Abstract
Specimens used to date for testing titanium metal matrix composites (Ti MMCs) have severe limitations in the data obtained. In the present work, novel specimens have been developed to ensure that data obtained are indicative of the material as it appears in engineering components. For the longitudinal orientation, a modified dogbone with large shoulder radii is successful in improving the integrity of data. In the transverse orientation, selective reinforcement of monolithic Ti with MMC has allowed the production of a cruciform specimen in which the‘uprights’ are made of monolithic Ti and are gripped in the testing machine and the ‘cross’ is made of MMC and acts as a gauge length. The cruciform geometry ensures that surface defects, which blight conventional specimens, do not have such a deleterious effect. A unique specimen has been developed to enable the MMCs to be loaded in the through thickness direction, thus allowing a comparison of mechanical properties for the three geometric axes.
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