The effectiveness of defect detection in Magnetic Particle Inspection (MPI) is primarily influenced by the correct combination of particle type and magnetic field strength. This is because MPI relies on the presence of magnetic particles that are attracted to and gather around surface and near-surface defects in ferromagnetic materials.
Utilizing the appropriate type of magnetic particles is crucial as different particles exhibit varying magnetic properties, sizes, and behaviors under magnetic fields. The magnetic field strength must also be optimized for the specific component being inspected, as an insufficiently strong field may not effectively reveal defects, while an excessively strong field can lead to confusion with noise or false indications.
In combination, the right particle type and magnetic field strength enhance the likelihood of capturing an accurate representation of the defect's location and size, allowing for more reliable and effective inspections. This understanding is fundamental in the MPI process, highlighting how these two factors work synergistically to improve detection capabilities.