Thermographic detection of surface breaking defects using a scanning laser source

S E Burrows, S Dixon, Simon G Pickering, T Li, Darryl P Almond

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57 Citations (Scopus)

Abstract

Surface breaking defects are detected using a scanning laser source to deposit heat into a sample surface. Any lateral flow of heat is disturbed by such a defect, with a change in thermal spot shape being detected by an infrared camera. An apparent increase in temperature as the laser passes over a defect is due to a localised change in emissivity, allowing defects to be distinguished from surface markings. Defects have been detected in both stainless steel and aluminium.
Original languageEnglish
Pages (from-to)589-596
Number of pages8
JournalNDT and E International
Volume44
Issue number7
DOIs
Publication statusPublished - Nov 2011

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