This paper describes a novel process designed specifically for extruding small scale billets, between and , in very short cycle times of 10 min. Induction heated nonconventional isothermal extrusion (IHNCIE) is used to produce wires of Nitinol and compare its efficacy with wires produced conventionally by hot rolling. With two four to one area reductions, a wire of 3 mm diameter was formed by IHNCIE. The extruded wires showed good superelastic tensile properties. This 3 mm diameter extruded wire exhibited a microstructure with grains of approximately without a recrystallization anneal. Our method offers an alternative route for the production of small scale billets into a wire.
Issue Section:
Research Papers
Keywords:
NiTi,
extrusion,
induction,
rolling,
billets,
elasticity,
extrusion,
nickel alloys,
tensile strength,
titanium alloys,
wires
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.Copyright © 2011
by American Society of Mechanical Engineers
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