Effects of solutes on dislocation nucleation and interface sliding of bimetal semi-coherent interface

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61989100%3A27740%2F20%3A10245158" target="_blank" >RIV/61989100:27740/20:10245158 - isvavai.cz</a>

Výsledek na webu

<a href="https://www.sciencedirect.com/science/article/pii/S0749641919307788" target="_blank" >https://www.sciencedirect.com/science/article/pii/S0749641919307788</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.ijplas.2020.102725" target="_blank" >10.1016/j.ijplas.2020.102725</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Effects of solutes on dislocation nucleation and interface sliding of bimetal semi-coherent interface

Popis výsledku v původním jazyce

Misfit dislocations at bimetal interfaces play a key role in interface-induced deformation mechanism, which in turn determines the strengthening and softening at different length scales. Although a variety of interfaces have been explored to reveal distinct misfit dislocations and resultant deformation mechanisms, an ideal clean bimetal interface model without any solute atoms is generally assumed in modeling and simulations. Taking bimetal semi-coherent Cu(111)//(111)Ag interface as an illustration, we reveal that solute segregation at the interface could change the underlying mechanism of interface-facilitated dislocation nucleation and interface sliding. In contrary to the clean interface, the energy barrier is much lower for dislocation nucleation at compositionally diffused interfaces due to the appearance of more preferable nucleation sites at the boundaries of solute clusters than those around the nodes of misfit dislocations. We also find that solutes may modify the preferred slip systems via the formation of more complicated distribution of localized shearing regions. Further exploration of the solute effect on the resistance of interface sliding indicates that the solute segregation may also provide a strong barrier for the relative sliding between two constituent metals and change the pathway of sliding via the strong interaction between solute clusters and intersection nodes of misfit dislocations. Our results provide a foundation and emphasize the necessity to include the effect of solutes on the plastic deformation of bimetal interfaces in understanding the interface-dominated plasticity in a more realistic way. (C) 2020 Published by Elsevier Ltd.

Název v anglickém jazyce

Effects of solutes on dislocation nucleation and interface sliding of bimetal semi-coherent interface

Popis výsledku anglicky

Misfit dislocations at bimetal interfaces play a key role in interface-induced deformation mechanism, which in turn determines the strengthening and softening at different length scales. Although a variety of interfaces have been explored to reveal distinct misfit dislocations and resultant deformation mechanisms, an ideal clean bimetal interface model without any solute atoms is generally assumed in modeling and simulations. Taking bimetal semi-coherent Cu(111)//(111)Ag interface as an illustration, we reveal that solute segregation at the interface could change the underlying mechanism of interface-facilitated dislocation nucleation and interface sliding. In contrary to the clean interface, the energy barrier is much lower for dislocation nucleation at compositionally diffused interfaces due to the appearance of more preferable nucleation sites at the boundaries of solute clusters than those around the nodes of misfit dislocations. We also find that solutes may modify the preferred slip systems via the formation of more complicated distribution of localized shearing regions. Further exploration of the solute effect on the resistance of interface sliding indicates that the solute segregation may also provide a strong barrier for the relative sliding between two constituent metals and change the pathway of sliding via the strong interaction between solute clusters and intersection nodes of misfit dislocations. Our results provide a foundation and emphasize the necessity to include the effect of solutes on the plastic deformation of bimetal interfaces in understanding the interface-dominated plasticity in a more realistic way. (C) 2020 Published by Elsevier Ltd.

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

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

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

131

Číslo periodika v rámci svazku

srpen 2020

Stát vydavatele periodika

US - Spojené státy americké

Počet stran výsledku

17

Strana od-do

102725

Kód UT WoS článku

000553470000010

EID výsledku v databázi Scopus

2-s2.0-85084130794