Mechanical properties of several magnesium and aluminum composites. Final report
Several composites of magnesium and aluminum alloys were tested in order to assess and evaluate their mechanical properties. The magnesium alloys were AZ91 C, ZE41 A, and commercially pure magnesium, reinforced with 40% by volume continuous graphite fiber. The tensile properties of these composites were not superior to those of unreinforced magnesium and estimates of their fracture toughness were low. The matrices of the aluminum composites were 2124-T6, 6061-T4, 2124-T4, and 2219-T4. The reinforcements were either particulate or whiskers of silicon carbide or boron carbide and their volume content was 15% to 30%. The aluminum composites which were reinforced with silicon carbide particulate exhibited improved yield and ultimate tensile stresses, as well as tensile elastic modulus over the unreinforced aluminum alloys. The 2124-T4/B4C/25p composite exhibited the highest ultimate tensile strength which was 511 MPa. The composite which was reinforced with whiskers of silicon carbide exhibited an endurance limit which was 20% higher than that of the matrix alloy. The compressive properties and fracture toughness of some of these aluminum composites were not improved over those of the unreinforced matrix alloy.... Composites, Mechanical properties.
- Research Organization:
- Army Research Lab., Watertown, MA (United States)
- OSTI ID:
- 6540425
- Report Number(s):
- AD-A-262481/5/XAB; ARL-TR--34
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
360603* -- Materials-- Properties
ALLOYS
ALUMINIUM ALLOYS
ALUMINIUM BASE ALLOYS
BORON CARBIDES
BORON COMPOUNDS
CARBIDES
CARBON COMPOUNDS
CARBON FIBERS
COMPOSITE MATERIALS
COMPRESSIBILITY
CRYSTALS
FIBERS
FRACTURE PROPERTIES
MAGNESIUM ALLOY-EZ
MAGNESIUM ALLOYS
MAGNESIUM BASE ALLOYS
MATERIALS
MECHANICAL PROPERTIES
MONOCRYSTALS
PARTICLES
PARTICULATES
RARE EARTH ALLOYS
REINFORCED MATERIALS
SILICON CARBIDES
SILICON COMPOUNDS
TENSILE PROPERTIES
WHISKERS
ZINC ALLOYS
ZIRCONIUM ADDITIONS
ZIRCONIUM ALLOYS