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Slip avalanches in amorphous metals

Todd Hufnagel Johns Hopkins University (410) 516-6277

Karin A. Dahmen University of Illinois

Mechanics in Materials Science

Metallic glasses commonly exhibit intermittent slip behavior associated with the formation and propagation of shear bands. It is widely believed that shear banding can be attributed to collective behavior of flow defects, known as shear transformation zones. The slip behavior of metallic glasses appears to be an example of a much wider class of collective behaviors in condensed matter systems that exhibit responses which are intermittent in time and geometrically complex in space, spanning orders of magnitude in each. Examples include slip avalanches in crystals, avalanches in martensitic transformations, Barkhausen noise, and fracture. In all of these, complex behavior can emerge from surprisingly simple models of defect behavior and interactions, and the same appears to be true of slip dynamics in metallic glasses as well. This symposium seeks to bring together researchers from the solid mechanics, materials science, and condensed matter/statistical physics communities who are interested in the dynamics of slip in metallic glasses from theoretical, computational, and experimental points of view. The aim of these interactions is to provide theoretical and computational insights into experimental results, and to present experimental results that can inspire new theoretical and computational investigations.

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