On the long-term correlations in the twinning and dislocation slip dynamics

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216208%3A11320%2F20%3A10422427" target="_blank" >RIV/00216208:11320/20:10422427 - isvavai.cz</a>

Výsledek na webu

<a href="https://verso.is.cuni.cz/pub/verso.fpl?fname=obd_publikace_handle&handle=GJRx78aNlu" target="_blank" >https://verso.is.cuni.cz/pub/verso.fpl?fname=obd_publikace_handle&handle=GJRx78aNlu</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.msea.2020.139091" target="_blank" >10.1016/j.msea.2020.139091</a>

Jazyk výsledku

angličtina

Název v původním jazyce

On the long-term correlations in the twinning and dislocation slip dynamics

Popis výsledku v původním jazyce

The present work aims at gaining new insights into the dynamics of the dislocation slip and twinning processes, which govern the majority of possible scenarios of plastic deformation in structural metals and alloys. Using model magnesium single crystals and employing the statistical analysis of acoustic emissions (AE) generated in the course of plastic deformation, it was demonstrated that twinning is a process with a memory of the past whereby the twinning events affect the occurrence of successive events. As opposes to this, the basal dislocation slip appears as a substantially random intermittent process comprising of independent elementary slip events without long-term correlations between gliding dislocations or slip bands emerging due to the collective dislocation glide along basal planes. The single crystals were chosen with axial orientations best suitable to facilitate either basal dislocation slip or tensile twinning under compressive loading, which significantly simplified the interpretations of AE findings. Besides, the AE results were fully corroborated in situ by microstructure observations using scanning electron microscopy imaging.

Název v anglickém jazyce

On the long-term correlations in the twinning and dislocation slip dynamics

Popis výsledku anglicky

The present work aims at gaining new insights into the dynamics of the dislocation slip and twinning processes, which govern the majority of possible scenarios of plastic deformation in structural metals and alloys. Using model magnesium single crystals and employing the statistical analysis of acoustic emissions (AE) generated in the course of plastic deformation, it was demonstrated that twinning is a process with a memory of the past whereby the twinning events affect the occurrence of successive events. As opposes to this, the basal dislocation slip appears as a substantially random intermittent process comprising of independent elementary slip events without long-term correlations between gliding dislocations or slip bands emerging due to the collective dislocation glide along basal planes. The single crystals were chosen with axial orientations best suitable to facilitate either basal dislocation slip or tensile twinning under compressive loading, which significantly simplified the interpretations of AE findings. Besides, the AE results were fully corroborated in situ by microstructure observations using scanning electron microscopy imaging.

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

<a href="/cs/project/GA17-21855S" target="_blank" >GA17-21855S: Vylepšení mechanických vlastností protlačovaných hořčíkových slitin pomocí termomechanického zpracování</a><br>

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

Materials Science &amp; Engineering A: Structural Materials: Properties, Microstructure and Processing

ISSN

0921-5093

e-ISSN

—

Svazek periodika

777

Číslo periodika v rámci svazku

leden

Stát vydavatele periodika

CH - Švýcarská konfederace

Počet stran výsledku

9

Strana od-do

139091

Kód UT WoS článku

000521512000028

EID výsledku v databázi Scopus

2-s2.0-85079287788