Magnetic non-destructive materials characterization of nonferromagnetic materials using magnetic susceptibility.

摘要

All materials interact with an external magnetic field to some extent quantified by the magnetic susceptibility c. There is a correlation between local c value and local anomalies of material composition, deformation and stress, which makes it interesting to explore related sensor principles with a potential for NDT application. This contribution however concerns a modification over the magnetic force based sensor for laterally resolved susceptibility measurement and demonstrates the possible range of NDT applications on different non-ferromagnetic material samples. This sensor however eliminates the use of cantilever to avoid possible vibrations in the industrial environment.