High damage tolerant Al-Cu alloy

Details High damage tolerant Al-Cu alloy High damage tolerant Al-Cu alloy

2007-11-30

2010-10-19

King, Roy (Department: 1793)

Metal treatment

Process of modifying or maintaining internal physical...

With casting or solidifying from melt

C148S693000, C148S700000

Reexamination Certificate

active

07815758

ABSTRACT:
Disclosed is a high damage tolerant Al—Cu alloy of the AA2000 series having a high toughness and an improved fatigue crack growth resistance, including the following composition (in weight percent) Cu 3.8-4.7, Mg 1.0-1.6, Zr 0.06-0.18, Cr<0.15, Mn>0-0.50, Fe≦0.15, Si≦0.15, and Mn-containing dispersoids, the balance essentially aluminum and incidental elements and impurities, wherein the Mn-containing dispersoids are at least partially replaced by Zr-containing dispersoids. There is also disclosed a method for producing a rolled high damage tolerant Al—Cu alloy product having a high toughness and an improved fatigue crack growth resistance, and applications of that product as a structural member of an aircraft.

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