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The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.

The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.

Patent No.:

US 11649529 B1

PDFFull Text
Date of Patent:
May. 16, 2023

Filed:

Oct. 23, 2018

Aluminum alloy products exhibiting improved bond durability and methods of making the same

Applicant:

Novelis Inc., Atlanta, GA (US);

Inventors:

Liangliang Li, Atlanta, GA (US);

Theresa Elizabeth MacFarlane, Woodstock, GA (US);

Sazol Kumar Das, Acworth, GA (US);

Peter Lloyd Redmond, Acworth, GA (US);

Changook Son, Marietta, GA (US);

Dewei Zhu, Marietta, GA (US);

Yudie Yuan, Roswell, GA (US);

Luis Fanor Vega, Woodstock, GA (US);

Milan Felberbaum, Lausanne, CH;

Julio Malpica, Canton, GA (US);

Brian Paradis, Kennesaw, GA (US);

Alp Manavbasi, Kennesaw, GA (US);

Dechao Lin, Kennesaw, GA (US);

Assignee:

NOVELIS INC., Atlanta, GA (US);

Attorney:

Kilpatrick Townsend & Stockton LLP

Primary Examiner:

Keith Walker

Assistant Examiner:

Benjamin C Anderson

Int. Cl.
CPC ...
C22C 21/00 (2006.01); B23K 11/11 (2006.01); C23F 1/00 (2006.01); C23F 1/20 (2006.01); C23F 17/00 (2006.01); C22F 1/047 (2006.01); B21B 1/46 (2006.01); C22C 21/12 (2006.01); C22C 21/02 (2006.01); C22F 1/043 (2006.01); C22F 1/053 (2006.01); B23K 103/10 (2006.01); C22C 21/08 (2006.01);
U.S. Cl.
CPC ...
C22C 21/00 (2013.01); B21B 1/46 (2013.01); B23K 11/11 (2013.01); C22C 21/02 (2013.01); C22C 21/12 (2013.01); C22F 1/043 (2013.01); C22F 1/047 (2013.01); C22F 1/053 (2013.01); C23F 1/00 (2013.01); C23F 1/20 (2013.01); C23F 17/00 (2013.01); B23K 2103/10 (2018.08); C22C 21/08 (2013.01);
Abstract

Disclosed are aluminum alloy products and methods of making and processing such products. Thus, disclosed are aluminum alloy products exhibiting controllable surface properties, including excellent bond durability, low contact resistance, and corrosion resistance. Aluminum alloy products described herein include a migrant element, a subsurface portion having a concentration of the migrant element, and a bulk portion having a concentration of the migrant element. The aluminum alloy product comprises an enrichment ratio of 4.0 or less, wherein the enrichment ratio is a ratio of the migrant element concentration in the subsurface portion to the concentration in the bulk portion. Additionally, the aluminum alloy products surface and/or subsurface can contain phosphorus (e.g., elemental phosphorus or oxidized phosphorus). The phosphorus containing surface provides reduced electronic stress on an electrode tip of a resistance spot welding apparatus, and an extended service lifetime (e.g., weld cycles to failure) of the electrode tip.

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