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Unformatted text preview: hery arrows, and it
remains to be established how widespread the use of
these alloys will become. As the construction techniques
of the advanced trains become more akin to aerospace
technology, it could well be that the scandium modiﬁed
7xxx alloy could provide some signiﬁcant system
advantage. For example, a higher strength extrusion
(due to the addition of a scandium-containing alloy)
when used to build a total assembly might enable certain
design improvements such as the need for less material
resulting in a lighter, more fuel efﬁcient system.
Friction 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 con...
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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