Elevated temperature strength, aging response and creep of aluminum matrix composites
- Pennsylvania State University, State College (United States)
The effect of reinforcement on the high-temperature performance of aluminum matrix composites was investigated using samples of 6061 aluminum alloy reinforced with planar-random graphite fibers, SiC whiskers, or alumina particles, which were aged at 150 and 200 C for up to 500 hrs. As indicated by the results of microhardness tests, all specimens exhibited accelerated aging response, with the response depending on the characteristics of the reinforcement. Both the graphite-fiber- and SiC-whisker-reinforced composites showed a substantially increased strengths over that of the wrought 6061 Al at all temperatures. The graphite-fiber- and the SiC-whisker-reinforced composites were found to retain their tensile strength and stiffness in the overaged condition of the matrix. The whisker-reinforced composite showed significant resistance to creep at temperatures between 232 and 350 C under stresses of up to 100 MPa, while the particulate composite had a moderate increase in creep resistance. 51 refs.
- OSTI ID:
- 6998819
- Journal Information:
- Journal of Composite Materials; (United States), Journal Name: Journal of Composite Materials; (United States) Vol. 26:11; ISSN JCOMBI; ISSN 0021-9983
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
360603* -- Materials-- Properties
AGING
ALLOYS
ALUMINIUM ALLOYS
ALUMINIUM COMPOUNDS
ALUMINIUM OXIDES
CARBIDES
CARBON
CARBON COMPOUNDS
CARBON FIBERS
CHALCOGENIDES
COMPOSITE MATERIALS
CREEP
CRYSTALS
ELEMENTAL MINERALS
ELEMENTS
FIBERS
GRAPHITE
HARDNESS
MATERIALS
MECHANICAL PROPERTIES
MICROHARDNESS
MINERALS
MONOCRYSTALS
NONMETALS
OXIDES
OXYGEN COMPOUNDS
PERFORMANCE
SILICON CARBIDES
SILICON COMPOUNDS
TEMPERATURE EFFECTS
TENSILE PROPERTIES
WHISKERS