Single crystal yield criterion for chromium based on atomisticnstudies of isolated 1/2[111] screw dislocations

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68081723%3A_____%2F20%3A00531191" target="_blank" >RIV/68081723:_____/20:00531191 - isvavai.cz</a>

Výsledek na webu

<a href="https://www.sciencedirect.com/science/article/pii/S0749641919308940?via%3Dihub" target="_blank" >https://www.sciencedirect.com/science/article/pii/S0749641919308940?via%3Dihub</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.ijplas.2020.102733" target="_blank" >10.1016/j.ijplas.2020.102733</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Single crystal yield criterion for chromium based on atomisticnstudies of isolated 1/2[111] screw dislocations

Popis výsledku v původním jazyce

Using the recently developed Bond Order Potential for Cr, we investigate the mobility of isolatedn1/2[111] screw dislocations under stress at 0 K. These studies provide the dependence of thencritical resolved shear stress (i.e., the Peierls stress) on the orientation of the maximum resolvednshear stress plane and on the shear stress perpendicular to the slip direction. Similar studies arenmade for loading in tension and compression to show that the onset of yielding in Cr singlencrystals can be described using a combination of the shear stresses parallel and perpendicular tonthe slip direction. Based on these results, we develop a single crystal yield criterion for Cr thatnincludes all non-Schmid contributions to the Peierls stress. This criterion is used to predict thenshape of the yield surface and compare it with the regular Tresca’s hexagon arising from thenSchmid law. For all directions of uniaxial load, the criterion is used to quantify the character andnmagnitude of the tension-compression asymmetry

Název v anglickém jazyce

Single crystal yield criterion for chromium based on atomisticnstudies of isolated 1/2[111] screw dislocations

Popis výsledku anglicky

Using the recently developed Bond Order Potential for Cr, we investigate the mobility of isolatedn1/2[111] screw dislocations under stress at 0 K. These studies provide the dependence of thencritical resolved shear stress (i.e., the Peierls stress) on the orientation of the maximum resolvednshear stress plane and on the shear stress perpendicular to the slip direction. Similar studies arenmade for loading in tension and compression to show that the onset of yielding in Cr singlencrystals can be described using a combination of the shear stresses parallel and perpendicular tonthe slip direction. Based on these results, we develop a single crystal yield criterion for Cr thatnincludes all non-Schmid contributions to the Peierls stress. This criterion is used to predict thenshape of the yield surface and compare it with the regular Tresca’s hexagon arising from thenSchmid law. For all directions of uniaxial load, the criterion is used to quantify the character andnmagnitude of the tension-compression asymmetry

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

10302 - Condensed matter physics (including formerly solid state physics, supercond.)

Projekt

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

Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2020

Kód důvěrnosti údajů

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

Název periodika

International Journal of Plasticity

ISSN

0749-6419

e-ISSN

—

Svazek periodika

132

Číslo periodika v rámci svazku

SEP

Stát vydavatele periodika

GB - Spojené království Velké Británie a Severního Irska

Počet stran výsledku

12

Strana od-do

102733

Kód UT WoS článku

000553471300006

EID výsledku v databázi Scopus

2-s2.0-85086648167