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

被引：30

作者：

Meng, Qinglin ^{[1
]}

Wu, Zhigang ^{[1
]}

Bakhtiari, Reza ^{[1
]}

Shariat, Bashir S. ^{[1
]}

Yang, Hong ^{[1
]}

Liu, Yinong ^{[1
]}

Tae-hyun Nam ^{[2
,3
]}

机构：

[1] Univ Western Australia, Sch Mech & Chem Engn, 35 Stirling Highway, Crawley, WA 6009, Australia

[2] Gyeongsang Natl Univ, Sch Mat Sci & Engn, 900 Gazwadong, Jinju 660701, Gyeongnam, South Korea

[3] Gyeongsang Natl Univ, RIGET, 900 Gazwadong, Jinju 660701, Gyeongnam, South Korea

来源：

SCRIPTA MATERIALIA | 2017年 / 127卷

基金：

澳大利亚研究理事会;

关键词：

Shape memory alloy (SMA); Functionally graded materials (FGM); Two-way shape memory effect; INDUCED MARTENSITIC-TRANSFORMATION; ZN-AL ALLOYS; THIN-FILMS; DEFORMATION; STRESS; STABILIZATION; TINI; REORIENTATION;

D O I：

10.1016/j.scriptamat.2016.09.007

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

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. (C) 2016 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.

引用

页码：84 / 87

页数：4

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