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

Q. Meng, Zhigang Wu, Reza Bakhtiari, Bashir Shariat, Hong Yang, Yinong Liu, T.h. Nam

Research output: Contribution to journalArticle

20 Citations (Scopus)
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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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