corroded product in aluminum alloy - magnesium - lithium

摘要

the invention? refers to an aluminum alloy corroded product of composition, by weight percent, mg: 4.0? 5.0; li: 1.0 -1.8; mn: 0.3? 0.5; zr: 0.05? 0.15; ag: 0.5; fe: 0.1; ti: 0.15; si: 0.05; other elements 0,05 each and 0,15 in association rest aluminum. The invention relates to a process for the manufacture of such corroded product, in which an aluminum alloy crude form of composition is melted in percent by weight: mg: 4.0; 5.0; li: 1.0 -1.8; mn: 0.3? 0.5; zr: 0.05? 0.15; ag: 0.5; fe: 0.1; ti: 0.15; si: 0.05; other elements 0,05 each and 0,15 in association rest aluminum optionally homogenize this crude form,? this raw form is hot deformed to obtain a hot deformed product; optionally, this hot deformed product is placed in solution at a temperature of 360 to 460, preferably from 380 to 420, for 15 minutes to 8 hours; this hot deformed product is immersed; optionally, a correction is made of this deformed and tempered product; optionally cold deforming the product deformed in a controlled manner to obtain a permanent cold deformation of 1 to 10%, preferably 2 to 6%, more preferably 3 to 5%; A tempering of this deformed and tempered product is made. The invention also relates to the use of such corroded product to make aircraft frame elements.