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Friction stir welding tool and process for welding dissimilar materials

United States Patent

May 7, 2013
View the Complete Patent at the US Patent & Trademark Office
Pacific Northwest National Laboratory - Visit the Technology Commercialization Program Website
A friction stir welding tool and process for lap welding dissimilar materials are detailed. The invention includes a cutter scribe that penetrates and extrudes a first material of a lap weld stack to a preselected depth and further cuts a second material to provide a beneficial geometry defined by a plurality of mechanically interlocking features. The tool backfills the interlocking features generating a lap weld across the length of the interface between the dissimilar materials that enhances the shear strength of the lap weld.
Hovanski; Yuri (West Richland, WA), Grant; Glenn J. (Benton City, WA), Jana; Saumyadeep (Richland, WA), Mattlin; Karl F. (Richland, WA)
Battelle Memorial Institute (Richland, WA)
13/ 523,112
June 14, 2012
STATEMENT REGARDING RIGHTS TO INVENTION MADE UNDER FEDERALLY-SPONSORED RESEARCH AND DEVELOPMENT This invention was made with Government support under Contract DE-AC05-76RLO1830 awarded by the U.S. Department of Energy. The Government has certain rights in the invention.