公开(公告)号：US20250066883A1

公开(公告)日：2025-02-27

申请号：US18940036

申请日：2024-11-07

Applicant: ARCONIC TECHNOLOGIES LLC

Inventor： Steve R. Claves ,  Gregory B. Venema ,  Wei Wen ,  Kimberly Maciejewski

IPC: C22C21/10 ,  C22F1/053

Abstract: New 7xxx aluminum alloys are disclosed. The new 7xxx aluminum alloys may comprise from 5-10 wt. % Zn, 1-3 wt. % Mg, 1-3 wt. % Cu, a thickness of at least 2 inches, from 10% to 40% recrystallized grains, and an average grain size of at least 300 micrometers. The new 7xxx aluminum alloys may have recrystallized areas and the ratio of intercept distances for the recrystallized areas to the average to grain size may be from 0.5 and 2.0. In some embodiments, at least some recrystallized grains are located on a periphery of unrecrystallized grains. The recrystallized grains may be achieved at least partially due to (i) the use of not greater than 0.11 wt. % Zr in the 7xxx aluminum alloy product, (ii) particle stimulated nucleation, or (iii) both.