公开(公告)号：US11472532B2

公开(公告)日：2022-10-18

申请号：US14899743

申请日：2014-06-18

Applicant: CONSTELLIUM ISSOIRE

Inventor： Armelle Danielou ,  Gaelle Pouget ,  Christophe Sigli

IPC: B64C3/26 ,  C22F1/057 ,  C22C21/12 ,  B22D21/00 ,  C21D1/30 ,  C21D8/00 ,  C22C1/02 ,  C22C21/14 ,  C22C21/16

Abstract: Extrados structural element made from an aluminum, copper and lithium alloy and method for manufacturing same. An alloy with composition (in wt %) 4.2-5.2 Cu, 0.9-1.2 Li, 0.1-0.3 Ag, 0.1-0.25 Mg, 0.08-0.18 Zr, 0.01-0.15 Ti, an Fe and Si content level less than or equal to 0.1% each, and other element with content level less than or equal to 0.05% each and 0.15% in total, is poured, homogenized, deformed hot, placed in a solution at a temperature of at least 515° C., pulled from 0.5 to 5% and annealed. The combination of magnesium, copper and manganese content with the temperature in solution can reach an advantageous elasticity under compression limit. Products having a thickness of at least 12 mm have, in the longitudinal direction, an elasticity under compression limit of at least 645 MPa and an elongation of at least 7%.