B - Operations – Transporting – 22 – F
Patent
B - Operations, Transporting
22
F
B22F 9/04 (2006.01) B21J 5/00 (2006.01) B22D 17/08 (2006.01) B22F 5/00 (2006.01) B23K 20/12 (2006.01) B23K 20/233 (2006.01) B21K 1/58 (2006.01)
Patent
CA 2411124
A method for preparing ultra-fine grain titanium or titanium-alloy articles 78 used for adjoining or assembling of detail components. Coarse- grained titanium or titanium-alloy materials 52 typically are heated and forced under constant pressure through a friction stir processing tooling device 50 containing a stirring chamber 54 and a stirring rod 58. As the material is passed through the stirring chamber 54, the stirring rod 58 solutionizes the titanium or titanium-alloy material 52 and stirs the material to obtain a homogeneous or uniform material condition. As the processed material exits the stirring chamber 54 of the friction stir process tooling device 50, it reconsolidates as an extremely homogeneous structure possessing ultra- fine grain structure. Titanium or titanium-alloy materials 52 having been processed to achieve such ultra-fine grain material structure may then be manufactured into aerospace structural articles or components such as fasteners 78 or articles that do not require a subsequent thermal or heat-treatment steps. The resulting fasteners; articles or components have improved material performance characteristics associated with this ultra-fine grain material structure.
Keener Steven G.
Litwinski Edward
Smart & Biggar
The Boeing Company
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