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Trending Now. Answers. Best Answer: Buttering is the addition of material, by welding, on one or both faces of a joint, prior to the preparation of the joint for final welding, for the purpose of providing a suitable transition weld deposit for the subsequent completion of the joint.
Friction Stir Welding (FSW) is a solid state welding process invented at TWI (The Welding Institute), UK in 1991. Friction Stir Welding is a solid-state process, which implies that the workpieces are joined without arriving at the melting point. This opens up entirely new ranges in welding innovation. Friction Stir Welding can be utilized to weld aluminum sheets