Processing of α+β titanium alloys
First Claim
Patent Images
1. A process for forming an article from an α
- +β
titanium alloy comprising;
cold working the α
+β
titanium alloy at a temperature in the range of ambient temperature to 500°
F.; and
direct aging the cold-worked α
+β
titanium alloy at a temperature in the range of 700°
F. to 1200°
F.;
the α
+β
titanium alloy comprising, in weight percentages, from 2.90 to 5.00 aluminum, from 2.00 to 3.00 vanadium, from 0.40 to 2.00 iron, from 0.10 to 0.30 oxygen, titanium, and incidental impurities; and
wherein the cold working and direct aging forms an α
+β
titanium alloy article having an ultimate tensile strength in the range of 155 ksi to 200 ksi and an elongation in the range of 8% to 20%, at ambient temperature.
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Abstract
Processes for forming an article from an α+β titanium alloy are disclosed. The α+β titanium alloy includes, in weight percentages, from 2.90 to 5.00 aluminum, from 2.00 to 3.00 vanadium, from 0.40 to 2.00 iron, and from 0.10 to 0.30 oxygen. The α+β titanium alloy is cold worked at a temperature in the range of ambient temperature to 500° F., and then aged at a temperature in the range of 700° F. to 1200° F.
221 Citations
28 Claims
-
1. A process for forming an article from an α
- +β
titanium alloy comprising;cold working the α
+β
titanium alloy at a temperature in the range of ambient temperature to 500°
F.; anddirect aging the cold-worked α
+β
titanium alloy at a temperature in the range of 700°
F. to 1200°
F.;the α
+β
titanium alloy comprising, in weight percentages, from 2.90 to 5.00 aluminum, from 2.00 to 3.00 vanadium, from 0.40 to 2.00 iron, from 0.10 to 0.30 oxygen, titanium, and incidental impurities; andwherein the cold working and direct aging forms an α
+β
titanium alloy article having an ultimate tensile strength in the range of 155 ksi to 200 ksi and an elongation in the range of 8% to 20%, at ambient temperature. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23)
- +β
-
24. A process for forming an article from an α
- +β
titanium alloy comprising;hot working the α
+β
titanium alloy at a temperature in the range of 300°
F. to 25°
F. below the β
-transus temperature of the α
+β
titanium alloy;annealing the α
+β
titanium alloy at a temperature in the range of 1200°
F. to 1500°
F., wherein the annealing is performed after the hot working;cold working the α
+β
titanium alloy at a temperature in the range of ambient temperature to 500°
F., wherein the cold working is performed after the annealing; anddirect aging the cold worked α
+β
titanium alloy at a temperature in the range of 700°
F. to 1200°
F.;the α
+β
titanium alloy comprising, in weight percentages, from 2.90 to 5.00 aluminum, from 2.00 to 3.00 vanadium, from 0.40 to 2.00 iron, from 0.10 to 0.30 oxygen, titanium, and incidental impurities;wherein the cold working and direct aging forms an α
+β
titanium alloy article having an ultimate tensile strength in the range of 155 ksi to 200 ksi and an elongation in the range of 8% to 20%, at ambient temperature. - View Dependent Claims (26)
- +β
-
25. A process for forming an article from an α
- +β
titanium alloy comprising;drawing an α
+β
titanium alloy bar at a temperature in the range of ambient temperature to 500°
F. to reduce the cross-sectional area of the bar; anddirect aging the drawn α
+β
titanium alloy bar at a temperature in the range of 700°
F. to 1200°
F.;the α
+β
titanium alloy comprising, in weight percentages, from 2.90 to 5.00 aluminum, from 2.00 to 3.00 vanadium, from 0.40 to 2.00 iron, from 0.10 to 0.30 oxygen, titanium, and incidental impurities;wherein the drawing and direct aging forms an α
+β
titanium alloy article having an ultimate tensile strength in the range of 155 ksi to 200 ksi and an elongation in the range of 8% to 20%, at ambient temperature. - View Dependent Claims (27, 28)
- +β
Specification