The defect detection capabilities of both flash and long pulse excitation thermographic non-destructive evaluation (TNDE) techniques have been obtained using an analytical expression that involves defect size and depth, thermophysical properties and the inspection systemexcitation energy. The possibility of using long pulse excitation in place of traditional flash excitation is discussed and is considered quantitatively. It has been found that long pulse TNDE becomes an effective alternative where the defect image contrast peak obtained in the flash variant of TNDE occurs at a time that approaches or is greater than a second. Images of defects in aluminum alloy, mild steel, stainless steel and carbon fiber composite obtained by both TNDE techniques are presented.
|Title of host publication||AIP Conference Proceedings|
|Publication status||Published - 2014|
|Event||40th Annual Review of Progress in Quantitative Nondestructive Evaluation, QNDE 2013, Incorporating the 10th International Conference on Barkhausen and Micro-Magnetics, ICBM 2013 - Baltimore, USA United States|
Duration: 21 Jul 2013 → 26 Jul 2013
|Conference||40th Annual Review of Progress in Quantitative Nondestructive Evaluation, QNDE 2013, Incorporating the 10th International Conference on Barkhausen and Micro-Magnetics, ICBM 2013|
|Country||USA United States|
|Period||21/07/13 → 26/07/13|