US 11,697,870 B2
Method for producing straightened beta-titanium alloy elongated product forms
Mary E. Seals, Matthews, NC (US); Kayla J. Console, Indian Trail, NC (US); and Patrick C. Markle, Charlotte, NC (US)
Assigned to ATI PROPERTIES LLC, Albany, OR (US)
Appl. No. 16/648,545
Filed by ATI Properties LLC, Albany, OR (US)
PCT Filed Sep. 20, 2018, PCT No. PCT/US2018/051982
§ 371(c)(1), (2) Date Mar. 18, 2020,
PCT Pub. No. WO2019/060566, PCT Pub. Date Mar. 28, 2019.
Claims priority of provisional application 62/561,349, filed on Sep. 21, 2017.
Prior Publication US 2020/0216941 A1, Jul. 9, 2020
Int. Cl. C22F 1/18 (2006.01); C22C 14/00 (2006.01)
CPC C22F 1/183 (2013.01) [C22C 14/00 (2013.01)] 16 Claims
OG exemplary drawing
 
1. A method of producing a straightened beta-titanium alloy elongated product form, the method comprising:
solution treating a beta-titanium alloy product form having a chemical composition as specified in UNS R58150 or ASTM F2066-13;
aging the solution treated beta-titanium alloy product form in a first temperature range of 482° C. to 510° C.;
applying a stress to the solution treated and aged beta-titanium alloy product form in a second temperature range of ambient temperature to 482° C. for a time sufficient to improve straightness of the solution treated and aged beta-titanium alloy product form, to provide a straightened solution treated and aged beta-titanium alloy elongated product form, wherein the straightened solution treated and aged beta-titanium alloy elongated product form deviates from straight by no greater than 0.0625 inch (1.588 mm) over any 5 foot length (152.4 cm);
stress-relief aging the straightened solution treated and aged beta-titanium alloy elongated product form in a third temperature range of 426° C. to 510° C., to provide a stress-relief aged straightened beta-titanium alloy elongated product form; and
air cooling the stress-relief aged straightened beta-titanium alloy elongated product form from the third temperature range without applying a stress to the stress-relief aged straightened beta-titanium alloy elongated product form during the air cooling.