Differences in defect indications of three artificially produced defects in ultrasonic inspection

Research output: Chapter in Book/Report/Conference proceedingConference article in proceedingsScientificpeer-review

Abstract

Different types of artificial defects are used for qualification of ultrasonic inspection procedures, equipment and personnel for in-service inspections of nuclear components. To reliably evaluate the performance of an inspection, the defects have to be representative enough compared to the real service-induced defects. Fatigue cracks can nowadays be produced artificially as thermal fatigue or mechanical fatigue cracks. Thermal fatigue crack production is very well controlled in matter of size and opening and those cracks are very realistic option compared to the real service-induced defects. Mechanical fatigue crack production is a well-known and widely used method and can be used to produce very realistic cracks as well. Ultrasonic indications are highly dependent on defect characteristics like roughness, crack opening, tilt and branching. This work studies the influence of different reflector properties on defect indications. Two different types of artificial defects from different manufactures are inspected with conventional ultrasonic (UT), phased array (PA) and scanning acoustic microscope (SAM) techniques. The aim of the study is to get a wider perspective on the differences in similar type of defects from different manufacturers.
Original languageEnglish
Title of host publicationBaltica IX. International Conference on Life Management and Maintenance for Power Plants
EditorsPertti Auerkari, Juha Veivo
Place of PublicationEspoo
PublisherVTT Technical Research Centre of Finland
Pages581-602
ISBN (Print)978-951-38-8025-5, 978-951-38-8026-2
Publication statusPublished - 2013
MoE publication typeA4 Article in a conference publication
EventBALTICA IX - International Conference on Life Management and Maintenance for Power Plants - Helsinki-Stockholm, Finland
Duration: 11 Jun 201313 Jun 2013

Publication series

SeriesVTT Technology
Number106
ISSN2242-1211

Conference

ConferenceBALTICA IX - International Conference on Life Management and Maintenance for Power Plants
CountryFinland
CityHelsinki-Stockholm
Period11/06/1313/06/13

Fingerprint

Inspection
Ultrasonics
Defects
Thermal fatigue
Cracks
Acoustic microscopes
Surface roughness
Personnel
Scanning
Fatigue cracks

Cite this

Koskinen, A., & Leskelä, E. (2013). Differences in defect indications of three artificially produced defects in ultrasonic inspection. In P. Auerkari, & J. Veivo (Eds.), Baltica IX. International Conference on Life Management and Maintenance for Power Plants (pp. 581-602). Espoo: VTT Technical Research Centre of Finland. VTT Technology, No. 106
Koskinen, Ari ; Leskelä, Esa. / Differences in defect indications of three artificially produced defects in ultrasonic inspection. Baltica IX. International Conference on Life Management and Maintenance for Power Plants. editor / Pertti Auerkari ; Juha Veivo. Espoo : VTT Technical Research Centre of Finland, 2013. pp. 581-602 (VTT Technology; No. 106).
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Koskinen, A & Leskelä, E 2013, Differences in defect indications of three artificially produced defects in ultrasonic inspection. in P Auerkari & J Veivo (eds), Baltica IX. International Conference on Life Management and Maintenance for Power Plants. VTT Technical Research Centre of Finland, Espoo, VTT Technology, no. 106, pp. 581-602, BALTICA IX - International Conference on Life Management and Maintenance for Power Plants, Helsinki-Stockholm, Finland, 11/06/13.

Differences in defect indications of three artificially produced defects in ultrasonic inspection. / Koskinen, Ari; Leskelä, Esa.

Baltica IX. International Conference on Life Management and Maintenance for Power Plants. ed. / Pertti Auerkari; Juha Veivo. Espoo : VTT Technical Research Centre of Finland, 2013. p. 581-602 (VTT Technology; No. 106).

Research output: Chapter in Book/Report/Conference proceedingConference article in proceedingsScientificpeer-review

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AB - Different types of artificial defects are used for qualification of ultrasonic inspection procedures, equipment and personnel for in-service inspections of nuclear components. To reliably evaluate the performance of an inspection, the defects have to be representative enough compared to the real service-induced defects. Fatigue cracks can nowadays be produced artificially as thermal fatigue or mechanical fatigue cracks. Thermal fatigue crack production is very well controlled in matter of size and opening and those cracks are very realistic option compared to the real service-induced defects. Mechanical fatigue crack production is a well-known and widely used method and can be used to produce very realistic cracks as well. Ultrasonic indications are highly dependent on defect characteristics like roughness, crack opening, tilt and branching. This work studies the influence of different reflector properties on defect indications. Two different types of artificial defects from different manufactures are inspected with conventional ultrasonic (UT), phased array (PA) and scanning acoustic microscope (SAM) techniques. The aim of the study is to get a wider perspective on the differences in similar type of defects from different manufacturers.

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Koskinen A, Leskelä E. Differences in defect indications of three artificially produced defects in ultrasonic inspection. In Auerkari P, Veivo J, editors, Baltica IX. International Conference on Life Management and Maintenance for Power Plants. Espoo: VTT Technical Research Centre of Finland. 2013. p. 581-602. (VTT Technology; No. 106).