US 10,502,252 B2Granted

Processing of alpha-beta titanium alloys

AssigneeATI Properties, Inc.

InventorsJohn W. Foltz, IV, Gavin Garside

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Abstract

A method for increasing tensile strength of a cold workable alpha-beta titanium alloy comprises solution heat treating a cold workable alpha-beta titanium alloy in a temperature range of Tβ-106° C. to Tβ-72.2° C. for 15 minutes to 2 hours; cooling the alpha-beta titanium alloy at a cooling rate of at least 3000° C./minute; cold working the alpha-beta titanium alloy to impart an effective strain in the range of 5 percent to 35 percent in the alloy; and aging the alpha-beta titanium alloy in a temperature range of Tβ-669° C. to Tβ-517° C. for 1 to 8 hours. Fastener stock and fasteners including solution treated, quenched, cold worked, and aged alpha-beta titanium alloys are also disclosed.

Claims21

Dependent claims

A method for increasing tensile strength of a cold workable alpha-beta titanium alloy, comprising:

solution heat treating a cold workable alpha-beta titanium alloy by heating the alpha-beta titanium alloy in a temperature range of the alpha-beta titanium alloy's beta transus temperature (Tβ)-106° C. to Tβ-72.2° C. for 15 minutes to 2 hours;
cooling the alpha-beta titanium alloy at a cooling rate of at least 3000° C. per minute to ambient temperature;
cold working the alpha-beta titanium alloy to impart an effective strain in the range of 13 percent to 35 percent;
and
aging the alpha-beta titanium alloy by heating the alpha-beta titanium alloy in a temperature range of Tβ-669° C. to Tβ-517° C. for 1 to 8 hours, wherein after the aging the alpha-beta titanium alloy exhibits an ultimate tensile strength of at least 204.2 ksi.

2 more elements

Dependencies are inferred from the claim text.

Facts

Application: 14/948,941Filed 23 Nov 2015
Published: US 2017/0146046 A125 May 2017
Granted: 10 Dec 2019
Term ends: Not estimatedThe source records don’t support an estimate.

Classification10 codes

F16B 33/00
Features common to bolt and nut
C22C 14/00
Alloys based on titanium
C22F 1/183
High-melting or refractory metals or alloys based thereon: of titanium or alloys based thereon
F16B 19/04
Bolts without screw-thread; Pins, including deformable elements ; Rivets: rivets; Spigots or the like fastened by riveting

Family

US 2017/0146046 A1Pre-grant publication · published 25 May 2017
US 10,502,252 B2This patent

From the US filing history. Foreign family members aren’t listed.

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