The origin of lattice instability in bcc tungsten under triaxial loading

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216305%3A26620%2F17%3APU124229" target="_blank" >RIV/00216305:26620/17:PU124229 - isvavai.cz</a>

Result on the web

<a href="http://dx.doi.org/10.1080/14786435.2017.1363424" target="_blank" >http://dx.doi.org/10.1080/14786435.2017.1363424</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1080/14786435.2017.1363424" target="_blank" >10.1080/14786435.2017.1363424</a>

Result language

angličtina

Original language name

The origin of lattice instability in bcc tungsten under triaxial loading

Original language description

Stability of ideal bcc tungsten crystal under triaxial tensile loading was explored from first principles using an analysis of both elastic and dynamic stability. The triaxial stress state was considered a superposition of axial and biaxial transverse stresses. The region of attainable stresses which was delimited using the computed tensile stress maxima was marginally reduced by occurrence of soft phonons in the crystal lattice. While, under purely hydrostatic tension, the crystal was predicted stable up to 48GPa, greater magnitude of a differential stress reduced the value of a mean (hydrostatic) stress associated with first phonon instabilities to about 35GPa. This value is rather close to that recently determined in experiment. Computed phonon spectra were successfully verified with the help of atomistic models of microscopic lattice deformation.

Czech name

—

Czech description

—

Type

J_imp - Article in a specialist periodical, which is included in the Web of Science database

CEP classification

—

OECD FORD branch

10302 - Condensed matter physics (including formerly solid state physics, supercond.)

Project

Result was created during the realization of more than one project. More information in the Projects tab.

Continuities

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Publication year

2017

Confidentiality

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Name of the periodical

PHILOSOPHICAL MAGAZINE

ISSN

1478-6435

e-ISSN

1478-6443

Volume of the periodical

97

Issue of the periodical within the volume

32

Country of publishing house

GB - UNITED KINGDOM

Number of pages

14

Pages from-to

2971-2984

UT code for WoS article

000415827400002

EID of the result in the Scopus database

2-s2.0-85028560289