Number of the records: 1
Kinetics of dislocation emission in 3D: from the crack toward the free surface
- 1.
SYSNO ASEP 0503736 Document Type J - Journal Article R&D Document Type Journal Article Subsidiary J Článek ve WOS Title Kinetics of dislocation emission in 3D: from the crack toward the free surface Author(s) Hora, Petr (UT-L) RID, ORCID
Machová, Anna (UT-L) RID, ORCID
Červ, Jan (UT-L) RID, ORCID, SAI
Uhnáková, Alena (UT-L) RID, ORCIDNumber of authors 4 Source Title Kovové materiály. - : Ústav fyziky materiálu AV ČR, v. v. i. - : Ústav materiálov a mechaniky strojov SAV. - : Ústav materiálového výskumu SAV. - : Strojnícka fakulta STU - ISSN 0023-432X
Roč. 57, č. 2 (2019), s. 75-93Number of pages 19 s. Publication form Print - P Language eng - English Country SK - Slovakia Keywords edge crack ; dislocation emission ; free surface ; acoustic emission ; bcc iron Subject RIV BM - Solid Matter Physics ; Magnetism OECD category Materials engineering R&D Projects GA17-22615S GA ČR - Czech Science Foundation (CSF) GA17-12925S GA ČR - Czech Science Foundation (CSF) EF15_003/0000493 GA MŠMT - Ministry of Education, Youth and Sports (MEYS) Method of publishing Limited access Institutional support UT-L - RVO:61388998 UT WOS 000461279600001 EID SCOPUS 85064427368 DOI 10.4149/km_2019_1_75 Annotation The kinetics of dislocations emitted from a crack is studied via molecular dynamics (MD) in a 3D bcc iron crystal. The atomistic results show that edge dislocation segments in the middle of the crystal accelerate at the nearest vicinity of the free crystal surface. The dislocations in MD penetrate the surface layers in transonic or supersonic regimes. The possible sources for such behavior are discussed in the framework of continuum models and using stress calculations on the atomistic level. Acoustic emission patterns arising from the fast dislocation motion in MD are visualized via the local kinetic energies of individual atoms and further modeled as a moving source of the stress waves in the anisotropic continuum. Workplace Institute of Thermomechanics Contact Marie Kajprová, kajprova@it.cas.cz, Tel.: 266 053 154 ; Jana Lahovská, jaja@it.cas.cz, Tel.: 266 053 823 Year of Publishing 2020 Electronic address http://kovmat.sav.sk/issue.php?rr=57&cc=2
Number of the records: 1