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AssigneeThe United States of America as represented by the Secretary of the Navy
InventorJohn J. DeLuccia
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A powder-derived aluminum alloy is provided which contains throughout its se aluminum alloy matrix a fine dispersion of elemental molybdenum particles. The articles formed from the alloy exhibit improved resistance to environmentally-assisted cracking, such as stress corrosion cracking and corrosion fatigue, at room and moderately elevated temperatures. An aluminum alloy powder of a composition usually used to produce high-strength aluminum alloys is blended with molybdenum powder to form a homogeneous powder blend containing up to about 1.0% by weight molybdenum. The powder blend is consolidated, including compacting it and extruding or otherwise hot working it to a total reduction ratio of at least 16 to 1. The hot-worked product is then heat treated in a conventional manner to maximize other desirable properties, such as strength.
A method of producing an aluminum alloy having improved resistance to environmentally-assisted cracking at room and moderately elevated temperatures, comprising the steps of:
A method of producing an aluminum alloy having improved resistance to environmentally-assisted cracking at room and moderately elevated temperatures, comprising the steps of:
An aluminum alloy having improved resistance to environmentally-assisted cracking at room and moderately elevated temperatures, produced by consolidating a homogeneous blend of a base aluminum alloy powder and molybdenum powder.
Dependencies are inferred from the claim text.