Study of Barkhausen Emission from the Surface Martensite Layer on Induction-hardened Carbon Steel

Speaker:
Hammersberg, Peter; Chalmers University of Technology; Sweden

Authors:
Hammersberg, P.; Chalmers University of Technology; Sweden
Lam Tam, P.; Chalmers University of Technology; Sweden
Persson, G.; Chalmers University of Technology; Sweden

ID: ECNDT-0583-2018
Download: PDF
Session: Magnetic Methods - Barkhausen 1
Room: R2
Date: 2018-06-11
Time: 13:30 - 13:50

Induction hardening is one of the finishing processes to improve hardness and wear resistance on steel products by developing a hard martensite-rich surface layer. Non-destructive Barkhausen noise (BN) evaluation is used for quality assurance. While the routine production is set to develop a desirable hardening depth of this specific structure, the variations of microstructure and grain size overlay the outbound results in the assessment and make the interpretation unambiguous. This work correlates the different parameters in BN-signal with the deviations from the targeted martensite by predictive, physical and numerical modelling means.