Friction stir welding tool and process for welding dissimilar materials
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United States of America Patent
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May 7, 2013
Grant Date -
Nov 1, 2012
app pub date -
Jun 14, 2012
filing date -
Jun 18, 2010
priority date (Note) -
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status (Latency Note)
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Abstract
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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