Temperature profiles in a Ti-45Ni-5Cu (at%) shape memory alloy developed by the Joule heating

Seung yong Yang; Seok won Kang; Yeon Min Lim; Yun jung Lee; Jae il Kim; Tae hyun Nam

doi:10.1016/j.jallcom.2009.10.069

Temperature profiles in a Ti-45Ni-5Cu (at%) shape memory alloy developed by the Joule heating

Seung yong Yang, Seok won Kang, Yeon Min Lim, Yun jung Lee, Jae il Kim, Tae hyun Nam

School of Electronics Engineering

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

28 Scopus citations

Abstract

Spatially varying temperature profile generated by the Joule heating of a Ti-45Ni-5Cu (at%) alloy wire was investigated by experiment and analysis. The Joule heating is a simple and effective method to fabricate shape memory alloy (SMA) actuators for proportional control. By applying a voltage drop of 1.338 V, a temperature gradient between 504 K and 413 K was obtained experimentally over a length of 30 mm SMA wire. A closed-form expression derived from a simple analytic model was suggested to predict the temperature profile, and the result of the finite element analysis was also provided. Finally, it is demonstrated that the Joule heated specimen shows a low shape recovery rate of 0.02%/K and a unique Lüders-type deformation with a progressively increasing stress level from 340 MPa to 380 MPa.

Original language	English
Pages (from-to)	L28-L32
Journal	Journal of Alloys and Compounds
Volume	490
Issue number	1-2
DOIs	https://doi.org/10.1016/j.jallcom.2009.10.069
State	Published - 4 Feb 2010

Keywords

Functionally graded materials (FGMs)
Martensitic transformation
Numerical analysis
Shape memory alloys (SMAs)
Thermomechanical processing

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10.1016/j.jallcom.2009.10.069

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title = "Temperature profiles in a Ti-45Ni-5Cu (at%) shape memory alloy developed by the Joule heating",

abstract = "Spatially varying temperature profile generated by the Joule heating of a Ti-45Ni-5Cu (at%) alloy wire was investigated by experiment and analysis. The Joule heating is a simple and effective method to fabricate shape memory alloy (SMA) actuators for proportional control. By applying a voltage drop of 1.338 V, a temperature gradient between 504 K and 413 K was obtained experimentally over a length of 30 mm SMA wire. A closed-form expression derived from a simple analytic model was suggested to predict the temperature profile, and the result of the finite element analysis was also provided. Finally, it is demonstrated that the Joule heated specimen shows a low shape recovery rate of 0.02%/K and a unique L{\"u}ders-type deformation with a progressively increasing stress level from 340 MPa to 380 MPa.",

keywords = "Functionally graded materials (FGMs), Martensitic transformation, Numerical analysis, Shape memory alloys (SMAs), Thermomechanical processing",

author = "Yang, {Seung yong} and Kang, {Seok won} and Lim, {Yeon Min} and Lee, {Yun jung} and Kim, {Jae il} and Nam, {Tae hyun}",

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doi = "10.1016/j.jallcom.2009.10.069",

language = "English",

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T1 - Temperature profiles in a Ti-45Ni-5Cu (at%) shape memory alloy developed by the Joule heating

AU - Yang, Seung yong

AU - Kang, Seok won

AU - Lim, Yeon Min

AU - Lee, Yun jung

AU - Kim, Jae il

AU - Nam, Tae hyun

PY - 2010/2/4

Y1 - 2010/2/4

N2 - Spatially varying temperature profile generated by the Joule heating of a Ti-45Ni-5Cu (at%) alloy wire was investigated by experiment and analysis. The Joule heating is a simple and effective method to fabricate shape memory alloy (SMA) actuators for proportional control. By applying a voltage drop of 1.338 V, a temperature gradient between 504 K and 413 K was obtained experimentally over a length of 30 mm SMA wire. A closed-form expression derived from a simple analytic model was suggested to predict the temperature profile, and the result of the finite element analysis was also provided. Finally, it is demonstrated that the Joule heated specimen shows a low shape recovery rate of 0.02%/K and a unique Lüders-type deformation with a progressively increasing stress level from 340 MPa to 380 MPa.

AB - Spatially varying temperature profile generated by the Joule heating of a Ti-45Ni-5Cu (at%) alloy wire was investigated by experiment and analysis. The Joule heating is a simple and effective method to fabricate shape memory alloy (SMA) actuators for proportional control. By applying a voltage drop of 1.338 V, a temperature gradient between 504 K and 413 K was obtained experimentally over a length of 30 mm SMA wire. A closed-form expression derived from a simple analytic model was suggested to predict the temperature profile, and the result of the finite element analysis was also provided. Finally, it is demonstrated that the Joule heated specimen shows a low shape recovery rate of 0.02%/K and a unique Lüders-type deformation with a progressively increasing stress level from 340 MPa to 380 MPa.

KW - Functionally graded materials (FGMs)

KW - Martensitic transformation

KW - Numerical analysis

KW - Shape memory alloys (SMAs)

KW - Thermomechanical processing

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SN - 0925-8388

VL - 490

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JO - Journal of Alloys and Compounds

JF - Journal of Alloys and Compounds

IS - 1-2

ER -

Temperature profiles in a Ti-45Ni-5Cu (at%) shape memory alloy developed by the Joule heating

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Keywords

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