Titanium alloys including increased oxygen content and exhibiting improved mechanical properties

• US 20070193662A1
• Filed: 11/08/2005
• Published: 08/23/2007
• Est. Priority Date: 09/13/2005
• Status: Active Grant

• Current Assignee: ATI Properties LLC
• Original Assignee: ATI Properties Incorporated (Allegheny Technologies Incorporated)
• Inventors: Jablokov, Victor, Freese, Howard
• Granted Patent: US 8,337,750 B2
• Time in Patent Office: Days
• US Class Current: 148/421
• CPC Class Codes: C22C 14/00 Alloys based on titanium

Abstract

One aspect of the present disclosure is directed to a metastable β titanium alloy comprising, in weight percentages: up to 0.05 nitrogen; up to 0.10 carbon; up to 0.015 hydrogen; up to 0.10 iron; greater than 0.20 oxygen; 14.00 to 16.00 molybdenum; titanium; and incidental impurities. Articles of manufacture including the alloy also are disclosed.

Claims

1. A metastable β

titanium alloy comprising, in weight percentages based on total alloy;

up to 0.05 nitrogen;

up to 0.10 carbon;

up to 0.015 hydrogen

up to 0.10 iron;

greater than 0.20 oxygen;

14.00 to 16.00 molybdenum

titanium; and

incidental impurities.

2. The metastable β

titanium alloy of claim 1 comprising at least 83.54 titanium.

3. The metastable β

titanium alloy of claim 1 comprising up to 1.0 oxygen.

4. The metastable β

titanium alloy of claim 1 comprising up to 0.7 oxygen.

5. The metastable β

titanium alloy of claim 1 comprising up to 0.5 oxygen.

6. The metastable β

titanium alloy of claim 1 comprising greater than 0.25 oxygen.

7. The metastable β

titanium alloy of claim 1 comprising 0.25 up to 1.0 oxygen.

8. The metastable β

titanium alloy of claim 1 comprising 0.25 up to 0.7 oxygen.

9. The metastable β

titanium alloy of claim 1 comprising 0.25 up to 0.5 oxygen.

10. The metastable β

titanium alloy of claim 1 comprising 0.25 up to 1.0 oxygen and at least 83.54 titanium.

11. The metastable β

titanium alloy of claim 1 comprising 0.25 up to 0.7 oxygen and at least 83.54 titanium.

12. The metastable β

titanium alloy of claim 1 comprising 0.25 up to 0.5 oxygen and at least 83.54 titanium.

13. The metastable β

titanium alloy of claim 1, wherein, with the sole exception of oxygen content, the alloy has the composition of UNS R58150.

14. The metastable β

titanium alloy of claim 1, wherein, with the exception of oxygen content and the provisions of Section 9.1 under “

Special Requirements”

requiring a fully recrystallized beta phase structure, the alloy satisfies all of the requirements of ASTM F 2066-01 for wrought Ti-15Mo alloy suitable for use in the manufacture of surgical implants.

15. The metastable β

titanium alloy claim 1, wherein the alloy exhibits at least one of yield strength and ultimate tensile strength that is greater than a second alloy processed in an identical manner and, with one exception, having an identical chemistry, wherein the one exception is that the second alloy includes no greater than 0.20 weight percent oxygen.

16. The metastable β

titanium alloy of claim 1, wherein the alloy has improved cyclic fatigue properties relative to a second alloy processed in an identical manner and, with one exception, having an identical chemistry, wherein the one exception is that the second alloy includes no greater than 0.20 weight percent oxygen.

33. An article of manufacture comprising a metastable β

titanium alloy having the composition recited in claim 1.

34. The article of manufacture of claim 33, wherein the article is one of an article of equipment, a part, and a component useful in at least one application selected from:

partial and total joint replacement procedures;

fracture fixation in trauma cases;

cardiovascular procedures;

restorative and reconstructive dental procedures; and

spinal fusion and spinal disc replacement procedures.

35. The article of manufacture of claim 33, wherein the article is selected from the following biomedical components and parts:

a component for partial and total hip and knee replacement;

an intermedullary rod;

a fracture plate;

a spinal fixation replacement component; and

spinal disc replacement component;

a trauma screw;

a trauma plate;

a wire;

a cable;

a fastener;

a screw;

a nail;

an anchor;

a dental casting;

a dental implant;

an orthodontic arch wire;

an orthodontic anchor;

a heart valve ring;

a heart valve component;

profile and plate stocks;

a tool;

an instrument;

a fastener; and

an item of hardware.

36. The article of manufacture of claim 34, wherein the article is an article of equipment, a part, or a component useful in at least one application selected from:

aerospace applications;

automotive applications;

nuclear applications;

power generation applications;

jewelry; and

chemical processing applications.

37. The article of manufacture of claim 34, wherein the article is selected from the following components and parts:

automotive torsions bars;

aerospace fasteners;

corrosion-resistant thin sheet for military and commercial aircraft;

high performance racing and motorcycle springs; and

corrosion-resistant chemical processing tubing and fasteners.

17. A metastable β

titanium alloy consisting essentially of, in weight percentages;

up to 0.05 nitrogen;

up to 0.10 carbon;

up to 0.015 hydrogen

up to 0.10 iron;

greater than 0.20 oxygen;

14.00 to 16.00 molybdenum

at least 83.54 titanium; and

incidental impurities.

18. The metastable β

titanium alloy of claim 17, wherein the oxygen content of the alloy is no greater than 1.0.

19. The metastable β

titanium alloy of claim 17, wherein the oxygen content of the alloy is no greater than 0.7.

20. The metastable β

titanium alloy of claim 17, wherein the oxygen content of the alloy is no greater than 0.5.

21. The metastable β

titanium alloy of claim 17, wherein the oxygen content of the alloy is greater than 0.25.

22. The metastable β

titanium alloy of claim 17, wherein the oxygen content of the alloy is 0.25 up to 1.0 oxygen.

23. The metastable β

titanium alloy of claim 17, wherein the oxygen content of the alloy is 0.25 up to 0.7.

24. The metastable β

titanium alloy of claim 17, wherein the oxygen content of the alloy is 0.25 up to 0.5.

25. The metastable β

titanium alloy of claim 17, wherein, with the sole exception of oxygen content, the alloy has the composition of UNS R58150.

26. The metastable β

titanium alloy of claim 17, wherein, with the exception of oxygen content and the provisions of Section 9.1 under “

Special Requirements”

requiring a fully recrystallized beta phase structure, the alloy satisfies all of the requirements of ASTM F 2066-01 for wrought Ti-15Mo alloy suitable for use in the manufacture of surgical implants.

27. The metastable β

titanium alloy of claim 17, wherein the alloy has at least one of yield strength and ultimate tensile strength that is greater than a second alloy processed in an identical manner and, with one exception, having an identical chemistry, wherein the one exception is that second alloy includes no greater than 0.20 weight percent oxygen based on the total weight of the second alloy.

28. The metastable β

titanium alloy of claim 17, wherein the alloy has improved cyclic fatigue properties relative to a second alloy processed in an identical manner and, with one exception, having an identical chemistry, wherein the one exception is that second alloy includes no greater than 0.20 weight percent oxygen based on the total weight of the second alloy.

32. The metastable β

titanium alloy of claim 20, wherein the alloy has improved cyclic fatigue properties relative to a second alloy processed in an identical manner and, with one exception, having an identical chemistry, wherein the one exception is that the second alloy includes no greater than 0.20 weight percent oxygen.

38. The article of manufacture of claim 34, wherein the metastable β

titanium alloy has the composition recited in claim 17.

29. A metastable β

titanium alloy consisting of, in weight percentages;

up to 0.05 nitrogen;

up to 0.10 carbon;

up to 0.015 hydrogen

up to 0.10 iron;

greater than 0.20 oxygen;

14.00 to 16.00 molybdenum

at least 83.54 titanium; and

incidental impurities.

30. The metastable β

titanium alloy of claim 29, wherein, with the sole exception of oxygen content, the alloy has the composition of UNS R58150.

31. The metastable β

titanium alloy of claim 29, wherein the alloy has at least one of yield strength and ultimate tensile strength that is greater than a second alloy processed in an identical manner and, with one exception, having an identical chemistry, wherein the one exception is that the second alloy includes no greater than 0.20 weight percent oxygen.

39. The article of manufacture of claim 34, wherein the metastable β

titanium alloy has the composition recited in claim 29.