Review of Literature on Probability of Detection for Magnetic Particle Nondestructive Testing
DEFENSE SCIENCE AND TECHNOLOGY ORGANIZATION VICTORIA (AUSTRALIA) MARITIME PLATFORMS DIV
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A critical review of the available literature concerning the minimum reliably detectable defect size aNDI for magnetic particle testing MPT in aerospace applications is presented. Four probability of detection POD studies relevant to detection of fatigue cracks in aircraft components were found over the period 1968 to 2011. As the statistical methods used in these four previous studies were either outdated or otherwise deficient, the original data were reanalysed using currently accepted techniques. A meta-analysis of the results is presented, with emphasis on statistical inferences for the defect size expected to be detected with 90 POD. It is shown that the minimum reliably detectable defect size aNDI 2.0 mm currently specified by the Royal Australian Air Force for wet fluorescent magnetic particle inspection using the continuous method is consistent with estimates of the average performance of MPT derived from the reanalysis of the literature.