Flow units perspective on sensitivity and reliability of metallic glass properties

• The metastability of metallic glasses described by the Weibull distribution function.
• The concentration of flow units follows the Weibull distribution function.
• The properties sensitivity and metastability of metallic glasses can be explained by variation of flow units.

The metastability of metallic glasses (MGs) can be well described by the Weibull distribution function. We study the relationship between flow units and mechanical properties and find that the concentration of flow units also follows the Weibull distribution function as do other properties of MG. The results suggest that the properties' sensitivity and metastability of MGs described by the Weibull distribution function can be explained by the structural heterogeneity (or flow unit) perspective and attributed to the variation of the flow units.

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