Magnetic Particle Test (Leaving Cert Engineering): Flashcards
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What is magnetic particle testing (MPT)?
What is magnetic particle testing (MPT)?
Non-destructive test for surface and near-surface defects in ferromagnetic materials
What materials can be tested with MPT?
What materials can be tested with MPT?
Ferromagnetic materials only
Examples of ferromagnetic materials
Examples of ferromagnetic materials
Iron, steel, and nickel
How does MPT detect defects?
How does MPT detect defects?
Defects disrupt the magnetic field pattern
What particles are used in MPT?
What particles are used in MPT?
Fine iron filings or magnetic dust
How do defects appear in MPT?
How do defects appear in MPT?
As clusters or lines of iron particles
What equipment creates the magnetic field in MPT?
What equipment creates the magnetic field in MPT?
Electromagnetic yoke
Material limitation of MPT
Material limitation of MPT
Only works on ferromagnetic materials
Surface requirement for MPT
Surface requirement for MPT
Clean surfaces free from paint, rust, or oil
Depth limitation of MPT
Depth limitation of MPT
Cannot detect deep internal flaws
Speed advantage of MPT
Speed advantage of MPT
Results visible immediately
Detection sensitivity of MPT
Detection sensitivity of MPT
Can find very small surface and near-surface cracks
MPT use in engine blocks
MPT use in engine blocks
Checking for cracks that cause coolant or oil leaks