2xxx aluminum alloys

Patent metadata

Field	Value
Publication number	US-2021262065-A1
Application number	US-202117314924-A
Country	US
Kind code	A1
Filing date	May 7, 2021
Priority date	Nov 16, 2018
Publication date	Aug 26, 2021
Grant date	—

Abstract

New 2xxx aluminum alloys are disclosed. The new 2xxx aluminum alloys generally include from 0.08 to 0.20 wt. % Ti. The new 2xxx aluminum alloys may realize an improved combination of two or more of strength, fracture toughness, elongation, and corrosion resistance, for instance.

First claim

What is claimed is:

1 . A 2xxx aluminum alloy comprising:
from 0.08 to 0.20 wt. % Ti from 4.5 to 5.5 wt. % Cu; from 0.20 to 0.6 wt. % Mn; from 0.20 to 0.8 wt. % Mg; from 0.05 to 0.60 wt. % Ag; up to 1.0 wt. % Zn; up to 0.30 wt. % Fe; up to 0.20 wt. % Si; up to 0.25 wt. % Zr; up to 0.25 wt. % Cr; and up to 0.25 wt. % V;
the balance being aluminum, incidental elements and impurities.

2 . The 2xxx aluminum alloy of claim 1 , wherein the 2xxx aluminum alloy includes:
from 0.08 to 0.13 wt. % Ti; from 4.8 to 5.0 wt. % Cu; from 0.40 to 0.60 wt. % Zn; from 0.30 to 0.40 wt. % Mn; from 0.30 to 0.50 wt. % Mg; from 0.30 to 0.40 wt. % Ag; from 0.08 to 0.12 wt. % Zr; up to 0.15 wt. % Fe; up to 0.10 wt. % Si; up to 0.05 wt. % Cr; and up to 0.05 wt. % V;
the balance being aluminum, incidental elements and impurities, wherein the 2xxx aluminum alloy includes not greater than 0.15 wt. %, in total, of the impurities, and wherein the 2xxx aluminum alloy includes not greater than 0.05 wt. % of each of the impurities.

3 . The 2xxx aluminum alloy of claim 1 , wherein the 2xxx aluminum alloy is in the form of a wrought product, and wherein there wrought product has a cross-sectional thickness of from at 12.7 mm to 305 mm.

4 . The 2xxx aluminum alloy of claim 3 , wherein the wrought product is in the T8 temper and wherein the wrought product realizes a tensile yield strength (LT) of at least 390 MPa.

5 . The 2xxx aluminum alloy of claim 4 , wherein the wrought product realizes a plane-strain (K IC ) fracture toughness (T-L) of at least 30 MPa-sqrt-m.

6 . The 2xxx aluminum alloy of claim 5 , wherein the wrought product realizes an elongation (LT) of at least 6.0%.

7 . The 2xxx aluminum alloy of claim 6 , wherein the wrought product is (a) LT stress corrosion cracking resistant, (b) ST stress corrosion cracking resistant or (c) both LT stress corrosion cracking resistant and ST stress corrosion cracking resistant.

8 . A 2x39 aluminum alloy, wherein the 2x39 aluminum alloy comprises from 0.08 to 0.20 wt. % Ti.

9 . The 2x39 aluminum alloy of claim 8 , wherein the 2x39 aluminum alloy includes from 0.05 to 0.20 wt. % Zr.

10 . The 2x39 aluminum alloy of claim 9 , wherein the 2x39 aluminum alloy includes from 0.20 to 0.90 wt. % Zn.

11 . The 2x39 aluminum alloy of claim 8 , wherein the 2x39 aluminum alloy is a 2039 aluminum alloy.

12 . The 2039 aluminum alloy of claim 11 , wherein the 2039 aluminum alloy includes from 0.08 to 0.20 wt. % Ti and from 0 to 0.10 wt. % Zr.

13 . The 2x39 aluminum alloy of claim 8 , wherein the 2x39 aluminum alloy is a 2139 aluminum alloy.

Assignees

• Arconic Tech Llc

Inventors

• Magnusen Paul E
• Karabin Lynette M
• Bovard Francine S
• Boselli Julien

Classifications

• C22C21/14

  with silicon · CPC title

• C22C21/18 Primary

  with zinc · CPC title

• C22C21/16

  with magnesium · CPC title

• C22C21/12 Primary

  with copper as the next major constituent · CPC title