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), Vol. 26:11; ISSN 0021-9983
- Country of Publication:
- United States
- Language:
- English
Similar Records
The aging response and creep of DRA composites
Aluminum Metal Matrix Composites
Related Subjects
ALUMINIUM ALLOYS
MECHANICAL PROPERTIES
ALUMINIUM OXIDES
CARBON FIBERS
SILICON CARBIDES
AGING
COMPOSITE MATERIALS
CREEP
GRAPHITE
MICROHARDNESS
PERFORMANCE
TEMPERATURE EFFECTS
TENSILE PROPERTIES
WHISKERS
ALLOYS
ALUMINIUM COMPOUNDS
CARBIDES
CARBON
CARBON COMPOUNDS
CHALCOGENIDES
CRYSTALS
ELEMENTAL MINERALS
ELEMENTS
FIBERS
HARDNESS
MATERIALS
MINERALS
MONOCRYSTALS
NONMETALS
OXIDES
OXYGEN COMPOUNDS
SILICON COMPOUNDS
360603* - Materials- Properties