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

Kód výsledku v 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>

Výsledek na webu

<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>

Jazyk výsledku

angličtina

Název v původním jazyce

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

Popis výsledku v původním jazyce

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

Název v anglickém jazyce

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

Popis výsledku anglicky

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

Druh

J_x - Nezařazeno - Článek v odborném periodiku (Jimp, Jsc a Jost)

CEP obor

JG - Hutnictví, kovové materiály

OECD FORD obor

—

Projekt

Výsledek vznikl pri realizaci vícero projektů. Více informací v záložce Projekty.

Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2015

Kód důvěrnosti údajů

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

Název periodika

Acta Physica Polonica. A

ISSN

0587-4246

e-ISSN

—

Svazek periodika

128

Číslo periodika v rámci svazku

4

Stát vydavatele periodika

PL - Polská republika

Počet stran výsledku

3

Strana od-do

654-656

Kód UT WoS článku

000366357300046

EID výsledku v databázi Scopus

2-s2.0-84950284309