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Aspect ratio effects on the serration dynamics of a Zr-based bulk metallic glass

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Abstract

Based on the constant strain rate compressive experiments to a Zr-based bulk metallic glass, the aspect ratio effects on the statistical properties of serration is systematically investigated. In the plastic deformation state, as the aspect ratio decreases, the stress drop magnitude increases dramatically and the reloading time in one serration event increases significantly. Moreover, distribution of the elastic energy density of each serration event is predicted, which obeys the squared exponential decay law. The size effect law is adopted to describe the serration dynamic-related parametric variation with different aspect ratios. It is noted that the scaling exponent reduces with the increase of the aspect ratio. In general, the effect of aspect ratio on the serration flow could be explained by the shear-band stability index.

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Acknowledgements

This work was supported by the National Natural Science Foundation of China (No.51401192, 51611130120, 51301136, and 11572249), the Fundamental Research Funds for the Central Universities (No.3102015ZY027 and 3102015BJ(II)JGZ019), the Aeronautical Science Foundation of China (2015ZF53072), and the Natural Science Foundation of Shaanxi Province (No.2016JM5009).

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Authors and Affiliations

  1. School of Mechanics, Civil Engineering and Architecture, Northwestern Polytechnical University, Xi’an, 710072, People’s Republic of China

    Z. F. Yao, J. C. Qiao & Y. Yao

  2. Department of Earth Sciences, Debye Institute for Nanomaterials Science, Utrecht University, Princetonplein 5, 3584, Utrecht, The Netherlands

    Y. Liu

  3. Université de Lyon, MATEIS, UMR CNRS5510, Bat. B. Pascal, INSA-Lyon, 69621, Villeurbanne Cedex, France

    J. M. Pelletier

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  1. Z. F. Yao
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Correspondence to J. C. Qiao or Y. Yao.

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Yao, Z.F., Qiao, J.C., Liu, Y. et al. Aspect ratio effects on the serration dynamics of a Zr-based bulk metallic glass. J Mater Sci 52, 138–144 (2017). https://doi.org/10.1007/s10853-016-0316-7

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