Nanocrystalline strain glass TiNiPt and its superelastic behavior

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

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Author(s)

  • Daqiang Jiang
  • Jiale An
  • Yinong Liu
  • Zhiyuan Ma
  • Fangfeng Liu
  • Hong Yang
  • Xiaobing Ren
  • Kaiyuan Yu
  • Junsong Zhang
  • Xiaohua Jiang
  • Lishan Cui

Detail(s)

Original languageEnglish
Article number024102
Journal / PublicationPhysical Review B
Volume104
Issue number2
Publication statusPublished - 1 Jul 2021
Externally publishedYes

Abstract

TiNi-based shape-memory alloys are known to exhibit a strain glass state under certain conditions, generally in the presence of high-density defects such as excess solute atoms or alloying elements, dislocations, and nanoprecipitates. In this paper, we report a strain glass transition in a nanocrystalline Ti50Ni35Pt15 alloy. The nanocrystalline strain glass state is achieved by a combined effect of high-density grain boundaries and high concentration doping of Pt atoms in the B2 matrix. The nanocrystalline Ti50Ni35Pt15 strain glass alloy showed a large near-complete progressive superelasticity with a recovery strain of about 6% and a low apparent Young's modulus of about 30 GPa in a wide temperature range of over 200 °C. In situ synchrotron x-ray diffraction measurement showed that the strain glass B2 [B2(SG)] phase experienced B2(SG)→R→B19 transformation upon loading and B19→B2(SG) upon unloading. The findings of this study provide insight for the development of nanocrystalline strain glass shape-memory alloys.

Citation Format(s)

Nanocrystalline strain glass TiNiPt and its superelastic behavior. / Jiang, Daqiang; An, Jiale; Liu, Yinong; Ma, Zhiyuan; Liu, Fangfeng; Yang, Hong; Ren, Xiaobing; Yu, Kaiyuan; Zhang, Junsong; Jiang, Xiaohua; Ren, Yang; Cui, Lishan.

In: Physical Review B, Vol. 104, No. 2, 024102, 01.07.2021.

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