公开(公告)号：US20220145439A1

公开(公告)日：2022-05-12

申请号：US17479211

申请日：2021-09-20

Applicant: Kaiser Aluminum Fabricated Products, LLC

Inventor： Zhengdong Long ,  Philippe Paul Gomiero ,  Ravi Rastogi ,  Haoyan Diao ,  Jason N. Scheuring

IPC: C22F1/053 ,  C22C21/10

Abstract: High strength and high fracture toughness 7xxx aluminum alloy products comprise 6.5 to 7.2 wt. % Zn, 1.55 to 1.95 wt. % Cu, 1.75 to 2.15 wt. % Mg, 0.095 to 0.15 wt. % Zr, incidental elements, and the balance Al. In one embodiment, the aluminum alloy product includes Mg/Cu and Zn/Mg ratios in the range of 1.05 to 1.35, and 3.2 to 4.0, respectively. This aluminum alloy product can be fabricated to produce plate, extrusion or forging products, and is especially suitable for aerospace structural components. The products have an excellent combination of strength, fracture toughness, Kmax at the fatigue crack deviation point, ductility in different orientations, and corrosion resistance suitable for aerospace application.