Lithium loss suppression in alloys using hydrogen atmosphere

Details Lithium loss suppression in alloys using hydrogen atmosphere Lithium loss suppression in alloys using hydrogen atmosphere

1990-09-17

1992-10-13

Dean, R.

Metal treatment

Process of modifying or maintaining internal physical...

Heating or cooling of solid metal

C21D 174

Patent

active

051547783

ABSTRACT:
The invention utilizes a hydrogen atmosphere during the heat treatment of an Al-Li alloy. The presence of such a reducing atmosphere prevents the reaction of surface lithium atoms with atmosphere components that would cause a diffusion and subsequent depletion of lithium atoms in the region near the surface. As a result, the present invention suppresses lithium loss and consequently prevents the formation of agglomerated lithium atom vacancies which would otherwise develop into microscopic metallic porosity. The prevention of such a condition maintains high fatigue resistance and corrosion resistance in association with metallic strength.

REFERENCES:
patent: 4799976 (1989-01-01), Meyer

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