Lift-off effect in high-frequency eddy current conductivity spectroscopy

Abstract

Precision eddy current measurements have been shown to be capable of characterizing the near-surface residual stress and cold work profiles in surface-treated components. To capture the peak compressive residual stress in moderately shot-peened (Almen 4–8A) nickel-base superalloys, the eddy current inspection frequency has to be as high as 50–80MHz… (More)

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