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Detection of Surface Cracks in Welds using Active Thermography
University West, Department of Engineering Science, Division of Process and Product Development. (PTW)ORCID iD: 0000-0001-7748-0565
University West, Department of Engineering Science, Division of Process and Product Development. (PTW)ORCID iD: 0000-0001-6933-375X
2012 (English)In: Proceedings18th World Conference on Non-Destructive Testing: 16 - 20 April 2012, Durban, South Africa, South African Institute for Non-Destructive Testing (SAINT) , 2012, p. 1-5Conference paper, Published paper (Refereed)
Abstract [en]

Surface cracks in welds can be detected using several non-destructive testing methods; among the more popular ones are eddy current, penetrant and magnetic particle testing. For an automatic inspection cell, the traditional techniques have limitations. Here we have investigated the possibility of using active thermography for detecting surface cracks in welds. This technique features advantages such as non-contact and high speed. The weld is illuminated using an infrared light source. Due to higher energy absorption in a surface crack, the defect will be identified as a hot spot when imaged by an infrared camera. Artificial weld defects (notches) are investigated by use of active thermography. Results from an inspection of real longitudinal cold cracks in a weld are also presented. The results show that active thermography looks promising for detection of even small cracks and notches, as long as they are open to the surface.

Place, publisher, year, edition, pages
South African Institute for Non-Destructive Testing (SAINT) , 2012. p. 1-5
Keywords [en]
thermography, surface cracks, welding, infrared, automated inspection
National Category
Manufacturing, Surface and Joining Technology
Research subject
Production Technology
Identifiers
URN: urn:nbn:se:hv:diva-4141ISBN: 978-0-620-52872-6 (electronic)OAI: oai:DiVA.org:hv-4141DiVA, id: diva2:517411
Conference
18th World Conference on Non-Destructive Testing 16 - 20 April 2012, Durban, South Africa
Available from: 2012-04-23 Created: 2012-02-10 Last updated: 2018-08-09Bibliographically approved

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Broberg, PatrikRunnemalm, Anna

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CiteExportLink to record
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Citation style
  • apa
  • ieee
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  • de-DE
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Output format
  • html
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