This specialized array of tools facilitates a non-destructive examination method used to detect surface and near-surface discontinuities in ferromagnetic materials. This inspection technique relies on the principle of magnetic flux leakage and the attraction of magnetic particles to areas of flux leakage caused by flaws. A common implementation involves a yoke, which induces a magnetic field within the test specimen. When a defect is present, it disrupts the magnetic field, creating poles at the defect location. Finely divided magnetic particles, either dry or suspended in a liquid carrier, are then applied to the surface. These particles are drawn to the magnetic poles at the defect, visually indicating its presence.
The utilization of this methodology is crucial in ensuring the structural integrity of various components across numerous industries, including aerospace, automotive, and manufacturing. It provides a relatively inexpensive and rapid method for identifying cracks, seams, and other imperfections that could lead to catastrophic failures. Its application, dating back to early 20th-century methods, continues to evolve with technological advancements, leading to increased sensitivity and portability of the implements used.
