Non-destructive characterisation of 2Cr-1Mo steel quality using magneto-acoustic emission

Summary form only given. The magneto-acoustic effect (MAE) is now intensively investigated and modelled in order to enable the application for NDE of the creep damage process. The main important feature of the MAE is that it decreases as the creep damage stage increase. This feature can be used for steel quality non-destructive assessment. We describe experiments with standard Polish 2Cr-1Mo steel at various creep damage stages in which properties of MAE were tested and compared to other magnetic properties such as hysteresis loop B(H), Barkhausen effect (HBE) and magnetostriction /spl lambda/. The creep damage stage of the samples was evaluated from microstructure analysis and mechanical properties tests. The aim of this work was to establish a correlation between observed MAE properties and magnetic properties of this steel.