A unique “fishtail-like” four-way shape memory effect of compositionally graded NiTi

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Abstract

© 2016 Acta Materialia Inc.
This paper reports a complex four-way shape memory effect of a compositionally graded NiTi thin plate. The composition gradient is created by surface diffusion of Ni into the plate. After a 15% tensile deformation pre-treatment, the compositionally graded plate exhibits a complex four-way shape memory effect in bending mode, by which the metal exhibits a back-and-forth shape change upon a complete thermal cycle. This is analogous to a “fishtail-like” motion, resulting from the sequential transformation through the thickness of the plate as dictated by Ni content gradient. Such “four-way” shape memory effect has not been achieved in NiTi alloys before.
Original languageEnglish
Pages (from-to)84-87
Number of pages4
JournalScripta Materialia
Volume127
DOIs
Publication statusPublished - 15 Jan 2017

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Shape memory effect
tensile deformation
gradients
Surface diffusion
thin plates
surface diffusion
pretreatment
Metals
cycles
Chemical analysis
metals

Cite this

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title = "A unique “fishtail-like” four-way shape memory effect of compositionally graded NiTi",
abstract = "{\circledC} 2016 Acta Materialia Inc.This paper reports a complex four-way shape memory effect of a compositionally graded NiTi thin plate. The composition gradient is created by surface diffusion of Ni into the plate. After a 15{\%} tensile deformation pre-treatment, the compositionally graded plate exhibits a complex four-way shape memory effect in bending mode, by which the metal exhibits a back-and-forth shape change upon a complete thermal cycle. This is analogous to a “fishtail-like” motion, resulting from the sequential transformation through the thickness of the plate as dictated by Ni content gradient. Such “four-way” shape memory effect has not been achieved in NiTi alloys before.",
author = "Q. Meng and Zhigang Wu and Reza Bakhtiari and Bashir Shariat and Hong Yang and Yinong Liu and T.h. Nam",
year = "2017",
month = "1",
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doi = "10.1016/j.scriptamat.2016.09.007",
language = "English",
volume = "127",
pages = "84--87",
journal = "Scipta Materialia",
issn = "1359-6462",
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TY - JOUR

T1 - A unique “fishtail-like” four-way shape memory effect of compositionally graded NiTi

AU - Meng, Q.

AU - Wu, Zhigang

AU - Bakhtiari, Reza

AU - Shariat, Bashir

AU - Yang, Hong

AU - Liu, Yinong

AU - Nam, T.h.

PY - 2017/1/15

Y1 - 2017/1/15

N2 - © 2016 Acta Materialia Inc.This paper reports a complex four-way shape memory effect of a compositionally graded NiTi thin plate. The composition gradient is created by surface diffusion of Ni into the plate. After a 15% tensile deformation pre-treatment, the compositionally graded plate exhibits a complex four-way shape memory effect in bending mode, by which the metal exhibits a back-and-forth shape change upon a complete thermal cycle. This is analogous to a “fishtail-like” motion, resulting from the sequential transformation through the thickness of the plate as dictated by Ni content gradient. Such “four-way” shape memory effect has not been achieved in NiTi alloys before.

AB - © 2016 Acta Materialia Inc.This paper reports a complex four-way shape memory effect of a compositionally graded NiTi thin plate. The composition gradient is created by surface diffusion of Ni into the plate. After a 15% tensile deformation pre-treatment, the compositionally graded plate exhibits a complex four-way shape memory effect in bending mode, by which the metal exhibits a back-and-forth shape change upon a complete thermal cycle. This is analogous to a “fishtail-like” motion, resulting from the sequential transformation through the thickness of the plate as dictated by Ni content gradient. Such “four-way” shape memory effect has not been achieved in NiTi alloys before.

U2 - 10.1016/j.scriptamat.2016.09.007

DO - 10.1016/j.scriptamat.2016.09.007

M3 - Article

VL - 127

SP - 84

EP - 87

JO - Scipta Materialia

JF - Scipta Materialia

SN - 1359-6462

ER -