Journal
PHYSICAL REVIEW B
Volume 80, Issue 10, Pages -Publisher
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevB.80.104201
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Funding
- DOE [DEFG02-99ER45784]
- Johns Hopkins University
- ARO [ARO-W911NF-07-01-0490]
- NSF [NSF-0907320]
- Research Grants Council of the Hong Kong Special Administrative Region, China [PolyU 7196/06E]
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We propose a phenomenological theory to model shear banding, shear-band propagation and branching on mesoscopic scales in metallic glasses by using Ginzburg-Landau formulism. The disordering caused by mechanical or thermal agitation is represented by atomic volume dilatation and used as an order parameter. This model captures several important features in the deformation process, namely, shear localization or banding, shear-band propagation and branching, and crack propagation and its velocity. We also assessed the relation between the crack propagation velocity and local heating and the connection between the serrated flow and shear band branching.
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