Transitions from oscillatory to smooth fracture propagation in brittle metallic glasses

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Y. Braiman¹ and T. Egami^1,2,3
¹Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, USA
²Department of Materials Science and Engineering, University of Tennessee, Knoxville, Tennessee 37996, USA
³Department of Physics and Astronomy, University of Tennessee, Knoxville, Tennessee 37996, USA

Received 12 September 2007; revised 26 March 2008; published 11 June 2008

Wepresent a simple model to explain the transition from oscillatoryto smooth crack propagation in brittle metallic glasses. We demonstratethat the smooth fracture propagation that is characteristic for highertemperature or higher crack opening velocities (for type 1 crackpropagation) becomes unstable and oscillatory behavior is being observed. Thecharacteristic feature size of the crack propagation may be atthe nanometer scale and grows as the opening velocity decreases.

URL:	http://link.aps.org/doi/10.1103/PhysRevE.77.065101
DOI:	10.1103/PhysRevE.77.065101
PACS:	62.20.M-; 81.40.Np 62.20.M- Structural failure of materials 81.40.Np Fatigue, embrittlement, fracture and failure YEAR: 2008
KEYWORDS:	brittleness, cracks, fracture, metallic glasses

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Phys. Rev. E 77, 065101(R) (2008) [4 pages]

Transitions from oscillatory to smooth fracture propagation in brittle metallic glasses

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