Scale-free statistics of plasticity-induced surface steps on KCl single crystals

Abstract

Experimental investigations of plastic flow have demonstrated temporal intermittency as deformation proceeds in a series of intermittent bursts with scale-free size distribution. In the present investigation, a corresponding spatial intermittency is demonstrated for plastic flow of KCl single crystals. Deformation bursts lead to large surface steps with a height distribution that is consistent with the distribution of strain increments in deformation of micro-columns, and the energy distribution of acoustic emission bursts observed in deformation of macroscopic single crystal samples of a wide class of materials.

References in corpus (4)

• Intermittent dislocation flow in viscoplastic deformation
• Self-affine surface morphology of plastically deformed metals
• Fluctuation phenomena in crystal plasticity - a continuum model
• On the critical character of plasticity in metallic single crystals

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