Brian S Paradis

US Patent:

20190193185, Jun 27, 2019

Filed:

Oct 23, 2018

Appl. No.:

16/168016

Inventors:

- 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

International Classification:

B23K 11/11
C23F 1/00
C23F 1/20
C22F 1/047
C23F 17/00

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.

US Patent:

20190047075, Feb 14, 2019

Filed:

Aug 13, 2018

Appl. No.:

16/101589

Inventors:

- Atlanta GA, US
Brian Paradis - Kennesaw GA, US
Louis Mitchell Nazro - Canton GA, US
Julio Malpica - Canton GA, US
Rainer Kossak - South Lyon MI, US
Samuel Robert Wagstaff - Marietta GA, US
Xiao Chai - San Jose CA, US
Patrick Lester - Atlanta GA, US
Dechao Lin - Kennesaw GA, US

Assignee:

Novelis Inc. - Atlanta GA

International Classification:

B23K 11/11
B23K 11/31

Abstract:

Disclosed are welds formed from improved resistance spot welding, as well as methods of improved resistance spot welding. Resistance spot welding includes positioning a magnet carrier having a plurality of electromagnets on at least one electrode of two electrodes. The method includes positioning a first metal sheet and a second metal sheet between the two electrodes where at least one of the first metal sheet or the second metal sheet includes an aluminum alloy. The method includes positioning the forming a weld nugget by applying a magnetic field from the plurality of electromagnets through the weld while applying a current through the electrodes to stir a portion of the first metal sheet and the second metal sheet forming a weld nugget and adjusting the magnetic field to control at least one characteristic of the weld nugget. Forming the weld nugget joins the first metal sheet with the second metal sheet.