Composition and method for producing an aluminum alloy resistant

Details Composition and method for producing an aluminum alloy resistant Composition and method for producing an aluminum alloy resistant

1990-10-15

1991-10-29

Dean, R.

Metal treatment

Compositions

Heat treating

75249, 148 115P, 148437, C22F 104, B22F 302

Patent

active

050613235

ABSTRACT:
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.

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