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

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 M...

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Bibliographic Details
Published in:Materials research express 2019-08, Vol.6 (10), p.106565
Main Authors: Liao, Wei-Bing, Jiang, Chenchen, Xu, Shang, Gao, Libo, Zhang, Hongti, Li, Peifeng, Liu, Zhiyuan, Lu, Yang
Format: Article
Language:English
Subjects:
amorphous materials
fracture strength
metallic glass microwires
reliability
Weibull modulus
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Summary: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.
ISSN:2053-1591
2053-1591
DOI:10.1088/2053-1591/ab3931