Developments in fsw especially have been most

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Unformatted text preview: n Stir Welding: As pointed out in the “Aluminum Industry Technology Roadmap,”17 the technology of aluminum joining has advanced rapidly in recent years. Developments in FSW especially have been most significant and have provided aluminum with a significant competitive advantage in some markets (Figure 7). Since its inception in the early 1990s, FSW has advanced most rapidly with aluminum due to its combination of low melting point, high thermal conductivity, and ductility and is now being used on the external tank of the Space Shuttle and the Eclipse business jet. FSW has enabled the joining of previously difficult to weld alloys, often with improved mechanical properties and corrosion resistance. Experience with FSW in the fabrication of fast ferries and bridge decks indicates that the process has increased automation, improved dimensional tolerances, reduced residual stresses, and lowered manpower needs. The process is especially advantageous in the fabrication of long butt welds, but welding along curves and around cylinders is now also...
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