Investigation of fatigue damage mechanisms in SCS-6/Ti-15-3 metal matrix composite at elevated temperature
Abstract
A study was conducted to study the fatigue behavior of cross-ply, (0/90)2s, laminate of silicon fiber reinforced titanium matrix composite, SCS-6/Ti-15-3 at an elevated temperature of 427 C. Two sets of tests, at frequencies 0.02 and 2 Hz, were run at different stress levels which were either below or above the static first ply failure strength of laminate. Crack initiation locations and growth patterns were dependent on to specific test conditions of frequency and stress level. Also, microscopic analysis of the fatigued specimens revealed matrix failure mechanisms ranging from ductile failure to cleavage fracture. The results of this study clearly showed that temperature, frequency as well as stress levels are important design considerations for this composite in fatigue loading applications.
- Publication:
-
Mechanics of Composites at Elevated and Cryogenic Temperatures
- Pub Date:
- 1991
- Bibcode:
- 1991mcec.conf..239M
- Keywords:
-
- Damage Assessment;
- Fatigue Life;
- Fiber Composites;
- Metal Matrix Composites;
- Thermal Fatigue;
- Titanium Alloys;
- Failure Analysis;
- Fatigue Tests;
- Structural Mechanics