公开(公告)号：WO2021242772A1

公开(公告)日：2021-12-02

申请号：PCT/US2021/034082

申请日：2021-05-25

Applicant: ARCONIC TECHNOLOGIES LLC

Inventor： BAE, Douglas S. ,  BERUBE, Patrick ,  LIN, Jen C.

IPC: C22C21/02 ,  C22C21/10 ,  C22F1/043 ,  C22F1/053

Abstract: New aluminum alloys having an improved combination of properties are disclosed. In one approach, a new aluminum alloys may include from 0.50 to 3.0 wt. % of X, wherein X comprises (wt. % Bi + wt. % Sn), from 0.50 to 4.0 wt. % Si, from 0.30 to 2.5 wt. % Mg, up to 1.5 wt. % Cu, up to 2.0 wt. % Zn, from 0.05 to 1.5 wt. % Mn, up to 0.70 wt. % Fe, up to 0.35 wt. % of Cr, up to 0.25 wt. % each of Zr and V, and up to 0.15 wt. % Ti, the balance being aluminum, incidental elements and impurities. The new aluminum alloys may comprise at least 0.20 wt. % excess silicon. The new aluminum alloys may comprise high amounts of strengthening precipitates, such as at least 1.75 mol. % of Y, wherein Y is (mol. % Q-phase + mol. % Al2Cu + mol. % Mg2Si) as calculated using PANDAT and a temperature of 340F.