Fatigue behavior and life prediction of a SiC/Ti-24Al-11Nb composite under isothermal conditions
Metal Matrix Composites (MMC) and Intermetallic Matrix Composites (IMC) are potential material candidates for advanced aerospace application. As part of this study, a series of strain- and load-controlled fatigue tests were conducted on unidirectional SiC/Ti-24Al-11Nb (atomic%) composite at 425 and 815[degree]C. Several damage mechanism regimes were identified by using a strain-based representation of the data. Results from these tests were then used to address issues of test control modes, definition of failure, and testing techniques. Factors such as fiber volume ratio, number of plys, and temperature dependence are implicitly incorporated into a model. The model parameters were determined by using fatigue data at temperatures of 425 and 815[degree]C. Fatigue-life data from two independent sources were used to verify the model at temperatures of 650 and 760[degree]C. Cross-ply life data from specimens with ply lay-ups of [0/90][sub 2s] and [0/[plus minus]45/90][sub 2s] at 760[degree]C were also predicted. Correlation between experimental and predicted livers was found to be vary reasonable.
- Research Organization:
- Case Western Reserve Univ., Cleveland, OH (United States)
- OSTI ID:
- 7017968
- Country of Publication:
- United States
- Language:
- English
Similar Records
High temperature fatigue behavior of a SiC/Ti-24Al-11Nb composite
Fatigue life prediction of an intermetallic matric composite at elevated temperatures
Related Subjects
360603* -- Materials-- Properties
ALLOYS
ALUMINIUM ALLOYS
CARBIDES
CARBON COMPOUNDS
COMPOSITE MATERIALS
FATIGUE
LIFETIME
MATERIALS
MATRIX MATERIALS
MECHANICAL PROPERTIES
NIOBIUM ALLOYS
SERVICE LIFE
SILICON CARBIDES
SILICON COMPOUNDS
TEMPERATURE RANGE
TEMPERATURE RANGE 0400-1000 K
THERMAL FATIGUE
TITANIUM ALLOYS
TITANIUM BASE ALLOYS