Mechanical properties of some silicon carbide reinforced aluminum composites
The mechanical properties of several particulate and continuous fiber silicon carbide-reinforced aluminum composites were examined. The tensile strength of a 47 percent silicon carbide fiber unidirectionally-reinforced aluminum composite was 1273 and 76 MPa parallel and normal to the fiber direction, respectively. The tensile strength of (0 deg/90 deg) 4s and (0/sub 2/90/0)s composites were 629 and 864 MPa, respectively. The tensile properties of a 30 percent silicon carbide particulate reinforced aluminum were found to depend on the chemistry of the metal matrix. The endurance limits of the fiber and the particulate reinforced aluminum were at the most 55 percent and 33 percent of the respective tensile strengths. The fracture toughness of the fiber reinforced composite varied with specimen width, while that of the particulate reinforced composite was 21-29 MPa sq rt m. The fatigue crack growth rate in the latter composite decreased with material thickness. There were indications that the fatigue crack growth rate in the silicon carbide particulate reinforced aluminum may be independent of variations in the chemistry of the metal matrix. 6 references.
- Research Organization:
- Materials Technology Lab., Watertown, MA
- OSTI ID:
- 5978136
- Journal Information:
- J. Compos. Mater.; (United States), Journal Name: J. Compos. Mater.; (United States) Vol. 21; ISSN JCOMB
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
360203* -- Ceramics
Cermets
& Refractories-- Mechanical Properties
ALLOYS
ALUMINIUM ALLOYS
CARBIDES
CARBON COMPOUNDS
CRACK PROPAGATION
FIBERS
FRACTURE PROPERTIES
MATERIALS
MECHANICAL PROPERTIES
PARTICLES
PARTICULATES
REINFORCED MATERIALS
SILICON CARBIDES
SILICON COMPOUNDS
TENSILE PROPERTIES