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Acoustic emission from fast dislocations in 3d bcc iron crystals

SYSNO ASEP	0497953
Document Type	A - Abstract
R&D Document Type	O - Ostatní
Title	Acoustic emission from fast dislocations in 3d bcc iron crystals
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, ORCID}
Number of authors	4
Source Title	Advanced Modelling of Wave Propagation in Solids, book of abstracts. - Praha : Institute of Thermomechanics, Czech Academy of Sciences, 2018 / Kolman R. ; Berezovski A. ; Kruisová A. - ISBN 978-80-87012-67-3 S. 59
Number of pages	2 s.
Publication form	Print - P
Action	International Conference on Advanced Modelling of Wave Propagation in Solids /2./
Event date	17.09.2018 - 21.09.2018
VEvent location	Praha
Country	CZ - Czech Republic
Event type	WRD
Language	eng - English
Country	CZ - Czech Republic
Keywords	acoustic emission ; dislocations ; molecular dynamics
Subject RIV	BI - Acoustics
OECD category	Materials engineering
R&D Projects	EF15_003/0000493 GA MŠMT - Ministry of Education, Youth and Sports (MEYS)
	GA17-22615S GA ČR - Czech Science Foundation (CSF)
	GA17-12925S GA ČR - Czech Science Foundation (CSF)
Institutional support	UT-L - RVO:61388998
Annotation	Acoustic emission and kinetics of dislocations emitted from a crack is studied via molecular dynamics (MD) utilizing nonlinear interatomic forces, [1] and [2]. 3D results indicate that edge dislocation segments in the middle of the crystal at the free sample surface can accelerate. The dislocations in MD penetrate the free surface in transonic or supersonic regime. Possible sources for such behaviour are discussed in the framework of continuum models. MD results comply with recent continuum analysis [3] of surface waves in anisotropic medium where supersonic regime of wave propagation at the free surface can exist unlike isotropic 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	2019

Number of the records: 1