A Low-Cost Ni-Mn-Ti-B High-Temperature Shape Memory Alloy with Extraordinary Functional Properties

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journalpeer-review

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Author(s)

  • Shaohui Li
  • Daoyong Cong
  • Wenxin Xiong
  • Zhen Chen
  • Xin Zhang
  • Zhihua Nie
  • Shengwei Li
  • Runguang Li
  • Youkang Wang
  • Yuxian Cao
  • Yandong Wang

Detail(s)

Original languageEnglish
Pages (from-to)31870-31879
Journal / PublicationACS Applied Materials and Interfaces
Volume13
Issue number27
Online published2 Jul 2021
Publication statusPublished - 14 Jul 2021
Externally publishedYes

Abstract

The rapid development of aerospace, automotive, and energy exploration industries urgently requires high-temperature shape memory alloys (HTSMAs) which are utilized as compact solid-state actuators, sensors, and energy conversion devices at elevated temperatures. However, the currently prevailing Ni-Ti-X (X = Pd, Pt, and Hf) HTSMAs are very expensive owing to the high cost of Pd, Pt, and Hf elements, which greatly limits their widespread applications. Here, we have developed an inexpensive (Ni50Mn35.5Ti14.5)99.8B0.2 bulk polycrystalline HTSMA with extraordinary high-temperature superelasticity and a giant two-way shape memory effect (TWSME). This alloy exhibits perfect superelasticity with a fully recoverable strain of as high as 7.1% over a wide temperature range from 150 to 280 °C. Furthermore, it shows a giant TWSME with a remarkably high recoverable strain of 6.0%. Both the recoverable strain of superelasticity and the two-way shape memory strain of the present alloy are the highest among the bulk polycrystalline HTSMAs. The theoretical maximum transformation strain was calculated with energy-minimization theory using the crystal structure information of martensite and austenite obtained from in situ synchrotron high-energy X-ray diffraction experiments to help understand the superelastic behavior of the present alloy. Combining the advantages of low cost and easy fabrication, the present bulk polycrystalline (Ni50Mn35.5Ti14.5)99.8B0.2 alloy shows great potential for high-temperature shape memory applications. This work is instructive for developing cost-effective high-performance HTSMAs.

Research Area(s)

  • high-temperature superelasticity, martensitic transformation, shape memory alloy, twinning, two-way shape memory effect

Citation Format(s)

A Low-Cost Ni-Mn-Ti-B High-Temperature Shape Memory Alloy with Extraordinary Functional Properties. / Li, Shaohui; Cong, Daoyong; Xiong, Wenxin; Chen, Zhen; Zhang, Xin; Nie, Zhihua; Li, Shengwei; Li, Runguang; Wang, Youkang; Cao, Yuxian; Ren, Yang; Wang, Yandong.

In: ACS Applied Materials and Interfaces, Vol. 13, No. 27, 14.07.2021, p. 31870-31879.

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journalpeer-review