Uniqueness and stability of activated dislocation shapes in crystals

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68081723%3A_____%2F21%3A00545719" target="_blank" >RIV/68081723:_____/21:00545719 - isvavai.cz</a>

Alternative codes found

RIV/00216305:26210/21:PU139373

Result on the web

<a href="https://iopscience.iop.org/article/10.1088/1361-651X/abd041" target="_blank" >https://iopscience.iop.org/article/10.1088/1361-651X/abd041</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1088/1361-651X/abd041" target="_blank" >10.1088/1361-651X/abd041</a>

Result language

angličtina

Original language name

Uniqueness and stability of activated dislocation shapes in crystals

Original language description

Simplified models of thermally activated dislocation glide constitute an important link between atomic-level studies of isolated dislocations and macroscopic thermodynamic properties of materials. These models rest upon the activation enthalpy, which is the energy to transform an initially straight dislocation into its activated state at finite applied stresses. Minimizing this activation enthalpy leads to a boundary value problem for the shape of the dislocation line. Besides two constant solutions corresponding to a straight dislocation in its stable and unstable states at the applied stress, there exist an infinite number of non-constant solutions. We investigate the characters of these solutions for dislocations anchored at their ends. Using the second variation of the activation enthalpy, we derive a set of conditions that define a unique activated state of the dislocation. The corresponding analysis demonstrates that the shape of the dislocation in this activated state must change with the applied stress to maintain the state of minimum activation enthalpy.

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

10102 - Applied mathematics

Project

<a href="/en/project/LQ1601" target="_blank" >LQ1601: CEITEC 2020</a><br>

Continuities

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

Publication year

2021

Confidentiality

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

Name of the periodical

Modelling and Simulation in Materials Science and Engineering

ISSN

0965-0393

e-ISSN

1361-651X

Volume of the periodical

29

Issue of the periodical within the volume

2

Country of publishing house

GB - UNITED KINGDOM

Number of pages

13

Pages from-to

025006

UT code for WoS article

000615217900001

EID of the result in the Scopus database

2-s2.0-85101842742