Thermographic detection of surface breaking defects using a scanning laser source

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

Research output: Contribution to journalArticle

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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.
LanguageEnglish
Pages589-596
Number of pages8
JournalNDT and E International
Volume44
Issue number7
DOIs
StatusPublished - Nov 2011

Fingerprint

Light sources
Scanning
Defects
scanning
Lasers
defects
lasers
heat
Stainless Steel
Aluminum
emissivity
marking
stainless steels
Deposits
Stainless steel
Cameras
deposits
cameras
Infrared radiation
aluminum

Cite this

Thermographic detection of surface breaking defects using a scanning laser source. / Burrows, S E; Dixon, S; Pickering, Simon G; Li, T; Almond, Darryl P.

In: NDT and E International, Vol. 44, No. 7, 11.2011, p. 589-596.

Research output: Contribution to journalArticle

Burrows, S E ; Dixon, S ; Pickering, Simon G ; Li, T ; Almond, Darryl P. / Thermographic detection of surface breaking defects using a scanning laser source. In: NDT and E International. 2011 ; Vol. 44, No. 7. pp. 589-596
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