Metastable β-titanium alloys and methods of processing the same by direct aging
원문보기
IPC분류정보
국가/구분
United States(US) Patent
등록
국제특허분류(IPC7판)
C22F-001/18
C22C-014/00
출원번호
US-0083759
(2013-11-19)
등록번호
US-9523137
(2016-12-20)
발명자
/ 주소
Marquardt, Brian
Wood, John Randolph
Freese, Howard L.
Jablokov, Victor R.
출원인 / 주소
ATI PROPERTIES LLC
대리인 / 주소
K&L Gates LLP
인용정보
피인용 횟수 :
2인용 특허 :
183
초록▼
Metastable beta titanium alloys and methods of processing metastable β-titanium alloys are disclosed. For example, certain non-limiting embodiments relate to metastable β-titanium alloys, such as binary β-titanium alloys comprising greater than 10 weight percent molybdenum, having tensile strengths
Metastable beta titanium alloys and methods of processing metastable β-titanium alloys are disclosed. For example, certain non-limiting embodiments relate to metastable β-titanium alloys, such as binary β-titanium alloys comprising greater than 10 weight percent molybdenum, having tensile strengths of at least 150 ksi and elongations of at least 12 percent. Other non-limiting embodiments relate to methods of processing metastable β-titanium alloys, and more specifically, methods of processing binary β-titanium alloys comprising greater than 10 weight percent molybdenum, wherein the method comprises hot working and aging the metastable β-titanium alloy at a temperature below the β-transus temperature of the metastable β-titanium alloy for a time sufficient to form α-phase precipitates in the metastable β-titanium alloy. The metastable β-titanium alloys are not solution heat treated after hot working and prior to aging. Articles of manufacture comprising binary β-titanium alloys according to various non-limiting embodiments disclosed herein are also disclosed.
대표청구항▼
1. A metastable β-titanium alloy consisting of: titanium;greater than 10 weight percent molybdenum; andincidental impurities;the metastable β-titanium alloy having a tensile strength of at least 150 ksi, an elongation of at least 12 percent, and a microstructure comprising a uniform distribution of
1. A metastable β-titanium alloy consisting of: titanium;greater than 10 weight percent molybdenum; andincidental impurities;the metastable β-titanium alloy having a tensile strength of at least 150 ksi, an elongation of at least 12 percent, and a microstructure comprising a uniform distribution of α-phase precipitates in metastable phase regions of the metastable β-titanium alloy;wherein the α-phase precipitates comprise coarse grain size α-phase precipitates and fine grain size α-phase precipitates, and wherein an average grain size of the coarse grain size α-phase precipitates is larger than an average grain size of the fine grain size α-phase precipitates. 2. The metastable β-titanium alloy of claim 1, wherein the metastable β-titanium alloy has a tensile strength of 150 ksi to 180 ksi and an elongation of 12 percent to 20 percent. 3. The metastable β-titanium alloy of claim 1, wherein the metastable β-titanium alloy has a rotating beam fatigue strength of at least 650 MPa. 4. The metastable β-titanium alloy of claim 1, wherein the metastable β-titanium alloy consists of titanium, at least 14 weight percent molybdenum, and incidental impurities. 5. The metastable β-titanium alloy of claim 4, wherein the metastable β-titanium alloy has a tensile strength of 150 ksi to 180 ksi and an elongation of 12 percent to 20 percent. 6. The metastable β-titanium alloy of claim 4, wherein the metastable β-titanium alloy has a rotating beam fatigue strength of at least 650 MPa. 7. The metastable β-titanium alloy of claim 4, wherein the metastable β-titanium alloy has a tensile strength of at least 180 ksi and an elongation of at least 17 percent. 8. An article of manufacture comprising: a metastable β-titanium alloy consisting of titanium, greater than 10 weight percent molybdenum, and incidental impurities, the metastable β-titanium alloy having a tensile strength of at least 150 ksi, an elongation of at least 12 percent, and a microstructure comprising a uniform distribution of α-phase precipitates in metastable phase regions of the metastable β-titanium alloy, wherein the α-phase precipitates comprise coarse grain size α-phase precipitates and fine grain size α-phase precipitates, and wherein an average grain size of the coarse grain size α-phase precipitates is larger than an average grain size of the fine grain size α-phase precipitates. 9. The article of manufacture of claim 8, wherein the article of manufacture is selected from a biomedical component, an automotive component, an aerospace component, a chemical processing component, and a nautical component. 10. The article of manufacture of claim 8, wherein the article of manufacture is selected from a hip stem, a femoral hip stem, a femoral head, a modular ball, a bone screw, a cannulated screw, a hollow screw, a tibial tray, a knee component, a dental implant, and an intermedullary nail. 11. The article of manufacture of claim 8, where the article of manufacture is selected from a wire and a cable. 12. The article of manufacture of claim 8, wherein the metastable β-titanium alloy consists of titanium, at least 14 weight percent molybdenum, and incidental impurities. 13. The article of manufacture of claim 12, wherein the article of manufacture is selected from a biomedical component, an automotive component, an aerospace component, a chemical processing component, and a nautical component. 14. The article of manufacture of claim 12, wherein the article of manufacture is selected from a biomedical component comprising at least one of a hip stem, a femoral hip stem, a femoral head, a modular ball, a bone screw, a cannulated screw, a hollow screw, a tibial tray, a knee component, a dental implant, and an intermedullary nail. 15. The article of manufacture of claim 12, where the article of manufacture is selected from a wire and a cable. 16. A metastable β-titanium alloy consisting of: titanium;at least 14 weight percent molybdenum; andincidental impurities;the metastable β-titanium alloy having a tensile strength of at least 180 ksi, an elongation of at least 17 percent, and a microstructure comprising a uniform distribution of α-phase precipitates in metastable phase regions of the metastable β-titanium alloy. 17. The metastable β-titanium alloy of claim 16, wherein the metastable β-titanium alloy has a rotating beam fatigue strength of at least 650 MPa. 18. The metastable β-titanium alloy of claim 16, wherein the metastable β-titanium alloy has an elongation of 17 percent to 20 percent. 19. An article of manufacture comprising: a metastable β-titanium alloy consisting of titanium, at least 14 weight percent molybdenum, and incidental impurities, the metastable β-titanium alloy having a tensile strength of at least 180 ksi, an elongation of at least 17 percent, and a microstructure comprising a uniform distribution of α-phase precipitates in metastable phase regions of the metastable β-titanium alloy. 20. The article of manufacture of claim 19, wherein the article of manufacture is selected from a biomedical component, an automotive component, an aerospace component, a chemical processing component, and a nautical component. 21. The article of manufacture of claim 19, wherein the article of manufacture is selected from a hip stem, a femoral hip stem, a femoral head, a modular ball, a bone screw, a cannulated screw, a hollow screw, a tibial tray, a knee component, a dental implant, and an intermedullary nail. 22. The article of manufacture of claim 19, wherein the article of manufacture is selected from a wire and a cable. 23. The article of manufacture of claim 19, wherein the α-phase precipitates comprise coarse grain size α-phase precipitates and fine grain size α-phase precipitates, and wherein an average grain size of the coarse grain size α-phase precipitates is larger than an average grain size of the fine grain size α-phase precipitates. 24. The article of manufacture of claim 23, wherein the article of manufacture is selected from a wire and a cable. 25. An article of manufacture comprising: a metastable β-titanium alloy consisting of titanium, greater than 10 weight percent molybdenum, and incidental impurities, the metastable β-titanium alloy having a tensile strength of at least 150 ksi, an elongation of at least 12 percent, and a microstructure comprising a uniform distribution of α-phase precipitates in metastable phase regions of the metastable β-titanium alloy, wherein the article of manufacture is selected from a wire and a cable. 26. The article of manufacture of claim 25, wherein the metastable β-titanium alloy consists of titanium, at least 14 weight percent molybdenum, and incidental impurities.
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