One reason for this is that tooling costs are

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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 reduced. 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 .

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