Effect of a high temperature cycle on the mechanical properties of silicon carbide/titanium metal matrix compositesAn investigation is conducted of the effects of the SPF/DB cycle on continuous SiC fiber-reinforced Ti-15V-3Cr-3Al-3Sn composite's matrix, fiber, and matrix-fiber interface. The fibers in question, designated SCS-6, have a carbon core and thin, carbon-rich surface. The fatigue endurance limit at 50,000 cycles for the SPF/DB specimens was 50 percent lower than for the as-fabricated material. The substantial changes in tensile strength, fatigue life, and fracture-surface appearance due to the SPF-DB cycle are explained by a difference in the failure mechanisms due to SPF/DB-induced changes in the fiber/matrix interface strength.
Document ID
19900061057
Acquisition Source
Legacy CDMS
Document Type
Conference Paper
Authors
Naik, R. A. (Planning Research Corp. Hampton, VA, United States)
Johnson, W. S. (NASA Langley Research Center Hampton, VA, United States)
Pollock, W. D. (Virginia, University Charlottesville, United States)