Numerical simulations and experimental investigation of laser hardening depth investigation via 3MA-eddy current technique

•Hardening depth investigation via 3MA- multi frequency eddy current method.•Mechanical hardness profile characterization and magnetic characterization.•Multi-layer FEM simulation approach is used for validation of the NDT signature.•Skin depth is accurately defined via FEM simulation and NDT eddy c...

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Bibliographic Details
Published in:Journal of magnetism and magnetic materials 2022-05, Vol.550, p.169046, Article 169046
Main Authors: Sidi-Ahmed, K., Maouche, B., Gabi, Y., Alloui, L., Straß, B., Wolter, B., Feliachi, M.
Format: Article
Language:English
Subjects:
Computer simulation
Eddy current
Eddy currents
Finite element modelling
Inspection
Laser beam hardening
Lasers
Magnetic characterization
Magnetic properties
Mathematical models
Non destructive evaluation
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Summary:•Hardening depth investigation via 3MA- multi frequency eddy current method.•Mechanical hardness profile characterization and magnetic characterization.•Multi-layer FEM simulation approach is used for validation of the NDT signature.•Skin depth is accurately defined via FEM simulation and NDT eddy current experiment. This paper discusses laser hardening depth inspection via the industrial 3MA- eddy current module by combining numerical modeling and experiments. The hardening treatment process leads to difference in microstructure from the surface to the bulk, which engenders various signatures in the eddy current signals, using single frequency Eddy current excitation, it is possible to define a link between the measured quantities and laser hardening depth. The results of finite element simulations confirms that the obtained signals are intrinsically linked to the magnetic properties of the specimen material. From the profile of the eddy current signals versus laser hardening depth, the skin depth is accurately evaluated at the indicated frequency.
ISSN:0304-8853
1873-4766
DOI:10.1016/j.jmmm.2022.169046