NASA NTRS · 20080009745
Friction Stir Weld Tools
Abstract
A friction stir weld tool sleeve is supported by an underlying support pin. The pin material is preferably selected for toughness and fracture characteristics. The pin sleeve preferably has a geometry which employs the use of an interrupted thread, a plurality of flutes and/or eccentric path to provide greater flow through. Paddles have been found to assist in imparting friction and directing plastic metal during the welding process.
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Carter, Robert W., Payton, Lewis N.. 2007-10-07. Friction Stir Weld Tools. https://ntrs.nasa.gov/citations/20080009745
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