Accession Number:

AD0775334

Title:

The Fatigue and Impact Resistance of Dual-Matrix Boron-Aluminum Composites.

Descriptive Note:

Final rept.,

Corporate Author:

MIDWEST RESEARCH INST KANSAS CITY MO

Personal Author(s):

Report Date:

1974-02-01

Pagination or Media Count:

14.0

Abstract:

The effects of a soft, plastic interface zone and of heat treatments on the axial fatigue resistance and on the Charpy impact behavior 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 matrix crack-tip stresses are relatively unimportant in determining the axial fatigue resistance of boron-aluminum composites, b a soft, plastic interface zone will only be effective in improving fatigue resistance in composites with a high-strength metal matrix having poor toughness, and c phase-boundary migration into boron filaments may occur during boron-aluminum interdiffusion instead of inert-marker movement into the aluminum matrix. Author

Subject Categories:

  • Laminates and Composite Materials

Distribution Statement:

APPROVED FOR PUBLIC RELEASE