US 12,410,499 B2
Aluminum alloy products and a method of preparation
Michael Bull, Brighton, MI (US); and Rajeev G. Kamat, Marietta, GA (US)
Assigned to Novelis Inc., Atlanta, GA (US)
Filed by Novelis Inc., Atlanta, GA (US)
Filed on Oct. 13, 2021, as Appl. No. 17/450,796.
Application 17/450,796 is a continuation of application No. 14/924,956, filed on Oct. 28, 2015, granted, now 11,193,192.
Claims priority of provisional application 62/069,569, filed on Oct. 28, 2014.
Prior Publication US 2022/0033947 A1, Feb. 3, 2022
Int. Cl. C22F 1/043 (2006.01); B22D 7/00 (2006.01); B22D 15/00 (2006.01); B22D 21/00 (2006.01); C22C 21/02 (2006.01); C22C 21/08 (2006.01); C22C 21/14 (2006.01); C22C 21/16 (2006.01); C22F 1/047 (2006.01); C22F 1/05 (2006.01); C22F 1/057 (2006.01)
CPC C22F 1/043 (2013.01) [B22D 7/005 (2013.01); B22D 15/00 (2013.01); B22D 21/007 (2013.01); C22C 21/02 (2013.01); C22C 21/08 (2013.01); C22C 21/14 (2013.01); C22C 21/16 (2013.01); C22F 1/047 (2013.01); C22F 1/05 (2013.01); C22F 1/057 (2013.01)] 16 Claims
OG exemplary drawing
 
1. A method of producing a metal sheet, comprising:
casting an aluminum alloy to form an ingot, wherein the aluminum alloy comprises Cu 0.40-0.80 wt. %, Fe 0-0.40 wt. %, Mg 0.40-0.90 wt. %, Mn 0-0.40 wt. %, Si 0.40-0.7 wt. %, Cr 0-0.2 wt. %, Zn 0-0.1 wt. % and Ti 0-0.20 wt. % with trace element impurities 0.10 wt. % maximum, and Al;
homogenizing the ingot;
hot rolling the ingot to produce a hot band;
cold rolling the hot band to produce a sheet having a final gauge thickness;
solution heat treating the sheet at a solution heat treatment temperature from 450° C. to 575° C.;
quenching the sheet following solution heat treatment; and
reheating the sheet;
wherein the sheet comprises from −0.30 wt. % to 0.10 wt. % excess Si for forming Mg2Si;
wherein the sheet has a yield strength of at least 300 MPa and an r/t bendability ratio of 0.8 or less.