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Dynamic stability of Ni fcc crystal under isotropic tension
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SYSNO ASEP 0484583 Document Type C - Proceedings Paper (int. conf.) R&D Document Type Conference Paper Title Dynamic stability of Ni fcc crystal under isotropic tension Author(s) Řehák, Petr (UFM-A)
Černý, M. (CZ)Number of authors 2 Source Title MATERIALS STRUCTURE & MICROMECHANICS OF FRACTURE VII. - Zurich : Trans Tech Publications, 2014 / Šandera P. - ISSN 1013-9826 - ISBN 978-3-03785-934-6 Pages s. 47-50 Number of pages 4 s. Publication form Print - P Action MSMF 7 - International Conference on Materials Structure and Micromechanics of Fracture /7./ Event date 01.07.2013 - 03.07.2013 VEvent location Brno Country CZ - Czech Republic Event type WRD Language eng - English Country CH - Switzerland Keywords lattice dynamics ; phonon instability ; isotropic loading ; ab initio calculations Subject RIV BM - Solid Matter Physics ; Magnetism OECD category Condensed matter physics (including formerly solid state physics, supercond.) R&D Projects ED1.1.00/02.0068 GA MŠMT - Ministry of Education, Youth and Sports (MEYS) Institutional support UFM-A - RVO:68081723 UT WOS 000336694400007 EID SCOPUS 84891889575 DOI 10.4028/www.scientific.net/KEM.592-593.47 Annotation 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. Workplace Institute of Physics of Materials Contact Yvonna Šrámková, sramkova@ipm.cz, Tel.: 532 290 485 Year of Publishing 2018
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