公开(公告)号：US20240175114A1

公开(公告)日：2024-05-30

申请号：US18435464

申请日：2024-02-07

Applicant: ARCONIC TECHNOLOGIES LLC

Inventor： Daniel J. Sauza ,  Julien Boselli

IPC: C22F1/057 ,  C22C21/14 ,  C22C21/16 ,  C22C21/18

CPC classification number: C22F1/057 ,  C22C21/14 ,  C22C21/16 ,  C22C21/18

Abstract: Methods of making new 2xxx aluminum alloy sheet products are disclosed. In one approach, a method comprises artificially aging a 2xxx aluminum alloy in at least two-steps. In one embodiment, the first aging step comprises first aging a 2xxx aluminum alloy at a first temperature of from 300° F. to 450ºF and for a first aging time of from 4 to 120 hours, and second aging the 2xxx aluminum alloy at a second temperature for a second aging time of from 30 minutes to 120 hours, wherein the second temperature is from 20° F. to 150° F. lower than the first temperature. The new two-step artificial aging step may facilitate an improved combination of properties, such as an improved combination of two or more of strength, ductility, fracture toughness, and corrosion resistance.