Tensile and fatigue behaviour of Ni–Ni3Si eutectic in situ composites

C. Cui, T. Xue, Y. Jin, T. Zhai

Research output: Contribution to journalArticlepeer-review

3 Scopus citations


A Ni–Ni3Si composite was fabricated via a eutectic reaction (Ni–Ni3Si) using a rapidly cooled directional solidification technique at a solidification rate of 40 μm s−1. The composite consisted of approximately 62.2% Ni–Si solid solution and 37.8% Ni–Ni3Si eutectic phase in volume. Four-point bend fatigue tests were carried out on the composite. The fatigue strength of the alloy was measured to be 520 MPa (maximum cyclic stress). It was found that the fatigue cracks were preferably initiated in the Ni–Ni3Si eutectic phase, and that the Ni matrix was fractured in a cleavage fashion. It was probably attributed to the high level of supersaturated Si in the Ni matrix, which led to inducing the embrittlement of the Ni matrix.

Original languageEnglish
Pages (from-to)1053-1058
Number of pages6
JournalMaterials Science and Technology (United Kingdom)
Issue number10
StatePublished - Jul 2 2016

Bibliographical note

Publisher Copyright:
© 2016 Institute of Materials, Minerals and Mining.


  • Directional solidification
  • Eutectic in situ composite
  • Four-point bend fatigue test
  • S–N curve

ASJC Scopus subject areas

  • General Materials Science
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering


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