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(11)

EP 4 281 593 A1

(12)

(43) Date of publication: 29.11.2023 Bulletin 2023/48 (21) Application number: 22743027.9 (22) Date of filing: 18.01.2022

(51) International Patent Classification (IPC):  C22B 21/00(2006.01) C22C 21/00(2006.01) C22B 1/00(2006.01) (52) Cooperative Patent Classification (CPC): C22C 21/00; C22B 7/003; C22B 7/005; C22B 21/0092 (86) International application number: PCT/US2022/012740 (87) International publication number: WO 2022/159374 (28.07.2022 Gazette 2022/30)

(84) Designated Contracting States: AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR Designated Extension States: BA ME Designated Validation States: KH MA MD TN (30) Priority: 19.01.2021 US 202163139007 P (71) Applicant: Arconic Technologies LLC Pittsburgh, PA 15212-5858 (US)	(72) Inventors: MYDLAND, Brent L. Gibsonia, PA 15044 (US) KRUZYNSKI, Gregg E. Greensburg, PA 15061 (US) THORNBURGH, Anthony L. Knoxville, TN 37922 (US) WILLIAMS, Edward M. Apollo, PA 15613 (US) (74) Representative: Forresters IP LLP  Skygarden Erika-Mann-Straße 11 80636 München 80636 München (DE)