Composition and Method for Producing an Aluminum Alloy Resistant to Environmentally-Assisted Cracking.
Patent Application, Filed 15 Oct 90,
DEPARTMENT OF THE NAVY WASHINGTON DC
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The present invention relates generally to aluminum alloys and more particularly to high-strength, molybdenum-containing, powder-derived aluminum alloys which have improved resistance to environmentally assisted cracking at room or moderately elevated temperatures. High-strength aluminum alloys, such as those in the 7000 series Aluminum Association designation, are used extensively for structural aircraft components because of their combined lightness of weight and high strength. Generally speaking, these high-strength aluminum alloys suffer from poor resistance to environmentally-assisted cracking. For instance, when under load and subjected to a corrosive environment such as the sea water environment, these alloys are susceptible to stress corrosion cracking.
- Metallurgy and Metallography