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Phase stability of the amorphous phase and non-equilibrium phase in a β Ti-Zr-based shape memory alloy

Scripta Materialia, ISSN: 1359-6462, Vol: 195, Page: 113721
2021
  • 14
    Citations
  • 0
    Usage
  • 11
    Captures
  • 0
    Mentions
  • 9
    Social Media
Metric Options:   Counts1 Year3 Year

Metrics Details

  • Citations
    14
    • Citation Indexes
      14
  • Captures
    11
  • Social Media
    9
    • Shares, Likes & Comments
      9
      • Facebook
        9

Article Description

This work presents the amorphization of metastable β phase and the phase stability of the amorphous phase and non-equilibrium phase in a Ti-Zr-Nb-Sn shape memory alloy (SMA). The amorphous phases with lenticular shape uniformly embedded in β matrix are observed in the twin-jet-electropolished thin foil specimen for transmission electron microscope (TEM) observations. Meanwhile, a co-existence of non-equilibrium athermal ω phase and nanodomain phases are found to be formed in the β matrix. These non-equilibrium phases could favorably compete with the amorphous phase formation and render the amorphous phases are not formed, leading to that the amorphous phase is not observed in the bulk specimens for X-ray diffraction (XRD) and electron back-scattered diffraction (EBSD) and also TEM specimen prepared by a focused ion beam (FIB). The formation of the amorphous phase in the twin-jet-electropolished TEM specimen is thought to be due to the hydrogen-related artifacts introduced during twin-jet electropolishing.

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