Jinna Mei, Jinshan Li, Hongchao Kou, Rui Hu, Hengzhi Fu,  and Lian Zhou, Effects of Ta addition on the microstructure and mechanical properties of Ti40Zr25Ni8Cu9Be18 amorphous alloy, J. Univ. Sci. Technol. Beijing, 14(2007), No. S1, pp. 31-35. https://doi.org/10.1016/S1005-8850(07)60103-0
Cite this article as:
Jinna Mei, Jinshan Li, Hongchao Kou, Rui Hu, Hengzhi Fu,  and Lian Zhou, Effects of Ta addition on the microstructure and mechanical properties of Ti40Zr25Ni8Cu9Be18 amorphous alloy, J. Univ. Sci. Technol. Beijing, 14(2007), No. S1, pp. 31-35. https://doi.org/10.1016/S1005-8850(07)60103-0
Materials

Effects of Ta addition on the microstructure and mechanical properties of Ti40Zr25Ni8Cu9Be18 amorphous alloy

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  • Corresponding author:

    Jinshan Li    E-mail: ljsh@nwpu.edu.cn

  • Received: 22 June 2006
  • The effects of Ta addition on the microstructure and mechanical properties of Ti40Zr25Ni8Cu9Be18 bulk amorphous alloy were investigated by using X-ray diffraction (XRD), transmission electron microscopy (TEM), scan electron microscopy (SEM) and compressive testing. As a result, the addition of Ta (0-8at%) prompted the successive precipitation of quasicrystalline phase, CuTi2 phase and bcc β-Ti solid solution. Additionally, the addition of less Ta content (3at%-5at%) led to the formation of amorphous matrix/nanoquasicrystal/CuTi2 complex phase structure; and nanoquasicrystals, as reinforcement precipitates, improved the fracture strength of Ti-Zr-Ni-Cu-Be-Ta alloys, which led to the high compressive fracture strength 1856 MPa of Ta5 alloy. With increasing Ta content (5at%-8at%), although the ductile dendritic β-Ti solid solution was precipitated, the strength and plasticity decreased to a great extent resulting from the growth of quasicrystalline phase and CuTi2 phase.
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