Friction stir welding tool and process for welding dissimilar materials

Hovanski, Yuri; Grant, Glenn J; Jana, Saumyadeep; Mattlin, Karl F

Title: Friction stir welding tool and process for welding dissimilar materials

Patent · Tue May 07 00:00:00 EDT 2013

OSTI ID:1084244

Hovanski, Yuri; Grant, Glenn J; Jana, Saumyadeep; Mattlin, Karl F

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.

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Research Organization:: Pacific Northwest National Laboratory (PNNL), Richland, WA (United States)

Sponsoring Organization:: USDOE

DOE Contract Number:: AC05-76RLO1830

Assignee:: Battelle Memorial Institute (Richland, WA)

Patent Number(s):: 8,434,661

Application Number:: 13/523,112

OSTI ID:: 1084244

Country of Publication:: United States

Language:: English

References (10)

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Multi-shouldered fixed bobbin tools for simultaneous friction stir welding of multiple parallel walls between parts Stol, Israel; Cobes, John W. https://doi.org/https://image-ppubs.uspto.gov/dirsearch-public/print/downloadPdf/7198189 US Patent Document 7,198,189	patent	April 2007
Effect of tool geometry on microstructure and mechanical properties of friction stir lap welded magnesium alloy and steel Chen, Y. C.; Nakata, K. Materials & Design, Vol. 30, Issue 9 https://doi.org/10.1016/j.matdes.2009.03.007	journal	October 2009
Friction stir welding tool for welding variable thickness workpieces Colligan, Kevin https://doi.org/https://image-ppubs.uspto.gov/dirsearch-public/print/downloadPdf/5718366 US Patent Document 5,718,366	patent	February 1998
Friction Stir Lap Welding of Magnesium Alloy and Zinc-Coated Steel Chen, Y. C.; Nakata, K. MATERIALS TRANSACTIONS, Vol. 50, Issue 11 https://doi.org/10.2320/matertrans.M2009022	journal	January 2009
Microstructures and mechanical properties of magnesium alloy and stainless steel weld-joint made by friction stir lap welding Wei, Yanni; Li, Jinglong; Xiong, Jiangtao Materials & Design, Vol. 33 https://doi.org/10.1016/j.matdes.2011.07.016	journal	January 2012
Advanced friction stir welding tools Stol, Israel; Cobes, John W. https://doi.org/https://image-ppubs.uspto.gov/dirsearch-public/print/downloadPdf/7401723 US Patent Document 7,401,723	patent	July 2008
Friction Stir Lap Welding of Magnesium Alloy to Steel: A Preliminary Investigation Jana, S.; Hovanski, Y.; Grant, G. J. Metallurgical and Materials Transactions A, Vol. 41, Issue 12 https://doi.org/10.1007/s11661-010-0399-8	journal	September 2010
Toward optimum friction stir welding tool shoulder diameter Arora, A.; De, A.; DebRoy, T. Scripta Materialia, Vol. 64, Issue 1 https://doi.org/10.1016/j.scriptamat.2010.08.052	journal	January 2011
System and associated friction stir welding (FSW) assembly, controller and method for performing a friction stir welding operation Burford, Dwight A.; Fenn, Edwin H.; High, Danny R. https://doi.org/https://image-ppubs.uspto.gov/dirsearch-public/print/downloadPdf/7255258 US Patent Document 7,255,258	patent	August 2007

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