Friction Stir Welding

Friction Stir Welding

Friction-stir welding (FSW) is a solid-state joining process (the metal is not melted) and is used when the original metal characteristics must remain unchanged as much as possible. It mechanically intermixes the two pieces of metal at the place of the join, then softens them so the metal can be fused using mechanical pressure, much like joining clay, dough, or plasticine. It is primarily used on aluminium, and most often on large pieces that cannot be easily heat-treated after welding to recover temper characteristics.

It was invented and experimentally proven at The Welding Institute UK in December 1991. TWI holds patents on the process, the first being the most descriptive.

Read more about Friction Stir WeldingPrinciple of Operation, Microstructural Features, Advantages and Limitations, Welding Forces, Flow of Material, Generation and Flow of Heat, Applications, Friction Stir Welding Experts

Other articles related to "friction stir welding, welding":

Manufacturing Engineering - Frontiers of Research - Friction Stir Welding
... Friction stir welding was discovered in 1991 by The Welding Institute (TWI) ... This innovative steady state (non-fusion) welding technique joins previously un-weldable materials, including several aluminum alloys ... Current uses of this technology to date include welding the seams of the aluminum main space shuttle external tank, the Orion Crew Vehicle test article, Boeing Delta II and ...

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