3D Discrete Dislocation Dynamics: Influence of Segment Mobility on Critical Shear Stress

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68081723%3A_____%2F15%3A00451515" target="_blank" >RIV/68081723:_____/15:00451515 - isvavai.cz</a>

Result on the web

<a href="http://dx.doi.org/10.12693/APhysPolA.128.654" target="_blank" >http://dx.doi.org/10.12693/APhysPolA.128.654</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.12693/APhysPolA.128.654" target="_blank" >10.12693/APhysPolA.128.654</a>

Result language

angličtina

Original language name

3D Discrete Dislocation Dynamics: Influence of Segment Mobility on Critical Shear Stress

Original language description

We use 3D discrete dislocation dynamics technique to study a low-angle tilt boundary migration subjected to applied shear stress at high temperatures, where di usion signi cantly contributes to the dislocation motion. The model considers Peach Koehler forces due to interactions between individual straight dislocation segments. The model also addresses dislocation plasticity in a eld of impenetrable incoherent spherical precipitates. Velocities of the individual dislocation segments are calculated in relation to the crystallography of the material. Several calculation series have been carried out for di erent velocity and driving force relations. The results show that there exists a critical applied shear stress, below which the low angle dislocation boundary cannot surpass the rigid precipitates and remains in an equilibrium con guration. This agrees with experimental results obtained in creep tests of dispersion strengthened alloys. The critical stresses have been calculated also for

Czech name

—

Czech description

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Type

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

CEP classification

JG - Metallurgy, metal materials

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

2015

Confidentiality

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

Name of the periodical

Acta Physica Polonica. A

ISSN

0587-4246

e-ISSN

—

Volume of the periodical

128

Issue of the periodical within the volume

4

Country of publishing house

PL - POLAND

Number of pages

3

Pages from-to

654-656

UT code for WoS article

000366357300046

EID of the result in the Scopus database

2-s2.0-84950284309