Research on high-strength aerospace aluminum alloys
- Alcoa Laboratories, Alcoa Center, PA (USA)
Alcoa is developing materials which have either lower density, higher strength, higher modulus of elasticity or greater durability and damage tolerance (DADT) than currently used alloys. A1-Li alloys match the properties of currently used alloys at 7 to 10% lower density. One wrought P/M 7XXX alloy has either 30% higher strength than 7075-T73 with equally high resistance to stress-corrosion cracking and improved DADT. Another has 30% higher strength than 7075-T6 with resistance to exfoliation corrosion of 7075-T76 and useful toughness. Metal matrix composites (prealloyed P/M matrix with SiC particulate) are being developed with modulus of elasticity values of 16-18 million psi and useful ductility. ARALL (Aramid Reinforced Aluminum Laminates), a fatigue-resistant material are being evaluated to assess their durability. Al-Fe-Ce alloys show higher specific strength than titanium alloys at temperatures up to 550 F.
- OSTI ID:
- 5367156
- Report Number(s):
- CONF-840909--
- Journal Information:
- TMS (The Metallurgical Society) Paper Selection; (USA), Journal Name: TMS (The Metallurgical Society) Paper Selection; (USA) Vol. 56; ISSN TMPSA; ISSN 0197-1689
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
360103* -- Metals & Alloys-- Mechanical Properties
ALLOYS
ALUMINIUM ALLOYS
ALUMINIUM BASE ALLOYS
CERIUM ALLOYS
CHEMICAL REACTIONS
COMPOSITE MATERIALS
CORROSION
CORROSION RESISTANCE
CRACKS
DENSITY
DUCTILITY
ELASTICITY
FRACTURE PROPERTIES
IRON ALLOYS
LITHIUM ALLOYS
MATERIALS
MECHANICAL PROPERTIES
OPTIMIZATION
PHYSICAL PROPERTIES
RARE EARTH ALLOYS
REINFORCED MATERIALS
RESEARCH PROGRAMS
STRESS CORROSION
TEMPERATURE EFFECTS
TENSILE PROPERTIES