Original title: Dynamic stability of Ni fcc crystal under isotropic tension
Authors: Řehák, Petr ; Černý, M.
Document type: Papers
Conference/Event: MSMF 7 - International Conference on Materials Structure and Micromechanics of Fracture /7./, Brno (CZ), 20130701
Year: 2014
Language: eng
Abstract: Lattice dynamics and stability of fcc crystal of Ni under isotropic (hydrostatic) tensile loading are studied from first principles using supercell method and a harmonic approximation. According to the results, strength of the crystal is determined by occurrence of an instability related to soft phonons with finite wave vector. On the other hand, the critical strains and stresses associated with such instabilities are only slightly lower than those related to the volumetric instability.
Keywords: ab initio calculations; isotropic loading; lattice dynamics; phonon instability
Project no.: ED1.1.00/02.0068
Funding provider: GA MŠk
Host item entry: MATERIALS STRUCTURE & MICROMECHANICS OF FRACTURE VII, ISBN 978-3-03785-934-6, ISSN 1013-9826

Institution: Institute of Physics of Materials AS ČR (web)
Document availability information: Fulltext is available at the institute of the Academy of Sciences.
Original record: http://hdl.handle.net/11104/0279777

Permalink: http://www.nusl.cz/ntk/nusl-373424


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