Dispersion strengthened mechanically alloyed al-mg-li

Details Dispersion strengthened mechanically alloyed al-mg-li Dispersion strengthened mechanically alloyed al-mg-li

C - Chemistry, Metallurgy

22

C

75/84, 148/55.5

C22C 21/06 (2006.01) C22C 32/00 (2006.01)

Patent

CA 1230507

DISPERSION STRENGTHENED MECHANICALLY ALLOYED Al-Mg-Li ABSTRACT OF THE DISCLOSURE A dispersion strengthened mechanically alloyed aluminum-base alloy system is provided by a process comprising solution treating an alloy consisting essentially of, by weight, about 0.5 up to about 4% lithium, above 1% up to about 5% magnesium, about 0.5% up to about 2% carbon, a small but effective amount of oxygen which does not exceed 1%, and the balance essentially aluminum, the dispersoid content of the alloy being up to about 8 volume %. Preferred embodiments of the alloy are in the solution treated or solution treated and underaged condition are characterized by an improved combination of strength, low density, ductility, and fracture toughness.

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