Manufacturing Industry

Shape memory & superelastic technologies and ASM form new relationship.(ASM NEWS)

Advanced Materials & Processes, January, 2005 by Duerig, Thomas W.

Bend it around your finger or twist it like a pretzel--a strand of Nitinol wire might seem like any other wire. But try this. Place the twisted Nitinol into a cup of hot water--watch it change into the shape it previously formed into! Whatever shape the wire has memorized (by previously constraining the wire into a particular shape and then performing a heat treatment) is the shape the wire will return to when exposed to a predetermined temperature.

Shape memory and superelastic alloys like Nitinol (nickel-titanium) are amazing materials particularly important to the medical devices industry, where they are used in applications including eyeglass frames, cardiovascular stents and neurosurgery instruments. This unique class of materials is the focus of the...

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