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Use of Infrared Thermography for the Inspection of Welds in the Shop and Field – Phase II

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English


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  • Creators:
    Manuel, Michele
  • Corporate Creators:
    University of Florida (Gainesville)
  • Corporate Contributors:
    Florida. Department of Transportation. State Materials Office
  • Subject/TRT Terms:
  • Resource Type:
    Tech Report
  • Geographical Coverage:
    United States
  • Edition:
    Final Report: August 2019 – July 2023
  • Corporate Publisher:
    Florida. Department of Transportation
  • Abstract:
    The research focused on demonstrating and implementing infrared thermography nondestructive technique (IR-TNDT) methods in-service for inspecting aluminum (Al) and steel welds in complex structures. The study was applied to in-shop and mock in-field conditions. After a thorough literature review, this report presents the qualification of defect manufacturing procedures in the selected base materials, followed by sample preparation methods before infrared (IR) imaging. The work investigates the utility of the FLIR C5 and T620 cameras to produce a reliable and repeatable inspection of weld defects. The effect of applying protective coatings to the steel weld joint surface and a surface finish method applied to Al weld joints were addressed. The results illustrate that IR-TNDT is a promising non-destructive technique to identify surface-breaking defects in weld joints. However, proper defect identification is very sensitive to surface features. Quantitative destructive analysis was performed on weld joints to correlate defect geometry and location in the IR images. The FLIR T620 camera provided higher contrast and resolution imaging of surface-breaking defects than the FLIR C5 camera. It is recommended that IR-TNDT for steel and Al weld defect characterization be used concurrently with other non-destructive testing (NDT) techniques.
  • Format:
    PDF
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  • Main Document Checksum:
    urn:sha-512:832f8fe03b74b2bd700e8d467bbaf94010f1869b37a85a529a4dfa785a21d15518b39979d5c94e6a5105e8c280d4c95b8b3be0d0a2f0703d99984787b01a29cb
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  • File Type:
    Filetype[PDF - 12.74 MB ]
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