Magnetic Particle Testing (MT) is the inspection process designed to detect surface and near subsurface discontinuities of ferromagnetic materials. This method is very useful and wildly used in many applications such as welded fabrications, casting, and more.
Magnetic Particle Testing Processes
For this process, the inspected area is magnetized by the use of yoke then ferromagnetic particles are applied. If the discontinuities are found, the line of magnetic particles will be seen around the defects.
Advantages of Magnetic Particle Testing Method
Can detect both surface and near sub-surface defects
Can detect very small defects
Fast process with immediate results
Indications are visible directly on the part surface
Can inspect parts with complex shapes
Limitations of Magnetic Particle Testing Method
Parts inspected need to be ferromagnetic
Some parts need to be demagnetized after the inspection
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