Search International and National Patent Collections

1. (WO2016051099) ISOTROPIC ALUMINIUM-COPPER-LITHIUM ALLOY SHEETS FOR PRODUCING AEROPLANE FUSELAGES

Pub. No.:    WO/2016/051099    International Application No.:    PCT/FR2015/052634
Publication Date: Fri Apr 08 01:59:59 CEST 2016 International Filing Date: Fri Oct 02 01:59:59 CEST 2015
IPC: C22C 21/16
C22F 1/057
Applicants: CONSTELLIUM ISSOIRE
Inventors: CHEVY, Juliette
BES, Bernard
EHRSTROM, Jean-Christophe
EBERL, Frank
Title: ISOTROPIC ALUMINIUM-COPPER-LITHIUM ALLOY SHEETS FOR PRODUCING AEROPLANE FUSELAGES
Abstract:
The invention concerns a sheet 0.5 to 9 mm thick, having an essentially recrystallised granular structure made from an aluminium alloy comprising 2.8 to 3.2 % by weight of Cu, 0.5 to 0.8 % by weight of Li, 0.1 to 0.3 % by weight of Ag, 0.2 to 0.7 % by weight of Mg, 0.2 to 0.6 % by weight of Mn, 0.01 to 0.15 % by weight of Ti, a quantity of Zn of less than 0.2 % by weight, a quantity of Fe and of Si of less than 0.1 % each by weight, and inevitable impurities in a content less than or equal to 0.05% each by weight and 0.15% in total by weight, said sheet being obtained by a method comprising pouring, soaking, hot rolling and optionally cold rolling, solution annealing, quenching and tempering. The sheets according to the invention are particularly advantageous for producing aircraft fuselage panels.