The magnetization processes have been used for years to observe mechanical or microstructural properties in ferromagnetic steel. The usual techniques rely on standard specimens, time-consuming experimental campaigns, and rejection thresholds. These demanding methods give limited satisfaction, and controllers are looking for alternative solutions.
For physical reasons, every magnetization mechanism is characterized by its specific sensitivity to a given property to be evaluated. An ideal way to monitor this property is to develop an experimental situation where the most responsive magnetization mechanism can be isolated and easily monitored.
This presentation introduces the non-destructive testing methods based on magnetization mechanisms. Then, the targeted properties, i.e., the specific information required by the industrials or non-destructive testing end-users, are described. It is followed by the magnetization mechanisms definition and their associated specific experimental situations and indicators. Finally, correlations are proposed, such as discussions and conclusions.