Unformatted text preview: ductivity, 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 possible. Figure 7. Schematic of Friction Stir Welding. While FSW is being developed for other metals as well,
its application for aluminum has been most dominant.
One reason for this is that tooling costs are relatively low
for aluminum. The relatively low melting temperature
of aluminum (~660°C) as compared to steel (~1,500°C)
for example, ensures that the wear of the spinning tool
and the forces required for the welding process are much
For the fabrication of rail and passenger cars, FSW
is an ideal proc...
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This note was uploaded on 01/27/2014 for the course CM 312 taught by Professor Mariowriedt during the Spring '10 term at Clarkson University .
- Spring '10