Detail publikace
Cyklicky vyvolané změny mikrostruktury
FIALA, J. MAZAL, P. KOLEGA, M.
Český název
Cyklicky vyvolané změny mikrostruktury
Anglický název
Cycle induced microstructural changes
Typ
článek v časopise - ostatní, Jost
Jazyk
en
Originální abstrakt
The aim of this research was to look for systematic structural changes in a metal subjected to repetitive or fluctuating stress which may be used for monitoring structural degradation and estimating residual life of fatigued components. A special X-ray technique was used to this end, which consists in the examination of the number and size of individual diffraction spots. As each diffraction spot represents the diffraction image of a coherent scattering region, such an examination provides information on the architecture of dislocation network forming the interface between the coherent X-ray diffraction scattering regions. Analysis of the structure of an aluminium alloy EN-AW-6082 subjected to cyclic stress proved that the effect of cycling was first to transform an irregular dislocation distribution into cellular one. The cells of the dislocation network formed in this way coagulated and grew in size under repeated stress up to a certain number of cycles when the effect of cycling reversed and the cells gradually disintegrated.
Český abstrakt
The aim of this research was to look for systematic structural changes in a metal subjected to repetitive or fluctuating stress which may be used for monitoring structural degradation and estimating residual life of fatigued components. A special X-ray technique was used to this end, which consists in the examination of the number and size of individual diffraction spots. As each diffraction spot represents the diffraction image of a coherent scattering region, such an examination provides information on the architecture of dislocation network forming the interface between the coherent X-ray diffraction scattering regions. Analysis of the structure of an aluminium alloy EN-AW-6082 subjected to cyclic stress proved that the effect of cycling was first to transform an irregular dislocation distribution into cellular one. The cells of the dislocation network formed in this way coagulated and grew in size under repeated stress up to a certain number of cycles when the effect of cycling reversed and the cells gradually disintegrated.
Anglický abstrakt
The aim of this research was to look for systematic structural changes in a metal subjected to repetitive or fluctuating stress which may be used for monitoring structural degradation and estimating residual life of fatigued components. A special X-ray technique was used to this end, which consists in the examination of the number and size of individual diffraction spots. As each diffraction spot represents the diffraction image of a coherent scattering region, such an examination provides information on the architecture of dislocation network forming the interface between the coherent X-ray diffraction scattering regions. Analysis of the structure of an aluminium alloy EN-AW-6082 subjected to cyclic stress proved that the effect of cycling was first to transform an irregular dislocation distribution into cellular one. The cells of the dislocation network formed in this way coagulated and grew in size under repeated stress up to a certain number of cycles when the effect of cycling reversed and the cells gradually disintegrated.
Klíčová slova česky
únava, hliníkové slitiny, mikrostruktura, difrakce paprsků X, cyklické napětí, dislokační struktura, strukturální degradace
Klíčová slova anglicky
fatigue; aluminium alloys; microstructure; X-ray diffraction; cyclic stress; dislocation network; structural degradation; coherent scattering region; cellular distribution; dislocations; residual life.
Rok RIV
2011
Vydáno
03.10.2011
Nakladatel
Inderscience
Místo
Geneve
ISSN
1741-8410
Časopis
International Journal of Microstructure and Materials Properties
Ročník
6
Číslo
3/4
Strany od–do
259–272
Počet stran
14
BIBTEX
@article{BUT74811,
author="Jaroslav {Fiala} and Pavel {Mazal} and Michal {Kolega},
title="Cycle induced microstructural changes",
journal="International Journal of Microstructure and Materials Properties",
year="2011",
volume="6",
number="3/4",
month="October",
pages="259--272",
publisher="Inderscience",
address="Geneve",
issn="1741-8410"
}