Publication detail
Cycle induced microstructural changes
FIALA, J. MAZAL, P. KOLEGA, M.
Czech title
Cyklicky vyvolané změny mikrostruktury
English title
Cycle induced microstructural changes
Type
journal article - other
Language
en
Original abstract
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.
Czech abstract
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.
English abstract
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.
Keywords in Czech
únava, hliníkové slitiny, mikrostruktura, difrakce paprsků X, cyklické napětí, dislokační struktura, strukturální degradace
Keywords in English
fatigue; aluminium alloys; microstructure; X-ray diffraction; cyclic stress; dislocation network; structural degradation; coherent scattering region; cellular distribution; dislocations; residual life.
RIV year
2011
Released
03.10.2011
Publisher
Inderscience
Location
Geneve
ISSN
1741-8410
Journal
International Journal of Microstructure and Materials Properties
Volume
6
Number
3/4
Pages from–to
259–272
Pages count
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"
}