	US 12,104,237 B2
	Ultra-strong aluminum alloys for ambient and high-temperature applications
Amir Rezaei Farkoosh, Evanston, IL (US); David C. Dunand, Evanston, IL (US); and David N. Seidman, Evanston, IL (US)
Assigned to NORTHWESTERN UNIVERSITY, Evanston, IL (US)
Filed by NORTHWESTERN UNIVERSITY, Evanston, IL (US)
Filed on Feb. 14, 2022, as Appl. No. 17/670,883.
Claims priority of provisional application 63/150,149, filed on Feb. 17, 2021.
Prior Publication US 2022/0267884 A1, Aug. 25, 2022
Int. Cl. C22F 1/04 (2006.01); B22D 7/00 (2006.01); C22C 1/02 (2006.01); C22C 21/00 (2006.01)

CPC C22F 1/04 (2013.01) [B22D 7/005 (2013.01); C22C 1/026 (2013.01); C22C 21/00 (2013.01)]

9 Claims

1. An aluminum alloy, comprising:

aluminum (Al), manganese (Mn), silicon (Si), a first composition comprising one or more of tin (Sn), indium (In), antimony (Sb) and bismuth (Bi), and a second composition comprising titanium (Ti) and/or vanadium (V), and

an impurity-level concentration of iron (Fe) that is about 0.004-0.01 at. % of said aluminum alloy,

wherein aluminum alloy is formed by

providing a first molten mass of aluminum held at a first temperature;

adding one or more of tin, antimony, indium, bismuth, and a series of master alloys sequentially to the first molten mass with a holding time between each addition to produce a second molten mass, wherein the series of master alloys comprises Al-10Mn and Al-12Si (at. %), and wherein the Al-10Mn master alloy is preheated at a second temperature; and

maintaining the second molten mass at the first temperature for a period of time, periodically stirring and then casting the second molten mass into a mold to form an ingot, wherein the mold is preheated at a third temperature, and placed on an ice-cooled copper platen immediately prior to casting, to enhance directional solidification.