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

    @article{9df36aa52ddd4983a88b471e53003067,
    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",
    day = "15",
    doi = "10.1016/j.scriptamat.2016.09.007",
    language = "English",
    volume = "127",
    pages = "84--87",
    journal = "Scipta Materialia",
    issn = "1359-6462",
    publisher = "Elsevier",

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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 -