Granted Patent B2

US 12,565,695 · App. 13/399,975 · Granted Mar 3, 2026

Inventors: Julien Boselli (Pittsburgh, PA); Roberto J. Rioja (Murrysville, PA); Gregory B. Venema (Bettendorf, IA); Ralph R. Sawtell (Gibsonia, PA)

Assignee: ARCONIC TECHNOLOGIES LLC

C22C21/00C22C21/12C22C21/16C22C21/18C22F1/04C22F1/057

Abstract

Claims (22)

1 . An aluminum alloy product, the aluminum alloy consisting of:

from 3.20 to 3.60 wt. % Cu;

from 0.15 to 0.30 wt. % Mg;

from 1.05 to 1.25 wt. % Li;

from 0.05 to 0.50 wt. % of at least one grain structure control element, wherein the at least one grain structure control element is selected from the group consisting of Zr, Sc, Cr, V, Hf, and combinations thereof;

from 0.20 to 1.0 wt. % Zn;

from 0.2 to 0.5 wt. % Mn;

up to 0.12 wt. % Si;

up to 0.15 wt. % Fe;

up to 0.15 wt. % Ti;

up to 0.05 wt. % of any other element, with the total of these other elements not exceeding 0.15 wt. %, wherein the other elements include silver (Ag); and

the balance being aluminum,

wherein the aluminum alloy product has a thickness of 50.8-76.2 mm and realizes a strength-toughness relationship that satisfies the expression:

FT-SL≥=−0.199(TYS−ST)+116;

wherein TYS-ST is the ST tensile yield strength of the plate in MPa as measured in accordance with ASTM Standard E8 and ASTM B557,

wherein FT-SL is the S-L plane strain fracture toughness (KIC) of the plate in MPa√Vm as measured in accordance with ASTM E399,

wherein the aluminum alloy product realizes a TYS-ST of at least 400 MPa, and wherein the aluminum alloy product realizes a FT-SL of at least about 22 MPa√m.

2 . The aluminum alloy product of claim 1 , wherein the grain structure control element is at least Zr, and wherein the alloy contains 0.05 to 0.20 wt. % Zr.

3 . The aluminum alloy product of claim 1 , comprising at least 3.40 wt. % Cu.

4 . The aluminum alloy product of claim 1 , comprising not greater than 0.25 wt. % Mg.

5 . The aluminum alloy product of claim 4 , comprising at least 1.150 wt. % Li.

6 . The aluminum alloy product of claim 4 , comprising not greater than 0.50 wt. % Zn.

Assignments (12)

Continuity (2)

References Cited (153)