Which techniques can supplement Magnetic Particle Inspection (MPI)?

The selected answer is supported by the fact that both eddy current testing and ultrasonic testing are complementary nondestructive testing methods that can enhance the overall inspection process when used alongside Magnetic Particle Inspection (MPI).

Eddy current testing is particularly useful for detecting surface and near-surface discontinuities in conductive materials. It operates based on the principle of electromagnetic induction, creating eddy currents that can reveal flaws. This method can be very effective in cases where MPI may have limitations, such as when inspecting nonferrous materials or when the magnetization of a part could interfere with MPI results.

Ultrasonic testing, on the other hand, uses high-frequency sound waves to detect internal and surface flaws. This method is excellent for depth evaluation and can identify defects that are not accessible to surface inspections like MPI. By combining MPI with these two techniques, inspectors can achieve a more comprehensive assessment of the integrity of materials and components, ensuring better reliability and safety of products.

Utilizing these techniques together enables the detection of different types of flaws in various materials, enhancing inspection effectiveness and accuracy.