Publication detail
Onset of Microplasticity in Copper Crystal during Nanoindentation
HORNÍKOVÁ, J. ČERNÝ, M. ŠANDERA, P. POKLUDA, J.
Czech title
Onset of Microplasticity in Copper Crystal during Nanoindentation
English title
Onset of Microplasticity in Copper Crystal during Nanoindentation
Type
journal article in Web of Science
Language
en
Original abstract
The nanoindentation test in the dislocation free crystal of copper is simulated by finite element calculations coupled with ab initio calculation of ideal shear strength. The onset of microplasticity, associated with the pop-in effect identified in experimental nanoindentation tests (creation of first dislocations), is assumed to be related to the moment of achieving the value of the ideal shear strength for the copper crystal. This value also depends on the normal stress in the critical shear system in an approximately linear way, as follows from recently published first principle calculations. The calculated values of the critical shear stress (related to the ideal shear strength) lie exactly at the lower limit of the range of experimentally observed pop-ins in the copper crystal.
Czech abstract
The nanoindentation test in the dislocation free crystal of copper is simulated by finite element calculations coupled with ab initio calculation of ideal shear strength. The onset of microplasticity, associated with the pop-in effect identified in experimental nanoindentation tests (creation of first dislocations), is assumed to be related to the moment of achieving the value of the ideal shear strength for the copper crystal. This value also depends on the normal stress in the critical shear system in an approximately linear way, as follows from recently published first principle calculations. The calculated values of the critical shear stress (related to the ideal shear strength) lie exactly at the lower limit of the range of experimentally observed pop-ins in the copper crystal.
English abstract
The nanoindentation test in the dislocation free crystal of copper is simulated by finite element calculations coupled with ab initio calculation of ideal shear strength. The onset of microplasticity, associated with the pop-in effect identified in experimental nanoindentation tests (creation of first dislocations), is assumed to be related to the moment of achieving the value of the ideal shear strength for the copper crystal. This value also depends on the normal stress in the critical shear system in an approximately linear way, as follows from recently published first principle calculations. The calculated values of the critical shear stress (related to the ideal shear strength) lie exactly at the lower limit of the range of experimentally observed pop-ins in the copper crystal.
Keywords in Czech
Nanoindentation; Ab initio calculation; Ideal shear strength; Copper crystal; FEM analysis.
Keywords in English
Nanoindentation; Ab initio calculation; Ideal shear strength; Copper crystal; FEM analysis.
RIV year
2007
Released
17.07.2007
Publisher
TRANS TECH PUBLICATIONS LTD
ISSN
1013-9826
Journal
Key Engineering Materials
Volume
348-349
Number
1
Pages from–to
801–804
Pages count
4
BIBTEX
@article{BUT44099,
author="Jana {Horníková} and Miroslav {Černý} and Pavel {Šandera} and Jaroslav {Pokluda},
title="Onset of Microplasticity in Copper Crystal during Nanoindentation",
journal="Key Engineering Materials",
year="2007",
volume="348-349",
number="1",
month="July",
pages="801--804",
publisher="TRANS TECH PUBLICATIONS LTD",
issn="1013-9826"
}