The Critical Criterion on Runaway Shear Banding in Metallic Glasses.

ABSTRACT: The plastic flow of metallic glasses (MGs) in bulk is mediated by nanoscale shear bands, which is known to proceed in a stick-slip manner until reaching a transition state causing catastrophic failures. Such a slip-to-failure transition controls the plasticity of MGs and resembles many important phenomena in natural science and engineering, such as friction, lubrication and earthquake, therefore has attracted tremendous research interest over past decades. However, despite the fundamental and practical importance, the physical origin of this slip-to-failure transition is still poorly understood. By tracking the behavior of a single shear band, here we discover that the final fracture of various MGs during compression is triggered as the velocity of the dominant shear band rises to a critic

SUBMITTER: Sun BA 

PROVIDER: S-EPMC4759565 | biostudies-literature | 2016 Feb

REPOSITORIES: biostudies-literature