About: Cracks detection in Mg alloy by electro-ultrasonic spectroscopy

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An Entity of Type : http://linked.opendata.cz/ontology/domain/vavai/Vysledek, within Data Space : linked.opendata.cz associated with source document(s)

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rdf:type	skos:Concept http://linked.opendata.cz/ontology/domain/vavai/Vysledek
rdfs:seeAlso	http://vavtest.unob.cz/registr
Description	New non-destructive testing (NDT) method is based on the effect of the ultrasonic vibrations on the electron transport in samples with macroscopic defects as cracks or defect centers affecting electrical conductivity. On the frequency given by the subtraction of exciting frequencies new intermodulation signal appears. Its value is given by electric resistance modulation by the defects and un-homogeneities in the sample structure. In our experiment we used the ultrasonic actuator with frequency fU when the period of wave is longer than the dielectric relaxation time in analyzed sample. In this case the effects of electron bunching by ultrasonic wave are negligible. The ultrasonic wave length is much larger than the electrons mean free path and the wave period is much longer than the mean free time among the electrons collision with scattering centers and defects. Then the electron transport is described by the quasi-steady state transport equation in one-electron approximation. Because of the requireme New non-destructive testing (NDT) method is based on the effect of the ultrasonic vibrations on the electron transport in samples with macroscopic defects as cracks or defect centers affecting electrical conductivity. On the frequency given by the subtraction of exciting frequencies new intermodulation signal appears. Its value is given by electric resistance modulation by the defects and un-homogeneities in the sample structure. In our experiment we used the ultrasonic actuator with frequency fU when the period of wave is longer than the dielectric relaxation time in analyzed sample. In this case the effects of electron bunching by ultrasonic wave are negligible. The ultrasonic wave length is much larger than the electrons mean free path and the wave period is much longer than the mean free time among the electrons collision with scattering centers and defects. Then the electron transport is described by the quasi-steady state transport equation in one-electron approximation. Because of the requireme (en)
Title	Cracks detection in Mg alloy by electro-ultrasonic spectroscopy Cracks detection in Mg alloy by electro-ultrasonic spectroscopy (en)
skos:prefLabel	Cracks detection in Mg alloy by electro-ultrasonic spectroscopy Cracks detection in Mg alloy by electro-ultrasonic spectroscopy (en)
skos:notation	RIV/60162694:G43__/11:00499055!RIV14-MO0-G43_____
http://linked.open...avai/riv/aktivita	I P Z
http://linked.open...avai/riv/aktivity	I, P(GA106/07/1393), Z(MSM0021630503)
http://linked.open...iv/cisloPeriodika	1
http://linked.open...vai/riv/dodaniDat	2014
http://linked.open...aciTvurceVysledku	Hájek, Karel
http://linked.open.../riv/druhVysledku	J - Článek v odborném periodiku
http://linked.open...iv/duvernostUdaju	S - Úplné a pravdivé údaje nepodléhající ochraně podle zvláštních právních předpisů
http://linked.open...titaPredkladatele	Ministerstvo obrany / Univerzita obrany - Fakulta vojenských technologií Brno
http://linked.open...dnocenehoVysledku	192177
http://linked.open...ai/riv/idVysledku	RIV/60162694:G43__/11:00499055
http://linked.open...riv/jazykVysledku	eng - angličtina
http://linked.open.../riv/klicovaSlova	NDT; spectroscopy; resistance change; crack geometry change (en)
http://linked.open.../riv/klicoveSlovo	NDT crack geometry change resistance change spectroscopy
http://linked.open...odStatuVydavatele	CH - Švýcarská konfederace
http://linked.open...ontrolniKodProRIV	[803CD53C4E5F]
http://linked.open...i/riv/nazevZdroje	Key Engineering Materials
http://linked.open...in/vavai/riv/obor	KA
http://linked.open...ichTvurcuVysledku	1 (xsd:int)
http://linked.open...cetTvurcuVysledku	5 (xsd:int)
http://linked.open...vavai/riv/projekt	Nonlinear ultrasonic spectroscopy of magnesium metallic composits and alloys
http://linked.open...UplatneniVysledku	2011
http://linked.open...v/svazekPeriodika	465
http://linked.open...iv/tvurceVysledku	Bumbálek, Leoš Hájek, Karel Tofel, Pavel Trojanová, Zuzana Šikula, Josef
http://linked.open...n/vavai/riv/zamer	Nové trendy v mikroelektronických systémech a nanotechnologiích (MIKROSYN)
issn	1662-9795
number of pages	4 (xsd:int)
http://localhost/t...ganizacniJednotka	G43

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