Investigation and synthesis of high temperature and increased-stiffness rsp aluminum alloys. Annual Technical report, 1 October 1985-30 September 1986
The objective of this research is to investigate two promising systems as the basis for high-temperature aluminum alloys useful to 425 C (800 F). The first is a metal-matrix composite consisting of an aluminum-magnesium alloy matrix reinforced by spinel (magnesium aluminate) particulate. The second system is tri-aluminum (zirconium, vanagium) dispersed in aluminum matrix. Here the lattice parameter matches that of the matrix. Research on dilute alloys has showed a low coarsening rate for this intermetallic at 425 C. Study of more-concentrated alloys with the necessary volume percent of dispersid for high-temperature creep and fatigue resistance is underway. A procedure for preparing specimens of the aluminum alloy matrix-spinel composite was worked out and specimens prepared. In the procedure, rapidly solidified alloy powder and oxide are mechanically alloyed, cold pressed, hot pressed, pressure forged, and annealed. Extrusions containing 5 vol.% tri-aluminum (0.75 vanadium, 0.25 zirconium) were prepared for this research by Lockhead-Palo Alto from rapidly solidified foil. The measured creep rate at 425 C is much lower than in the current aluminum-iron-cerium alloy.
- Research Organization:
- Northwestern Univ., Evanston, IL (USA). Technological Inst.
- OSTI ID:
- 6986474
- Report Number(s):
- AD-A-174598/3/XAB
- Country of Publication:
- United States
- Language:
- English
Similar Records
Investigation and synthesis of high-temperature and increased-stiffness RSP aluminum alloys. Final technical report, 1 October 1985-30 September 1988
Synthesis and properties of elevated temperature p/m aluminum alloys. Final report, 1 October 1981-30 September 1985
Related Subjects
360103* -- Metals & Alloys-- Mechanical Properties
360603 -- Materials-- Properties
ALKALINE EARTH METAL COMPOUNDS
ALLOYS
ALUMINATES
ALUMINIUM ALLOYS
ALUMINIUM COMPOUNDS
ALUMINIUM OXIDES
CERIUM
CHALCOGENIDES
COMPOSITE MATERIALS
CREEP
DILUTION
DISPERSIONS
ELEMENTS
EXTRUSION
FABRICATION
HIGH TEMPERATURE
IRON ALLOYS
MAGNESIUM ALLOYS
MAGNESIUM COMPOUNDS
MAGNESIUM OXIDES
MATERIALS
MATERIALS WORKING
MATRIX MATERIALS
MECHANICAL PROPERTIES
METALS
MINERALS
OXIDE MINERALS
OXIDES
OXYGEN COMPOUNDS
PHASE TRANSFORMATIONS
RARE EARTHS
SOLIDIFICATION
SPINELS
SYNTHESIS
VANADIUM ALLOYS
ZIRCONIUM ALLOYS