Title

Fiber damage mechanisms in titanium metal matrix composites

Document Type

Conference Proceeding

Date of Original Version

12-1-1996

Abstract

The fatigue damage mechanisms of SiC fibers were examined to interpret the observed variations in composite strengths tested at different temperatures. A series of monotonic tension, residual fatigue strength and fatigue-life tests were conducted on SCS-6 fibers at 500 and 650 °C. The surface of the fatigued fibers were examined by scanning electron microscopy for damage features such as the distribution of cracks and the spalling of the carbon-rich coating. Both the static and fatigue strength of SiC SCS-6 fibers were unaffected by the test temperature of 650 °C and below. The mean strength of the fiber was found to be 3.05 GPa with one standard deviation of 0.6 GPa.

Publication Title

American Society of Mechanical Engineers, Materials Division (Publication) MD

Volume

74

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