We report the progress in post weld residual stress evaluation using Barkhausen effect (BE) meter with rotating magnetic field probe. The novel probe of the BE meter contains two C-core electromagnets and searching coil with ferrite antenna. This meter allows automatic measurements of BE intensity envelopes at different angles of magnetizing field. The full process of measurement at given position of the probe takes about only 30 seconds. Integrals of these envelopes and peak to peak amplitudes are calculated for each angle and finally main axis rotation are found. This novel meter allows thus very quick detection and visualisation of material anisotropy as well as of stress state. We present results of elaboration of biaxial state calibration function of BE intensity and distributions of residual stresses detected with this meter over the welded plates. Model like but-weld samples were made of two grades of steels: nearly isotropic (grade S235JR , EN 10025-2) and anisotropic (grade S460ML, EN 10025). These results make evident that this new BE meter is very suitable for quick inspection of residual stress introduced by welding process.
Authors
Additional information
- Category
- Aktywność konferencyjna
- Type
- publikacja w wydawnictwie zbiorowym recenzowanym (także w materiałach konferencyjnych)
- Language
- angielski
- Publication year
- 2014
