The transverse creep deformation and failure characteristics of SCS-6/Ti-6AI-4V metal matrix composites at 482 °C

Damage Mechanisms in Unidirectional SiC/Ti Composites under Transverse Creep Loading: Experiments and Modeling

“…P is the Larson-Miller parameter, defined as P ¼ T(20 þ log t)10 À3 , where T is the absolute temperature and t the time in hours (in Figure 2, t is the time to failure). Data found in the literature for other composites and experimental conditions are also reported (Ohno et al, 1994;Eggleston and Ritter, 1995). This figure shows that the time to failure of the two SiC/Ti composites under investigation in this study is significantly greater than what is found in the literature.…”

“…In fact, the environment may have a significant influence on the results. This assumption is confirmed by Eggleston and Ritter (1995) through SEM observations of an air tested specimen. They noted cracks in the gauge section of the surface corresponding to embrittlement of the titanium matrix by oxygen absorption.…”

Multiscale analysis of the transverse properties of Ti-based matrix composites reinforced by SiC fibres: from the grain scale to the macroscopic scale

“…A number of scanning electron microscope (SEM) observations have shown that the only observed damage is interface debonding (Carrere, 2000). As shown in previous papers (Crossman et al, 1974;Ohno et al, 1994;Eggleston and Ritter, 1995), due to the existence of an experimentally determined critical stress ( c ), two distinct domains were evidenced as a function of the applied stress: below c , a slight damage (fibre/matrix debonding) is observed. After a short primary creep stage, a steady creep rate is attained leading to a long duration test without fracture, above this critical stress, damage is generalized, leading to an increase in the secondary creep rate and to the possible failure of the specimen.…”