Magnetic particle testing
Magnetic particle testing is a test method used globally to detect surface discontinuities. Parts can be locally or fully inspected. MT is dedicated to ferritic steel, and can be performed manually in situ during maintenance (MRO), or automated close to a manufacturing line (OEM).
How does MT work? The part is magnetized and iron particles applied to the surface. Discontinuities affect the flow of the magnetic field, causing the applied particles to gather at locations of flux leakage, producing a visible indication of the irregularity on the surface.