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Designed heterogeneities improve the fracture reliability of a Zr-based bulk metallic glass

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  • Bulk metallic glasses (BMGs) have been reported to have large variability in mode I fracture toughness. In this study, alternating soft and hard regions were created in a Zr₅₂.₅Ti₅Cu₁₈Ni₁₄.₅Al₁₀ (at%) BMG via mechanical imprinting at room temperature. While only 50% of as-cast samples demonstrated plastic deformation during mode I fracture tests, 100% of imprinted samples demonstrated measurable plasticity and the scatter in measured mode I fracture toughness was significantly reduced. Mechanical treatments show promise for improving the fracture reliability of BMGs.
  • Keywords: Fracture toughness, Fracture morphology, Shear bands, Ductility, Bulk metallic glasses
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  • Li, B. S., Shakur Shahabi, H., Scudino, S., Eckert, J., & Kruzic, J. J. (2015). Designed heterogeneities improve the fracture reliability of a Zr-based bulk metallic glass. Materials Science and Engineering: A - Structural Materials: Properties, Microstructure and Processing, 646, 242-248. doi:10.1016/j.msea.2015.08.055
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  • 646
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  • Financial support of the German Science Foundation under the Leibniz Program (Grant EC 111/26-1) and the European Research Council under the European Research Council Advanced grant INTELHYB (Grant ERC-2013-ADG-340025) is gratefully acknowledged. JJK would like to acknowledge financial support from the Alexander von Humboldt Foundation Fredrick Wilhelm Bessel Research Award.
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