in a SiC(CVD) fiber-reinforced Ti-15Mo-5Zr-3Al matrix composite. The fiber axial load-displacement relation during pushing down of the composite sample was successfully obtained and the interfacial shear strengths were calculated using this relation and the developed analytical form. The determined interfacial shear debonding and shear sliding strength of the composite were approximately 97 and 114 MPa, respectively. These values were considerably smaller than the shear yield stress of the Ti alloy matrix. Some comments are made on the comparison with the previously reported experimental procedure.
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