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ŘEHÁK, P. ČERNÝ, M.
Original Title
Dynamic stability of Ni fcc crystal under isotropic tension
Type
journal article in Web of Science
Language
English
Original Abstract
Phonon spectra of Ni lattice are calculated for several crystal volumes. Phonon dispersions of unstressed crystal are in a very good agreement with experimental data. Under isotropic expansion, the lattice softens and, 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
lattice dynamics, phonon instability, isotropic loading, ab initio calculations
Authors
ŘEHÁK, P.; ČERNÝ, M.
RIV year
2014
Released
1. 1. 2014
Publisher
Trans Tech Publication
Location
Zurich
ISBN
1013-9826
Periodical
Key Engineering Materials (print)
Year of study
592-593
Number
1
State
Swiss Confederation
Pages from
47
Pages to
50
Pages count
4
BibTex
@article{BUT100974, author="Petr {Řehák} and Miroslav {Černý}", title="Dynamic stability of Ni fcc crystal under isotropic tension", journal="Key Engineering Materials (print)", year="2014", volume="592-593", number="1", pages="47--50", doi="10.4028/www.scientific.net/KEM.592-593.47", issn="1013-9826" }