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:
Nov. 13, 1990
Filed:
Jul. 20, 1988
Applicant:
Inventors:
James R Kennedy, Huntington, NY (US);
Edmund Y Ting, Flushing, NY (US);
Assignee:
Grumman Aerospace Corporation, Bethpage, NY (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B23K / ;
U.S. Cl.
CPC ...
228193 ; 148 / ;
Abstract
Diffusion bonding of aluminum alloy objects of different sizes and shapes may be greatly improved when the surface of the object is exposed to a mechanical deformation cycle which forms a cold-worked surface microstructure, followed by a heat treatment cycle to produce recrystallization of the surface layer. The method of the invention results in the formation of finer grains at the surface which enhances the strength of a diffusion bond.