The document will address the application of infrared thermography using a broad range of excitation sources. Sources to be discussed include from flash sources with duration on the millisecond time scale to longer duration heat lamps, air guns, contact heaters and electromagnetic induction devices. Both single side and through transmission approaches will be discussed. The guide will address the operating principles of thermography using these excitation methods, and offer guidelines for determining which method is appropriate for an application, and for developing a test procedure. Approaches to interpreting and processing results will also be discussed.
Thermography is frequently used as a qualitative inspection tool in aerospace NDT using a variety of excitation methods. Users include inspectors of military fixed and rotary wing aircraft in applications ranging from detection of trapped water to repair validation. While a variety of heat sources are employed, the basis for the choice of source is often arbitrary, and metrics for comparison and evaluation of alternatives have not been established. Similarly, procedures for application of the excitation (e.g. distance, duration) and interpretation of resulting data are not well established. The proposed guide will clarify the application of thermography using the full range of sources currently employed in aerospace NDT.
NDT. NDE. NDI
The title and scope are in draft form and are under development within this ASTM Committee.
Citing ASTM Standards
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