Aluminum-lithium, aluminum-magnesium and magnesuim-lithium alloy

Details Aluminum-lithium, aluminum-magnesium and magnesuim-lithium alloy Aluminum-lithium, aluminum-magnesium and magnesuim-lithium alloy

1995-06-07

1997-10-14

Wyszomierski, George

Metal treatment

Stock

Age or precipitation hardened or strengthened

148416, 148417, 148439, 420533, 420545, 428614, C22C 2100

Patent

active

056767730

ABSTRACT:
Aluminum-based products are disclosed which contain 0.5 to 4.5 wt % lithium and which further contain no more than 1 ppm of each of the alkali metal impurity elements sodium, potassium, rubidium, and cesium. The products are capable of being aged to a peak-aged condition at which they have a grain boundary region substantially free of liquid phase eutectics comprised of sodium and potassium that form embrittlement phases at room temperature, and have a higher fracture toughness than a similar product containing more than 5 ppm in total of the alkali metal impurity elements.

REFERENCES:
patent: 5422066 (1995-06-01), Webster

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