Interactions of prismatic dislocation loops with free surfaces in thin foils of body-centered cubic iron

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68081723%3A_____%2F15%3A00449023" target="_blank" >RIV/68081723:_____/15:00449023 - isvavai.cz</a>

Result on the web

<a href="http://dx.doi.org/10.1016/j.actamat.2015.07.077" target="_blank" >http://dx.doi.org/10.1016/j.actamat.2015.07.077</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.actamat.2015.07.077" target="_blank" >10.1016/j.actamat.2015.07.077</a>

Result language

angličtina

Original language name

Interactions of prismatic dislocation loops with free surfaces in thin foils of body-centered cubic iron

Original language description

We employ molecular statics simulations to investigate the interactions of circular and hexagonal 1/2<111> prismatic loops in body-centered cubic iron with two parallel {111} free surfaces of a free-standing foil. If the presence of two surfaces is takeninto account, these results agree well with the isotropic elastic solutions of Bastecka (1964) for circular loops and of Groves and Bacon (1970) for square loops with the Burgers vector of the loop perpendicular to the surface. By varying the size and shape of the loop, we identify the critical depth at which the image stresses overcome the internal lattice friction and thus drive the loop towards the surface. We investigate how this depth and the corresponding critical stress on the dislocation dependon the shape and size of the loop and outline how these results can be used to correct transmission electron microscope (TEM) measurements of the densities of prismatic dislocation loops in thin foils. For example, for the loops of 5 nm

Czech name

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Czech description

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Type

J_x - Unclassified - Peer-reviewed scientific article (Jimp, Jsc and Jost)

CEP classification

BM - Solid-state physics and magnetism

OECD FORD branch

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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

2015

Confidentiality

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

Name of the periodical

Acta Materialia

ISSN

1359-6454

e-ISSN

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Volume of the periodical

99

Issue of the periodical within the volume

OCT

Country of publishing house

GB - UNITED KINGDOM

Number of pages

10

Pages from-to

392-401

UT code for WoS article

000362145400040

EID of the result in the Scopus database

2-s2.0-84940506145