Nickel-base alloys

Patent metadata

Field	Value
Publication number	US-12492452-B2
Application number	US-202217751919-A
Country	US
Kind code	B2
Filing date	May 24, 2022
Priority date	Jul 9, 2021
Publication date	Dec 9, 2025
Grant date	Dec 9, 2025

Abstract

A nickel-base alloy comprises, in weight percentages based on the total weight of the nickel-base alloy: 1.6% to 3.0% aluminum; 0.3% to 1.5% titanium; 1.5% to 4% tantalum; and nickel.

First claim

What is claimed is:

1 . A nickel-base alloy comprising, in weight percentages based on total weight of the nickel-base alloy:
1.6% to 2.5% aluminum; 0.5% to 1.3% titanium; 2.2% to 4% tantalum; greater than 6% to 9.5% molybdenum; greater than 0 to less than 0.5% tungsten; 7% to 15% cobalt; 18% to 21% chromium; 0 to less than 0.5% niobium; greater than 0 to 2% manganese; greater than 0 to 0.5% silicon; 0 to 0.05% boron; and nickel; wherein the nickel-base alloy exhibits a stress rupture life greater than 140 hours when tested at 1500° F. (816° C.) under stress of 35 ksi (241.3 MPa).

2 . The nickel-base alloy of claim 1 , comprising 1.7% to 2.4% aluminum, in weight percentages based on total weight of the nickel-base alloy.

3 . The nickel-base alloy of claim 1 , comprising 2.2% to 3% tantalum, in weight percentages based on total weight of the nickel-base alloy.

4 . The nickel-base alloy of claim 1 , comprising 2.2% to 2.9% tantalum, in weight percentages based on total weight of the nickel-base alloy.

5 . The nickel-base alloy of claim 1 , comprising, in weight percentages based on total weight of the nickel-base alloy:
1.6% to 2.5% aluminum; 0.5% to 1.3% titanium; 2.2% to 4% tantalum; 18% to 21% chromium; 7% to 15% cobalt; greater than 6% to 9.5% molybdenum; greater than 0 to less than 0.5% tungsten; 0 to less than 0.5% niobium; 0 to 0.5% carbon; 0 to 0.05% boron; 0 to 5% iron; greater than 0 to 2% manganese; 0 to 2% vanadium; 0 to 2% copper; greater than 0 to 0.5% silicon; 0 to 1% zirconium; 0 to 1% hafnium; 0 to 1% rhenium; a total of 0 to 1% of rare earth elements; nickel; and impurities.

6 . The nickel-base alloy of claim 1 , comprising, in weight percentages based on total weight of the nickel-base alloy:
1.6% to 2.5% aluminum; 0.5% to 1.3% titanium; 2.2% to 3% tantalum; 18% to 21% chromium; 7% to 15% cobalt; greater than 6% to 9.5% molybdenum; greater than 0 to less than 0.5% tungsten; 0 to less than 0.5% niobium; greater than 0 to 2% manganese; greater than 0 to 0.5% silicon; 0 to 0.2% carbon; 0 to 0.05% boron; 0 to 3% iron; 0 to 2% manganese; 0 to 2% vanadium; 0 to 2% copper; 0 to 1% silicon; 0 to 1% zirconium; 0 to 1% hafnium; 0 to 1% rhenium; a total of 0 to 1% of rare earth elements; nickel; and impurities.

7 . The nickel-base alloy of claim 1 , comprising, in weight percentages based on total weight of the nickel-base alloy:
1.7% to 2.4% aluminum; 0.5% to 1.3% titanium; 2.2% to 2.9% tantalum; 18% to 21% chromium; 7% to 15% cobalt; greater than 6% to 9.5% molybdenum; greater than 0 to less than 0.5% tungsten; 0 to less than 0.5% niobium; greater than 0 to 2% manganese; greater than 0 to 0.5% silicon; 0 to 0.05% boron; nickel; and impurities.

8 . The nickel-base alloy of claim 1 , comprising, in weight percentages based on total weight of the nickel-base alloy:
1.7% to 2.4% aluminum; 0.5% to 1.3% titanium; 2.2% to 2.9% tantalum; 18% to 21% chromium; 7% to 15% cobalt; greater than 6% to 9.5% molybdenum; greater than 0 to less than 0.5% tungsten; 0 to less than 0.5% niobium; 0 to 0.2% carbon; 0 to 0.05% boron; 0 to 1.5% iron; greater than 0 to 2% manganese; 0 to 2% vanadium; 0 to 2% copper; greater than 0 to 0.5% silicon; 0 to 1% zirconium; 0 to 1% hafnium; 0 to 1% rhenium; a total of 0 to 1% of rare earth elements; nickel; and impurities.

9 . The nickel-base alloy of claim 1 , provided that a composition of the nickel-base alloy satisfies the following equation, in weight percentage concentrations based on total weight of the nickel-base alloy:
2.5<{[Al]+0.56×[Ti]+0.29×[Nb]+0.15×[Ta]}<3.4.

10 . The nickel-base alloy of claim 1 , provided that a composition of the nickel-base alloy satisfies the following equation, in weight percentage concentrations based on total weight of the nickel-base alloy:
5%<{[Mo]+0.52×[W]}<10%.

11 . The nickel-base alloy of claim 1 , provided that a composition of the nickel-base alloy satisfies the following equation, in weight percentage concentrations based on total weight of the nickel-base alloy:
0.8%≤{[Nb]+0.51×[Ta]}≤2.4%.

12 . The nickel-base alloy of claim 1 , wherein the nickel-base alloy exhibits a stress rupture life greater than 180 hours when tested at 1500° F. (816° C.) under stress of 35 ksi (241.3 MPa).

13 . A nickel-base alloy comprising, in weight percentages based on total weight of the nickel-base alloy:
1.6% to 2.5% aluminum; 0.5% to 1.3% titanium; 2.2% to 4% tantalum; 18% to 21% chromium; 7% to 15% cobalt; greater than 6% to 9.5% molybdenum; greater than 0 to less than 0.5% tungsten; 0 to less than 0.5% niobium; 0 to 0.5% carbon; 0 to 0.05% boron; 0 to 5% iron; greater than 0 to 2% manganese; 0 to 2% vanadium; 0 to 2% copper; greater than 0 to 0.5% silicon; 0 to 1% zirconium; 0 to 1% hafnium; 0 to 1% rhenium; a total of 0 to 1% of rare earth elements; and nickel; wherein the nickel-base alloy exhibits a stress rupture life greater than 140 hours when tested at 1500° F. (816° C.) under stress of 35 ksi (241.3 MPa); provided that a composition of the nickel-base alloy satisfies the following equations:
2.5<{[Al]+0.56×[Ti]+0.29×[Nb]+0.15×[Ta]}<3.4

5<{[Mo]+0.52×[W]}<10

0.8≤{[Nb]+0.51×[Ta]}≤2.4.

14 . The nickel-base alloy of claim 13 comprising, in weight percentages based on total weight of the nickel-base alloy:
1.7% to 2.4% aluminum;
0.5% to 1.3% titanium;
2.2% to 2.9% tantalum;
18% to 21% chromium;
7% to 15% cobalt;
greater than 6% to 9.5% molybdenum;
greater than 0 to less than 0.5% tungsten;
0 to less than 0.5% niobium;
0 to 0.2% carbon;
0 to 0.05% boron;
0 to 1.5% iron;
greater than 0 to 2% manganese;
0 to 2% vanadium;
0 to 2% copper;
greater than 0 to 0.5% silicon;
0 to 1% zirconium;
0 to 1% hafnium;
0 to 1% rhenium;
a total of 0 to 1% of rare earth elements; and
nickel.

15 . The nickel-base alloy of claim 14 , provided that a composition of the nickel-base alloy satisfies the following:
2.6<{[Al]+0.56×[Ti]+0.29×[Nb]+0.15×[Ta]}<3.3
6<{[Mo]+0.52×[W]}<10
0.8≤{[Nb]+0.51×[Ta]}≤1.7.

16 . The nickel-base alloy of claim 13 , wherein the nickel-base alloy exhibits a stress rupture life greater than 180 hours when tested at 1500° F. (816° C.) under stress of 35 ksi (241.3 MPa).

17 . A nickel-base alloy consisting of, in weight percentages based on total weight of the nickel-base alloy:
1.6% to 2.5% aluminum; 0.5% to 1.3% titanium; 2.2% to 4% tantalum; 18% to 21% chromium; 7% to 15% cobalt; greater than 6% to 9.5% molybdenum; greater than 0 to less than 0.5% tungsten; 0 to less than 0.5% niobium; 0 to 0.5% carbon; 0 to 0.05% boron; 0 to 5% iron; greater than 0 to 2% manganese; 0 to 2% vanadium; 0 to 2% copper; greater than 0 to 0.5% silicon; 0 to 1% zirconium; 0 to 1% hafnium; 0 to 1% rhenium; a total of 0 to 1% of rare earth elements; nickel; and impurities; wherein the nickel-base alloy exhibits a stress rupture life greater than 140 hours when tested at 1500° F. (816° C.) under stress of 35 ksi (241.3 MPa).

18 . The nickel-base alloy of claim 17 , provided that a composition of the nickel-base alloy satisfies the following:
2.5<{[Al]+0.56×[Ti]+0.29×[Nb]+0.15×[Ta]}<3.4
5<{[Mo]+0.52×[W]}<10
0.8≤{[Nb]+0.51×[Ta]}≤2.4.

19 . The nickel-base alloy of claim 17 , wherein a tantalum content is 2.2% to 3%, in w

Assignees

• Ati Properties Llc

Inventors

• Jankowski Joseph A

Classifications

• C22C19/055 Primary

  with the maximum Cr content being at least 20% but less than 30% · CPC title

• C22C19/056 Primary

  with the maximum Cr content being at least 10% but less than 20% · CPC title