Titanium alloy

• US 10,619,226 B2
• Filed: 09/05/2018
• Issued: 04/14/2020
• Est. Priority Date: 01/12/2015
• Status: Active Grant

• Current Assignee: ATI Properties LLC
• Original Assignee: ATI Properties LLC
• Inventors: Foltz, IV, John W.
• Primary Examiner(s): Roe, Jessee R
• Application Number:
  US16/122,450
• Publication Number:
  US 20200024697A1
• Time in Patent Office: 587 Days
• CPC Class Codes: C22C 14/00 Alloys based on titanium
• CPC Class Codes: C22F 1/183 of titanium or alloys based thereon

Abstract

According to one embodiment, an alpha-beta titanium alloy comprises, in weight percentages: an aluminum equivalency in the range of about 6.7 to 10.0; a molybdenum equivalency in the range of 0 to 5.0; at least 2.1 vanadium; 0.3 to 5.0 cobalt; titanium; and incidental impurities.

Claims

1. An alpha-beta titanium alloy comprising, in weight percentages:

up to about 4.1 aluminum;

at least 2.1 vanadium;

0.3 to 5.0 cobalt;

an aluminum equivalency in the range of 6.7 to 10.0;

a molybdenum equivalency in the range of 2.0 to 20.0;

titanium; and

incidental impurities.

2. The alpha-beta titanium alloy according to claim 1, wherein the alpha-beta titanium alloy exhibits a cold working reduction ductility limit of at least 25%.

3. The alpha-beta titanium alloy according to claim 1, wherein the alpha-beta titanium alloy exhibits a cold working reduction ductility limit of at least 35%.

4. The alpha-beta titanium alloy according to claim 1, wherein the alpha-beta titanium alloy exhibits a yield strength of at least 130 KSI (896.3 MPa) and a percent elongation of at least 10%.

5. The alpha-beta titanium alloy according to claim 1, further comprising greater than 0 up to 0.3 total weight percent of one or more of cerium, praseodymium, neodymium, samarium, gadolinium, holmium, erbium, thulium, yttrium, scandium, beryllium, and boron.

6. The alpha-beta titanium alloy according to claim 5, wherein the molybdenum equivalency is in the range of 2.0 to 10.

7. The alpha-beta titanium alloy according to claim 1, further comprising greater than 0 up to 0.5 total weight percent of one or more of gold, silver, palladium, platinum, nickel, and iridium.

8. The alpha-beta titanium alloy according to claim 5, further comprising greater than 0 up to 0.5 total weight percent of one or more of gold, silver, palladium, platinum, nickel, and iridium.

9. The alpha-beta titanium alloy according to claim 1, further comprising one or more of:

greater than 0 to 6 tin;

greater than 0 to 0.6 silicon; and

greater than 0 to 10 zirconium.

17. The alpha-beta titanium alloy according to claim 1, wherein the aluminum equivalency is in the range of 6.8 to 10.0.

10. An alpha-beta titanium alloy comprising, in weight percentages:

2.0 to about 4.1 aluminum;

at least 2.1 vanadium;

an aluminum equivalency in the range of 6.7 to 10.0;

a molybdenum equivalency in the range of 2.0 to 5.0;

0.3 to 4.0 cobalt;

up to 0.5 oxygen;

up to 0.25 nitrogen;

up to 0.3 carbon;

up to 0.4 of incidental impurities; and

titanium.

11. The alpha-beta titanium alloy according to claim 10, further comprising one or more of:

greater than 0 to 6 tin;

greater than 0 to 0.6 silicon;

greater than 0 to 10 zirconium;

greater than 0 to 0.3 palladium; and

greater than 0 to 0.5 boron.

12. The alpha-beta titanium alloy according to claim 10, further comprising greater than 0 up to 0.3 total weight percent of one or more of cerium, praseodymium, neodymium, samarium, gadolinium, holmium, erbium, thulium, yttrium, scandium, beryllium, and boron.

13. The alpha-beta titanium alloy according to claim 10, further comprising greater than 0 up to 0.5 total weight percent of one or more of gold, silver, palladium, platinum, nickel, and iridium.

14. The alpha-beta titanium alloy according to claim 10, wherein the alpha-beta titanium alloy exhibits a cold working reduction ductility limit of at least 25%.

15. The alpha-beta titanium alloy according to claim 10, wherein the alpha-beta titanium alloy exhibits a cold working reduction ductility limit of at least 35%.

16. The alpha-beta titanium alloy according to claim 10, wherein the alpha-beta titanium alloy exhibits a yield strength of at least 130 KSI (896.3 MPa) and a percent elongation of at least 10%.

18. The alpha-beta titanium alloy according to claim 10, wherein the aluminum equivalency is in the range of 6.8 to 10.0.