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(11)

EP 3 445 888 A1

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(43) Date of publication: 27.02.2019 Bulletin 2019/09 (21) Application number: 17786791.8 (22) Date of filing: 24.04.2017

(51) International Patent Classification (IPC):  C22F 1/18(2006.01) B21B 3/00(2006.01) B21B 1/092(2006.01) (86) International application number: PCT/US2017/029064 (87) International publication number: WO 2017/185079 (26.10.2017 Gazette 2017/43)

(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: MA MD (30) Priority: 22.04.2016 US 201662326243 P (71) Applicant: Arconic Inc. Pittsburgh, PA 15212-5858 (US)	(72) Inventors: STROUD, Adam Rosharon Texas 77583 (US) LI, Dongjian Canfield Ohio 44406 (US) (74) Representative: Barton, Matthew Thomas  Forresters IP LLP Skygarden Erika-Mann-Strasse 11 80636 München 80636 München (DE)