Reliability of tensile fracture strength of Co-based metallic glass microwires by Weibull statistics

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

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Author(s)

  • Wei-Bing Liao
  • Hongti Zhang
  • Peifeng Li
  • Zhiyuan Liu

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Detail(s)

Original languageEnglish
Article number106565
Journal / PublicationMaterials Research Express
Volume6
Issue number10
Online published21 Aug 2019
Publication statusPublished - Oct 2019

Abstract

In this study, continuous Co46Fe20B23Si5Nb6 metallic glass microwires (MGMs) with a smooth surface and negligible fluctuation in diameter size were prepared by the melt-spinning method. The mechanical properties were critically evaluated by mechanical tensile tests. The resulting Co46Fe20B23Si5Nb6 MGMs show high tensile fracture strength of the order of 4000 MPa and perform a large strain of ∼4% prior to fracture. The Weibull statistical analysis shows that the tensile fracture strength reliability parameter of the Co-based MGMs reflected by the Weibull modulus is 13.70. Meanwhile, it demonstrated that the Co-based MGMs exhibit a brittle fracture under tensile experiments. The experimental results provide in-depth understanding of the mechanics and the reliability under loading for designing Co-based MGMs sensors with desired properties.

Research Area(s)

  • amorphous materials, fracture strength, metallic glass microwires, reliability, Weibull modulus

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