公开(公告)号：US20200165707A1

公开(公告)日：2020-05-28

申请号：US16619419

申请日：2018-06-05

Applicant: CONSTELLIUM ISSOIRE

Inventor： Ricky WHELCHEL ,  Mathieu REVIL-BAUDARD ,  Philippe JARRY ,  Bernard BES ,  Fanny MAS

IPC: C22C21/18 ,  C22C21/16 ,  C22F1/057

Abstract: An aluminium alloy comprising lithium with improved mechanical strength and toughness. The invention relates to a 2XXX wrought alloy product comprising from 0.05 to 1.9% by weight of Li and from 0.005 to 0.045% by weight of Cr and/or of V. The invention also relates to an as-cast 2XXX alloy product comprising from 0.05 to 1.9% by weight of Li and from 0.005 to 0.045% by weight of Cr and/or of V. Finally, the invention relates to an aircraft structure element, preferably a lower surface or upper surface element, the skin and stiffeners of which originate from the same starting material, a spar or a rib, comprising a wrought product.