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Metoda magnetyczna jako narzędzie oceny jakości warstwy wierzchniej po szlifowaniu.

Blachnio J.

Zagadnienia Eksploatacji Maszyn

1998

Vol. 33, nr 1

23-34

The paper deals with possibilities of applying the magnetic method based on the Barkhausen effect to estimate quality of surface layers of turbine's compressor blades after grinding. The Barkhausen phenomenon is closely related to the process of magnetizing ferromagnetic materials. Due to the relationship between the Barkhausen phenomenon (also called the Barkhausen noise) and microtstructure, residual stress, chemical composition etc. of ferromagnetic materials, this phenomenon seems to be a useful tool supposed to find its applications in materials engineering, in particular with NDT methods. What has been shown are results of detecting flaws in the form of grinding burns with methods used up to the present and with the magnetic method. It has been proved that the method used up to the present can be replaced with a non-destructive magnetic method to successfully detect changes in microstructures, hardness and residual stresses.