Processing of small scale Nitinol billets by induction heated nonconventional isothermal extrusion (IHNCIE)

J. Butler; P. Tiernan; A. A. Gandhi; S. Beloshapkin; S. A.M. Tofail

doi:10.1115/1.4003108

Processing of small scale Nitinol billets by induction heated nonconventional isothermal extrusion (IHNCIE)

J. Butler, P. Tiernan, A. A. Gandhi, S. Beloshapkin, S. A.M. Tofail

University of Limerick

Research output: Contribution to journal › Article › peer-review

Abstract

This paper describes a novel process designed specifically for extruding small scale billets, between 850°C and 950°C, 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 2 μm without a recrystallization anneal. Our method offers an alternative route for the production of small scale billets into a wire.

Original language	English
Article number	021009
Journal	Journal of Engineering Materials and Technology
Volume	133
Issue number	2
DOIs	https://doi.org/10.1115/1.4003108
Publication status	Published - 2011

Keywords

extrusion
induction
NiTi
rolling

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10.1115/1.4003108

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abstract = "This paper describes a novel process designed specifically for extruding small scale billets, between 850°C and 950°C, 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 2 μm without a recrystallization anneal. Our method offers an alternative route for the production of small scale billets into a wire.",

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AU - Tiernan, P.

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AU - Beloshapkin, S.

AU - Tofail, S. A.M.

PY - 2011

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AB - This paper describes a novel process designed specifically for extruding small scale billets, between 850°C and 950°C, 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 2 μm without a recrystallization anneal. Our method offers an alternative route for the production of small scale billets into a wire.

KW - extrusion

KW - induction

KW - NiTi

KW - rolling

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Processing of small scale Nitinol billets by induction heated nonconventional isothermal extrusion (IHNCIE)

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Keywords

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