Nov 25, 2025

US12480192 - Thick Al—Mg alloy rolled product suitable for armor plate applications

The disclosure relates to an aluminum alloy plate having a final thickness of 3 inch or more, and a method for manufacturing same. In the method, an aluminum alloy with a chemical composition of in weight percent: Mg 4.0 to 5.2, Mn 0.4 to 1.0, Zn≤0.3, Zr≤0.3, Cr≤0.3, Ti≤0.3, Fe<0.50, Si<0.45, Cu<0.25, other elements and unavoidable impurities each <0.05 total <0.20 balance aluminum, is cast, preheated and/or homogenized, hot rolled, cold rolled with a cold rolling reduction of 3 to 10%, and stretched directly after cold rolling with a permanent elongation of 0.7 to 5% in the direction of stretching.

Inventors: Jack Franklin, Dale Baumgartner, Michael Philbrook, Denise Brandt, Timothy Jackson
Filing date: 2022-04-13

The patent describes a method for manufacturing a thick aluminum alloy plate suitable for armor applications, with a final thickness of 3 inches or more. The process involves casting, preheating, hot rolling, cold rolling with a specific reduction, and stretching the alloy to achieve desired mechanical properties.

Claim 1

1 . A method of manufacturing an aluminum alloy plate having a final thickness of 3 inch or more, the method comprising successively: (a) casting an aluminum alloy having a chemical composition comprising, in weight percent: Mg 4.0 to 5.2 Mn 0.4 to 1.0 Zn≤0.3 Zr≤0.3 Cr≤0.3 Ti≤0.3 Fe<0.50 Si<0.45 Cu<0.25 other elements and unavoidable impurities each <0.05 total <0.20 balance aluminum, wherein the sum of Mg and Mn content is from 4.70 to 5.50 wt. %, (b) preheating and/or homogenization, (c) hot rolling, (d) cold rolling with a cold rolling reduction of 3 to 10%, (e) stretching directly after cold rolling with a permanent elongation of 0.7 to 5% in the direction of stretching. (a) casting an aluminum alloy having a chemical composition comprising, in weight percent: Mg 4.0 to 5.2 Mn 0.4 to 1.0 Zn≤0.3 Zr≤0.3 Cr≤0.3 Ti≤0.3 Fe<0.50 Si<0.45 Cu<0.25 other elements and unavoidable impurities each <0.05 total <0.20 balance aluminum, wherein the sum of Mg and Mn content is from 4.70 to 5.50 wt. %, Mg 4.0 to 5.2 Mn 0.4 to 1.0 Zn≤0.3 Zr≤0.3 Cr≤0.3 Ti≤0.3 Fe<0.50 Si<0.45 Cu<0.25 other elements and unavoidable impurities each <0.05 total <0.20 balance aluminum, wherein the sum of Mg and Mn content is from 4.70 to 5.50 wt. %, (b) preheating and/or homogenization, (c) hot rolling, (d) cold rolling with a cold rolling reduction of 3 to 10%, (e) stretching directly after cold rolling with a permanent elongation of 0.7 to 5% in the direction of stretching.

Google Patents

https://patents.google.com/patent/US12480192

USPTO PDF

https://image-ppubs.uspto.gov/dirsearch-public/print/downloadPdf/12480192