Explanation should include
- inspecting only the ferromagnetic materials (iron and steel) to detect cracks, splits, voids, pipes, and cold shunts below the surface
- using the fixed or portable magnetic particle unit
- magnetizing a part
- covering a part with a test medium containing ferromagnetic particles
- using either the immersion, spraying, or pouring method
- inspecting parts for defects on surface or subsurface, such as when
- north and south poles form across defects
- magnetic particles collect between poles
- a pattern forms in the approximate size and shape of the defect
- demagnetizing parts.
ACS:
AM.I.K.R1
Process/Skill Questions:
- How does one demagnetize aircraft parts following a magnetic particle inspection?
- What defects can be discovered with magnetic particle inspection?
- What is the difference between circular magnetization and longitudinal magnetization?