Introduction
Magnetic particle testing is:
1. Cost effective.
2. Simple.
3. Fast.
4. The most reliable nondestructive testing method for detecting surface and near-surface discontinuities.
5. Able to detect discontinuities in ferromagnetic materials that are not open to the surface.
6. An easier method in terms of cleaning than liquid penetrant testing.
Capabilities of Magnetic Particle Testing
1. Will detect discontinuities through smeared metal.
2. The discontinuity does not have to be completely dry.
3. Discontinuities disrupt the magnetic flux field and small magnetic particles will form a visual indication
of the discontinuity.
Magnets and Magnetic Fields
1. Permanent magnets.
2. Directly induced by current flow.
a. Head shot.
b. Prods.
3. Indirectly induced with no electrical contact.
a. Central conductor.
b. Coil.
c. Yoke.
d. Wrapped cables.
1
Principles of Magnetic Particle Testing
Lesson 1
Magnetic particle testing is:
1. Cost effective.
2. Simple.
3. Fast.
4. The most reliable nondestructive testing method for detecting surface and near-surface discontinuities.
5. Able to detect discontinuities in ferromagnetic materials that are not open to the surface.
6. An easier method in terms of cleaning than liquid penetrant testing.
Capabilities of Magnetic Particle Testing
1. Will detect discontinuities through smeared metal.
2. The discontinuity does not have to be completely dry.
3. Discontinuities disrupt the magnetic flux field and small magnetic particles will form a visual indication
of the discontinuity.
Magnets and Magnetic Fields
1. Permanent magnets.
2. Directly induced by current flow.
a. Head shot.
b. Prods.
3. Indirectly induced with no electrical contact.
a. Central conductor.
b. Coil.
c. Yoke.
d. Wrapped cables.
1
Principles of Magnetic Particle Testing
Lesson 1