Thermographic detection of surface breaking defects using a scanning laser source

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

doi:10.1016/j.ndteint.2011.06.001

Thermographic detection of surface breaking defects using a scanning laser source

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

Department of Mechanical Engineering

Research output: Contribution to journal › Article › peer-review

95 Citations (SciVal)

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 language	English
Pages (from-to)	589-596
Number of pages	8
Journal	NDT and E International
Volume	44
Issue number	7
DOIs	https://doi.org/10.1016/j.ndteint.2011.06.001
Publication status	Published - Nov 2011

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10.1016/j.ndteint.2011.06.001

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title = "Thermographic detection of surface breaking defects using a scanning laser source",

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.",

author = "Burrows, \{S E\} and S Dixon and Pickering, \{Simon G\} and T Li and Almond, \{Darryl P\}",

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AU - Dixon, S

AU - Pickering, Simon G

AU - Li, T

AU - Almond, Darryl P

PY - 2011/11

Y1 - 2011/11

N2 - 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.

AB - 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.

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UR - http://dx.doi.org/10.1016/j.ndteint.2011.06.001

U2 - 10.1016/j.ndteint.2011.06.001

DO - 10.1016/j.ndteint.2011.06.001

M3 - Article

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VL - 44

SP - 589

EP - 596

JO - NDT and E International

JF - NDT and E International

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ER -

Thermographic detection of surface breaking defects using a scanning laser source

Abstract

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