Datum
2022-12-28Schlagwort
600 Technik 620 Ingenieurwissenschaften EdelstahlKorrosionInduktionShearing-InterferometrieMetadata
Zur Langanzeige
Aufsatz
Shearographic Detection of Internal Defects in Austenitic Stainless Steels
Zusammenfassung
Despite the formation of a passive layer, corrosion also occurs in austenitic stainless steels. One of the most common and most dangerous types is pitting corrosion, in which the material beneath the surface is completely dissolved. Since this type of corrosion only produces small holes on the surface, it is difficult to detect without nondestructive testing. This paper presents induction-excited shearography as an optical, nondestructive testing method for quick inspection of inner defects and corrosion. The investigations were carried out on test specimens with blind holes made of austenitic stainless steel 1.4301 (AISI 304). The detection limits of different defect sizes were determined objectively based on the signal-to-noise ratio (SNR). The results show that inner defects with a size of Ø 2 mm can be detected via SNR in a depth of up to 1.5 mm. Larger defects can be detected in greater depth. The data obtained were validated on real test specimens. The measurement of a more realistic defect geometry showed higher SNR values compared to the idealized test specimens. From the measured SNR values of realistic defect geometry, it can be concluded that real irregularities have higher SNR values than defects with flat bottoms. The results show that induction-excited shearography is suitable for the nondestructive testing of austenitic stainless steels.
Zitierform
In: Metals Volume 13 / Issue 1 (2022-12-28) eissn:1996-1944Förderhinweis
Gefördert durch den Publikationsfonds der Universität KasselZitieren
@article{doi:10.17170/kobra-202301177393,
author={Kryukov, Igor and Prints, Eugen and Sommer, Niklas and Böhm, Stefan},
title={Shearographic Detection of Internal Defects in Austenitic Stainless Steels},
journal={Metals},
year={2022}
}
0500 Oax 0501 Text $btxt$2rdacontent 0502 Computermedien $bc$2rdacarrier 1100 2022$n2022 1500 1/eng 2050 ##0##http://hdl.handle.net/123456789/14370 3000 Kryukov, Igor 3010 Prints, Eugen 3010 Sommer, Niklas 3010 Böhm, Stefan 4000 Shearographic Detection of Internal Defects in Austenitic Stainless Steels / Kryukov, Igor 4030 4060 Online-Ressource 4085 ##0##=u http://nbn-resolving.de/http://hdl.handle.net/123456789/14370=x R 4204 \$dAufsatz 4170 5550 {{Edelstahl}} 5550 {{Korrosion}} 5550 {{Induktion}} 5550 {{Shearing-Interferometrie}} 7136 ##0##http://hdl.handle.net/123456789/14370
2023-01-17T13:36:14Z 2023-01-17T13:36:14Z 2022-12-28 doi:10.17170/kobra-202301177393 http://hdl.handle.net/123456789/14370 Gefördert durch den Publikationsfonds der Universität Kassel eng Namensnennung 4.0 International http://creativecommons.org/licenses/by/4.0/ nondestructive testing shearography austenitic stainless steel induction corrosion 600 620 Shearographic Detection of Internal Defects in Austenitic Stainless Steels Aufsatz Despite the formation of a passive layer, corrosion also occurs in austenitic stainless steels. One of the most common and most dangerous types is pitting corrosion, in which the material beneath the surface is completely dissolved. Since this type of corrosion only produces small holes on the surface, it is difficult to detect without nondestructive testing. This paper presents induction-excited shearography as an optical, nondestructive testing method for quick inspection of inner defects and corrosion. The investigations were carried out on test specimens with blind holes made of austenitic stainless steel 1.4301 (AISI 304). The detection limits of different defect sizes were determined objectively based on the signal-to-noise ratio (SNR). The results show that inner defects with a size of Ø 2 mm can be detected via SNR in a depth of up to 1.5 mm. Larger defects can be detected in greater depth. The data obtained were validated on real test specimens. The measurement of a more realistic defect geometry showed higher SNR values compared to the idealized test specimens. From the measured SNR values of realistic defect geometry, it can be concluded that real irregularities have higher SNR values than defects with flat bottoms. The results show that induction-excited shearography is suitable for the nondestructive testing of austenitic stainless steels. open access Kryukov, Igor Prints, Eugen Sommer, Niklas Böhm, Stefan doi:10.3390/met13010074 Edelstahl Korrosion Induktion Shearing-Interferometrie publishedVersion eissn:1996-1944 Issue 1 Metals Volume 13 false 0074
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