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EP 2 971 213 A1

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(43) Date of publication: 20.01.2016 Bulletin 2016/03 (21) Application number: 14775660.5 (22) Date of filing: 11.03.2014

(51) International Patent Classification (IPC):  C22F 1/04(2006.01) C22F 1/053(2006.01) C22C 21/08(2006.01) C22F 1/047(2006.01) C22C 21/00(2006.01) C22C 21/10(2006.01) (86) International application number: PCT/US2014/023032 (87) International publication number: WO 2014/159324 (02.10.2014 Gazette 2014/40)

(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 (30) Priority: 14.03.2013 US 201313828571 (71) Applicant: Alcoa Inc. Pittsburgh, PA 15212-5858 (US)	(72) Inventors: BOVARD, Francine Monroeville, PA 15146 (US) RIOJA, Roberto, J. Murrysville, PA 15668 (US) SAWTELL, Ralph, R. Gibsonia, PA 15044 (US) MOOY, Dirk, C. Bettendorf, IA 52722 (US) (74) Representative: Lenzing Gerber Stute  Partnerschaft von Patentanwälten mbB Bahnstraße 9 40212 Düsseldorf 40212 Düsseldorf (DE)