Dislocation motion in tungsten: Atomistic input to discrete dislocation simulations

Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68081723%3A_____%2F13%3A00435008" target="_blank" >RIV/68081723:_____/13:00435008 - isvavai.cz</a>
Result on the web
<a href="http://dx.doi.org/10.1016/j.ijplas.2013.01.014" target="_blank" >http://dx.doi.org/10.1016/j.ijplas.2013.01.014</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1016/j.ijplas.2013.01.014" target="_blank" >10.1016/j.ijplas.2013.01.014</a>

Result language
angličtina
Original language name
Dislocation motion in tungsten: Atomistic input to discrete dislocation simulations
Original language description
A computational framework for the discrete dislocation dynamics simulation of body-centered cubic (bcc) metals which incorporates atomistic simulation results is developed here on the example of tungsten. Mobility rules for the a/2h111i screw dislocations are based on the kink-pair mechanism. The fundamental physical quantity controlling the kink-pair nucleation, the stress-dependent activation enthalpy, is obtained by fitting the line-tension model to atomistic data extending the approach by Gröger etal. (2008a,b) and Gröger and Vitek (2008c). In agreement with atomistic simulation, kink-pair nucleation is assumed to occur only on f110g planes. It is demonstrated that slip of the crystal along high-index planes like f112g which is often observed in experiments is obtained by the glide of the dislocation on two or more f110g planes. It is shown that such an atomistic based description of the dislocation mobility provides a physical basis to naturally explain many experimentally observ
Czech name
—
Czech description
—

Type
J<sub>x</sub> - Unclassified - Peer-reviewed scientific article (Jimp, Jsc and Jost)
CEP classification
BM - Solid-state physics and magnetism
OECD FORD branch
—

Project
Result was created during the realization of more than one project. More information in the Projects tab.
Continuities
I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Publication year
2013
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Similar results(10)