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.:
Date of Patent:
Jul. 27, 2010
Filed:
Apr. 12, 2007
Michael J. Bull, Brighton, MI (US);
David J. Lloyd, Bath, CA;
Phil Morris, Bath, CA;
Paul A. Wycliffe, Kingston, CA;
Robert Bruce Wagstaff, Green Acres, WA (US);
Alok K. Gupta, Kingston, CA;
Gijsbertus Langelaan, Kingston, CA;
Michael J. Bull, Brighton, MI (US);
David J. Lloyd, Bath, CA;
Phil Morris, Bath, CA;
Paul A. Wycliffe, Kingston, CA;
Robert Bruce Wagstaff, Green Acres, WA (US);
Alok K. Gupta, Kingston, CA;
Gijsbertus Langelaan, Kingston, CA;
Novelis Inc., Toronto, CA;
Abstract
A method of producing a clad sheet article having superplastic properties, and the resulting clad sheet article. The method involves producing a cladding layer onto at least one rolling face of a core ingot made of a metal having superplastic properties, preferably by co-casting, to form a clad ingot and then rolling said clad ingot to produce a sheet article. The core ingot includes an element that diffuses from an interior of the ingot to a surface at superplastic forming temperatures thereby deteriorating surface properties of the ingot. The cladding layer is provided with an element (dopant) that reacts with the element of the core to reduce the ability of the element to diffuse through the cladding layer.