期刊
EPL
卷 87, 期 6, 页码 -出版社
EPL ASSOCIATION, EUROPEAN PHYSICAL SOCIETY
DOI: 10.1209/0295-5075/87/66004
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资金
- Deutsche Forschungsgemeinschaft [154/25-1]
- European Network of Excellence on Complex Metallic Alloys [NMP3-CT-2005-500140]
The fracture of a three-dimensional brittle solid generates two-dimensional surfaces, which are formed behind a one-dimensional crack front. For quasi-static cracks on a (111) cleavage plane in silicon front propagation by kink-pair formation was proposed and proven by a reaction pathway analysis with Stillinger-Weber potentials. Here, we demonstrate that the kink-pair mechanism is much more general: we also observe it in molecular-dynamics simulations of a complex metallic alloy, the C15 NbCr(2) Friauf-Laves phase, where we applied carefully selected embedded-atom-method potentials. The numerical experiments highlight that kink formation is essential for crack propagation in any brittle material. Copyright (C) EPLA, 2009
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