Experience in the Eddy Current Testing of Rolling Element Bearing Components

Abstract

AbstractEddy current testing is particularly suitable for non-destructive 100 % testing in the near-surface area of electrically conductive materials due to its high sensitivity, high testing speed and the possibility of easy automation. Eddy current testing is therefore frequently used, especially in safety-relevant applications such as aviation. After a short description of the basics of eddy current testing, this paper reports on experiences with the testing of rolling element bearing components for engine bearings by means of eddy current. The advantages of the multi-frequency method in material mix-up testing and estimation of the retained austenite content are clearly shown. It is also shown, however, that in particular cases material-typical properties can lead to sham indications.