Metastable beta-titanium alloys and methods of processing the same by direct aging
First Claim
1. A method of processing a binary β
- -titanium alloy, the method comprising;
hot working a binary β
-titanium alloy consisting essentially of titanium, from 14 weight percent to 16 weight percent molybdenum, and incidental impurities at a hot working temperature above the β
-transus temperature of the binary β
-titanium alloy; and
direct aging the binary β
-titanium alloy, wherein direct aging comprises heating the binary β
-titanium alloy in the hot worked condition at an aging temperature ranging from 850°
F. to 1375°
F. for a time sufficient to form α
-phase precipitates within the binary β
-titanium alloy.
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Abstract
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 direct 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. Articles of manufacture comprising binary β-titanium alloys according to various non-limiting embodiments disclosed herein are also disclosed.
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Citations
17 Claims
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1. A method of processing a binary β
- -titanium alloy, the method comprising;
hot working a binary β
-titanium alloy consisting essentially of titanium, from 14 weight percent to 16 weight percent molybdenum, and incidental impurities at a hot working temperature above the β
-transus temperature of the binary β
-titanium alloy; anddirect aging the binary β
-titanium alloy, wherein direct aging comprises heating the binary β
-titanium alloy in the hot worked condition at an aging temperature ranging from 850°
F. to 1375°
F. for a time sufficient to form α
-phase precipitates within the binary β
-titanium alloy. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14)
- -titanium alloy, the method comprising;
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15. A method of processing a metastable β
- -titanium alloy, comprising;
hot working a metastable β
-titanium alloy consisting essentially of titanium, from 14 weight percent to 16 weight percent molybdenum, up to 0.05 weight percent nitrogen, up to 0.10 weight percent carbon, up to 0.015 weight percent hydrogen;
up to 0.10 weight percent iron, and up to 0.20 weight percent oxygen at a hot working temperature above the β
-transus temperature of the metastable β
-titanium alloy; anddirect aging the metastable β
-titanium alloy, wherein direct aging comprises heating the metastable β
-titanium alloy in the hot worked condition at a first aging temperature below the β
-transus temperature of the metastable titanium alloy for a time sufficient to form and at least partially coarsen at least one α
-phase precipitate within at least a portion of the metastable β
-titanium alloy. - View Dependent Claims (16, 17)
- -titanium alloy, comprising;
Specification