Figure 1:Stress-strain curves of 3d-periodic CrMnFeCoNi High Entropy Bulk Metallic Glass (HE-BMG) and nanocrystal (NC) subjected to tensile loading at 50 K and a strain rate of 10⁸s⁻¹ and their respective deformation structures. The maximum stress required to nucleate a shear band in the HE-BMG is higher than the yield strength for dislocation nucleation in the NC. While the compositions are equal and both materials show metallic bonding, the structures are entirely different. On one hand, the structure of the HE-BMG is amorphous. The atoms, which are part of the shear band are coloured white. The NC on the other hand shows long range order. The grain boundary atoms are coloured white. The atoms in the grain are coloured according to their crystalline structure. Due to the deformation dislocations are introduced into the grains and hcp and fcc stacking faults form, coloured in red and green, respectively.