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

Result code in 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>

Result on the web

<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>

Result language

angličtina

Original language name

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

Original language description

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.

Czech name

—

Czech description

—

Type

J_imp - Article in a specialist periodical, which is included in the Web of Science database

CEP classification

—

OECD FORD branch

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

Project

<a href="/en/project/GA17-21855S" target="_blank" >GA17-21855S: Enhancement of mechanical properties of extruded magnesium alloys via thermo-mechanical treatment</a><br>

Continuities

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

Publication year

2020

Confidentiality

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

Name of the periodical

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

ISSN

0921-5093

e-ISSN

—

Volume of the periodical

777

Issue of the periodical within the volume

leden

Country of publishing house

CH - SWITZERLAND

Number of pages

9

Pages from-to

139091

UT code for WoS article

000521512000028

EID of the result in the Scopus database

2-s2.0-85079287788