Aluminum Company of America

Kb Alloys

Robert W Hyland, Jr

Gary P Tarcy

Stephen F Baumann

Edward L Colvin

Jocelyn I Petit

Craig L Jensen

Charles W Bartges

K Dean Vinnedge

Brian Tyler Dunville

Gowri Subrahmanyam

Troy C Skeen

James P Quintenz

Stephen E Baumann

A photoluminescent phosphorescent material for emergency lighting and the like. An alkaline earth aluminate base material is alloyed with a lanthamide earth element and a transition metal element. When exposed to ambient lighting, the material of the present invention emits light in dark areas even after the loss of electrical power. The addition of a transition metal element such as Scandium (Sc) provides longer and brighter photoluminescence than is expected by the use of a lanthanide element alone.

Photoluminescent alkaline earth aluminate and method for making the same

An aluminum alloy product for use as a damage tolerant product for aerospace applications, including fuselage skin stock. The aluminum alloy composition contains about 3-7 wt % magnesium, about 0.03-0.2 wt % zirconium, about 0.2-1.2 wt % manganese, up to 0.15 wt % silicon and about 0.05-0.5 wt % of a dispersoid-forming element selected from the group consisting of: scandium, erbium, yttrium, gadolinium, holmium and hafnium, the balance being aluminum and incidental elements and impurities.

Aluminum magnesium alloy product containing dispersoids

There is disclosed an improved memory disk stock comprised of an alloy composition which includes: about 1-11 wt. % magnesium, preferably between about 2-7 wt. % Mg; up to about 0.3 wt. % zirconium preferably about 0.02-0.25 wt. % Zr; up to about 0.2 wt. % iron, up to about 0.2 wt. % silicon, and about 0.02-0.2 wt. % of a dispersoid-forming element selected from scandium, erbium, thulium, lutetium, ytterbium, hafnium and yttrium, the balance aluminum and incidental elements and impurities. With preferably about 0.05-0.15 wt. % of scandium added to such compositions, these disk stocks exhibit significant room temperature yield strength increases over the same compositions without any scandium added.

Memory disk sheet stock and method

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Oakmont, PA, United States of America

Robert W Hyland, Jr