Abstract
This study investigated the nanoindentation behavior of Au 49Ag 5.5Pd 2.3Cu 26.9Si 16.3 bulk metallic glass samples at loading rates ranging from 0.03 to 300 mN s −1. Notable shear band pop-in events were observed. The pop-in size was observed to increase linearly with the load and decreased exponentially with the strain rate. A free-volume mechanism was proposed for interpreting these observations quantitatively. The results and analyses also shed light on the shear band nucleation and evolution processes in bulk metallic glasses.
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