Unformatted text preview: 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 process for the butt welding of the lengthy
longitudinal extruded sections that comprise the roof
and ﬂoor sections of the cars. The fact that the technology
enables the joining of some alloys that traditionally
have been difﬁcult to weld, e.g. most 2xxx and 7xxx
11 alloys, provides a further competitive advantage. As the
fabrication techniques for the advanced trains become
like those of the aerospace industry and if history there is
any guide, the application of FSW to the rail industry will
improve the welding of rail cars, automate the process,
and lower overall costs. A recent study at the South
Dakota School of M...
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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