SYMPOSIA PAPER Published: 01 January 1974
STP35506S

Effect of Filament-Matrix Interdiffusion on the Fatigue Resistance of Boron-Aluminum Composite

Source

The effects of diffusion across filament-matrix interfaces and of weak interfacial bonds on the axial fatigue resistance of boron-6061 aluminum composites were determined. Interfacial microstructures and composite fatigue resistance were compared with those previously determined for current, state-of-the-art boron-6061 aluminum composites. It was concluded that (a) the fracture behavior of the silicon carbide (SiC) coating on coated boron filaments preferentially degrades the low-cycle fatigue resistance of composites, (b) weak interfacial bonds extend the fatigue life of boron-6061 aluminum composites, (c) increased diffusion penetration across boron-6061 aluminum interfaces shortens composite fatigue life by a detectable but minimal amount, and (d) the fatigue resistance of current, state-of-the-art boron-6061 aluminum composites can be improved substantially

Author Information

Hancock, JR
Midwest Research Institute, Kansas City, Mo.
Shaw, GG
Midwest Research Institute, Kansas City, Mo.
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Details
Developed by Committee: D30
Pages: 497–506
DOI: 10.1520/STP35506S
ISBN-EB: 978-0-8031-4639-6
ISBN-13: 978-0-8031-0308-5