Selective laser melted high Ni content TiNi alloy with superior superelasticity and hardwearing

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

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Author(s)

  • Hui Shen
  • Qingquan Zhang
  • Ying Yang
  • Yanbao Guo
  • Yafeng Yang
  • Zhonghan Li
  • Zhiwei Xiong
  • Xiangguang Kong
  • Zhihui Zhang
  • Fangmin Guo
  • Lishan Cui
  • Shijie Hao

Related Research Unit(s)

Detail(s)

Original languageEnglish
Pages (from-to)246-257
Journal / PublicationJournal of Materials Science and Technology
Volume116
Online published20 Jan 2022
Publication statusPublished - 20 Jul 2022

Abstract

TiNi alloys with high content Ni (52–55 at.%) are perfectly suitable for preparing wear- and corrosion-resistant parts that service on the space station, spacecraft, and submarine, because of their superior superelasticity, high strength, and hardwearing. However, the fabrication of complicated Ni-rich TiNi parts by the traditional machining method often faces problems of poor precision, low efficiency, and high cost. In this work, we succeed in preparing an excellent Ti47Ni53 alloy by selective laser melting (SLM), and thus, open a new way for the efficient and precise formation of complicated Ni-rich TiNi parts with superelasticity and hardwearing. An optimized processing window for compact parts without defects is reported. The elaborately fabricated Ti47Ni53 alloy exhibited a breaking strain of 11%, a breaking stress of 2.0 GPa, a superelastic strain of 9%, and a better hardwearing than that of casting and quenched Ti47Ni53 alloy. Besides, the microstructure, phase transformation, and deformation, as well as their influence mechanisms are investigated by in situ transmission electron microscope (TEM) and high-energy X-ray diffraction (HE-XRD). The results obtained are of significance for both fundamental research and technological applications of SLM-fabricated high Ni content TiNi alloys.

Research Area(s)

  • High Ni content TiNi, In situ high-energy X-ray diffraction, Microstructure, Selective laser melting, Superelasticity, Wear

Citation Format(s)

Selective laser melted high Ni content TiNi alloy with superior superelasticity and hardwearing. / Shen, Hui; Zhang, Qingquan; Yang, Ying; Ren, Yang; Guo, Yanbao; Yang, Yafeng; Li, Zhonghan; Xiong, Zhiwei; Kong, Xiangguang; Zhang, Zhihui; Guo, Fangmin; Cui, Lishan; Hao, Shijie.

In: Journal of Materials Science and Technology, Vol. 116, 20.07.2022, p. 246-257.

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