Detail publikačního výsledku

Dynamic stability of Ni fcc crystal under isotropic tension

ŘEHÁK, P.; ČERNÝ, M.

Originální název

Dynamic stability of Ni fcc crystal under isotropic tension

Anglický název

Dynamic stability of Ni fcc crystal under isotropic tension

Druh

Článek WoS

Originální abstrakt

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.

Anglický abstrakt

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.

Klíčová slova

lattice dynamics, phonon instability, isotropic loading, ab initio calculations

Klíčová slova v angličtině

lattice dynamics, phonon instability, isotropic loading, ab initio calculations

Autoři

ŘEHÁK, P.; ČERNÝ, M.

Rok RIV

2015

Vydáno

01.01.2014

Nakladatel

Trans Tech Publication

Místo

Zurich

ISSN

1013-9826

Periodikum

Key Engineering Materials (print)

Svazek

592-593

Číslo

1

Stát

Švýcarská konfederace

Strany od

47

Strany do

50

Strany počet

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"
}