Magnesium-lithium alloys of high toughness

Details Magnesium-lithium alloys of high toughness Magnesium-lithium alloys of high toughness

1995-04-19

1996-07-02

Andrews, Melvyn

Specialized metallurgical processes, compositions for use therei

Processes

Producing or treating free metal

75600, 148406, 148420, 420402, 420407, 420590, C22B 2600

Patent

active

055318061

ABSTRACT:
A process for preparing a high strength magnesium alloy comprising heating a melt comprised of a base metal of magnesium, greater than 0.5% of lithium, and at least one alkali metal impurity selected from the group consisting of sodium, potassium, rubidium and cesium, the total alkali metal present in an amount greater than 5 ppm, to a temperature of about 50.degree. to 200.degree. C. above the melting point of alloy being refined in a vacuum for a sufficient time to reduce the aggregate concentration of alkali metal impurities in the melt to less than about 5 ppm as measured by GDMS.

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