Crack detection using induction thermography during high temperature testing

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Proceedings titleSPIE - International Society for Optical Engineering. Proceedings
ConferenceThermosense: Thermal Infrared Applications XXXV, 30 April 2013 through 1 May 2013, Baltimore, MD
Article number87050P
SubjectCrack growth curves; Detection capability; Elevated temperature; Engineering applications; Replication method; Scanning electronic microscopy; Thermo mechanical fatigues (TMF); Total fatigue lives; Crack detection; Fatigue of materials; Induction heating; Infrared devices; Infrared radiation; Inspection; Thermography (imaging); Thermography (temperature measurement); Cracks
AbstractThermo-mechanical fatigue (TMF) tests and strain to crack (SC) tests at elevated temperature are important aspects to the total fatigue life for many engineering applications. During a TMF test, crack inspections are commonly done in a disruptive manner using an acetate replication method; and post-test crack evaluations are done using both optical and scanning electronic microscopy methods. Similarly, inspections during a typical SC test are also performed in a disruptive manner. This paper demonstrates that infrared imaging can be used as an in-situ inspection approach to detect crack during TMF and SC tests at high temperature. It is also demonstrated that this technique allows for the reduction or elimination of the need for downtime that is typically required for disruptive inspection. The results obtained by induction thermography are compared to those obtained via traditional methods and post-test evaluation. The induction thermography inspections were carried out at several temperatures and showed that the temperature used during the test does not influence the crack detection capability. It is demonstrated that induction thermography can detect cracks smaller than 500 μm and has potential for monitoring and generating a crack growth curve. © 2013 SPIE.
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AffiliationNational Research Council Canada (NRC-CNRC); Aerospace (AERO-AERO)
Peer reviewedYes
NPARC number21269963
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Record identifier8d665dad-6b4e-406e-b829-b6b44a1600cb
Record created2013-12-13
Record modified2017-04-24
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