Abstract
Formation of periodical fracture surface marks in the dynamic fracture can only be observed, mainly in ideally brittle amorphous materials and under mode I loading conditions. Here the authors report on the observation of elastic-wave patterns on nanoscale that form in the compressive fracture process of a Ni-based alloy which is a less-brittle amorphous metal with an appreciable compressive ductility. The formation of nanowaves is evidenced via the creation of microbranching instability as well as the interaction of a crack front with the material inhomogeneities, i.e., microcracks.
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