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The shear-banding instability in quasi-statically driven bulk metallicglasses emerges from collective dynamics, mediated by shear transformationzones and associated non-local elastic interactions. It is alsophenomenologically known that sharp structural features of shear bands aretypically correlated to the sharpness of the plastic yielding transition, beingpredominant in commonly studied alloys composed of multiple different elements,that have very different atomic radii. However, in the opposite limit\remove{of high-entropy multicomponent alloys,} where elements' radii arerelatively similar, plastic yielding of bulk metallic glasses is highlydependent on compositional and ordering features. In particular, a knownmechanism at play involves the formation of short-range order dominated byicosahedra-based clusters. Here, we report on atomistic simulations ofmulti-component metallic glasses with different chemical compositions showingthat the degree of strain localization is largely controlled by the interplaybetween composition-driven icosahedra-ordering and collectively-driven sheartransformation zones. By altering compositions, strain localization ranges fromdiffuse homogenized patterns to singular crack-like features. We quantify thedynamical yielding transition by measuring the atoms' susceptibility to plasticrearrangements, strongly correlated to the local atomic structure. We find thatthe abundance of short-range ordering of icosahedra within rearranging zonesincreases glassy materials' capacity to delocalize strain. The kind of plasticyielding can be often qualitatively inferred by the commonly used compositionaldescriptor that characterizes element associations, the misfit parameter$\delta_a$, and also by uncommon ones, such as shear-band width and shear-banddynamics' correlation parameters.

Shear banding instability in \remove{high entropy} multi-component metallic glasses: Interplay of composition and short-range order}