Titanium alloy

Patent metadata

Field	Value
Publication number	US-10094003-B2
Application number	US-201514594300-A
Country	US
Kind code	B2
Filing date	Jan 12, 2015
Priority date	Jan 12, 2015
Publication date	Oct 9, 2018
Grant date	Oct 9, 2018

Abstract

An alpha-beta titanium alloy comprises, in weight percentages: an aluminum equivalency in the range of 2.0 to 10.0; a molybdenum equivalency in the range of 0 to 20.0; 0.3 to 5.0 cobalt; and titanium. In certain embodiments, the alpha-beta titanium alloy exhibits a cold working reduction ductility limit of at least 25%, a yield strength of at least 130 KSI (896.3 MPa), and a percent elongation of at least 10%. A method of forming an article comprising the cobalt-containing alpha-beta titanium alloy comprises cold working the cobalt-containing alpha-beta titanium alloy to at least a 25 percent reduction in cross-sectional area. The cobalt-containing alpha-beta titanium alloy does not exhibit substantial cracking during cold working.

First claim

What is claimed is:

1. An alpha-beta titanium alloy comprising, in weight percentages:
at least 2.1 vanadium;
about 0.24 to 0.5 oxygen;
an aluminum equivalency in the range of 2.0 to 10.0;
a molybdenum equivalency in the range of 2.0 to 20.0;
0.3 to 5.0 cobalt;
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 7 , wherein the aluminum equivalency is in the range of 2.0 to 6.0 and the molybdenum equivalency is in the range of 2.0 to 10.

9. 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.

10. 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.

11. An alpha-beta titanium alloy comprising, in weight percentages:
2.0 to 7.0 aluminum;
at least 2.1 vanadium;
a molybdenum equivalency in the range of 2.0 to 5.0;
0.3 to 4.0 cobalt;
about 0.24 to 0.5 oxygen;
up to 0.25 nitrogen;
up to 0.3 carbon;
up to 0.4 of incidental impurities; and
titanium.

12. The alpha-beta titanium alloy according to claim 11 , 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.

13. The alpha-beta titanium alloy according to claim 11 , 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.

14. The alpha-beta titanium alloy according to claim 11 , further comprising greater than 0 up to 0.5 total weight percent of one or more of gold, silver, palladium, platinum, nickel, and iridium.

15. The alpha-beta titanium alloy according to claim 11 , wherein the alpha-beta titanium alloy exhibits a cold working reduction ductility limit of at least 25%.

16. The alpha-beta titanium alloy according to claim 11 , wherein the alpha-beta titanium alloy exhibits a cold working reduction ductility limit of at least 35%.

17. The alpha-beta titanium alloy according to claim 11 , 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. An alpha-beta titanium alloy comprising, in weight percentages:
an aluminum equivalency in the range of 2.0 to 10.0;
a molybdenum equivalency in the range of 2.0 to 5.0;
at least 2.1 vanadium;
0.3 to 5.0 cobalt;
titanium; and
incidental impurities; and
wherein the alpha-beta titanium alloy comprises no more than an incidental concentration of molybdenum.

19. The alpha-beta titanium alloy according to claim 18 , wherein the alpha-beta titanium alloy exhibits a cold working reduction ductility limit of at least 25%.

20. The alpha-beta titanium alloy according to claim 18 , wherein the alpha-beta titanium alloy exhibits a cold working reduction ductility limit of at least 35%.

21. The alpha-beta titanium alloy according to claim 18 , 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%.

22. The alpha-beta titanium alloy according to claim 18 , 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.

23. The alpha-beta titanium alloy according to claim 22 , further comprising greater than 0 up to 0.5 total weight percent of one or more of gold, silver, palladium, platinum, nickel, and iridium.

24. The alpha-beta titanium alloy according to claim 18 , further comprising greater than 0 up to 0.5 total weight percent of one or more of gold, silver, palladium, platinum, nickel, and iridium.

25. The alpha-beta titanium alloy according to claim 24 , wherein the aluminum equivalency is in the range of 2.0 to 6.0.

26. The alpha-beta titanium alloy according to claim 18 , 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.

27. An alpha-beta titanium alloy comprising, in weight percentages:
2.0 to 7.0 aluminum;
at least 2.1 vanadium;
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; and
wherein the alpha-beta titanium alloy comprises no more than an incidental concentration of molybdenum.

28. The alpha-beta titanium alloy according to claim 27 , 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.

29. The alpha-beta titanium alloy according to claim 27 , 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.

30. The alpha-beta titanium alloy according to claim 27 , further comprising greater than 0 up to 0.5 total weight percent of one or more of gold, silver, palladium, platinum, nickel, and iridium.

31. The alpha-beta titanium alloy according to claim 27 , wherein the alpha-beta titanium alloy exhibits a cold working reduction ductility limit of at least 25%.

32. The alpha-beta titanium alloy according to claim 27 , wherein the alpha-beta titanium alloy exhibits a cold working reduction ductility limit of at least 35%.

33. The alpha-beta titanium alloy according to claim 27 , 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%.

Assignees

• Ati Properties Llc

Inventors

• Foltz Iv John W

Classifications

• C22F1/183

  of titanium or alloys based thereon · CPC title

• C22C14/00 Primary

  Alloys based on titanium · CPC title

• C22C1/02

  by melting {(C22C1/1036 takes precedence)} · CPC title