The activation energy and volume of flow units of metallic glasses

We report that the average activation energy and volume of flow units of metallic glasses can be measured by a dynamic mechanical analysis which is a sensitive tool for detecting atomic rearrangements associated with the flow “defects”. The obtained activation energy and volumes flow units of various metallic glasses are in agreement with that determined by other experimental methods and simulations. A correlation between the volume of plastic units and Poisson’s ratio of various metallic glasses is found.