Magnetic Particle Testing
Magnetic Particle Testing is one of the basic NDT techniques with numerous applications in the industry, used for the detection of surface or and near-surface flaws.
Magnetic Particle inspection technique involves the magnetization of a component, followed by the application of ferromagnetic particles. Α discontinuity of a given size, orientation, and depth in the specimen can disrupt the normal flow of magnetic flux lines. This disruption causes the localized magnetic flux leakage necessary for the collection of detection media or particles.
The particles align along discontinuities, indicating the position of surface or near surface defects. This NDT technique is used for the inspection of welds, castings and forgings and is applicable only to ferromagnetic materials.
Magnetic Particle Testing is based on the following procedure:
- The magnetization of the component that will be inspected.
- The application of magnetic particles on the component.
- The formation of indications on the position that leakage of magnetic field occurs.
Course Content
- Principles of Magnetic Particle Inspection
- Methods of Magnetization
- Inspection and Detection of Indications
- Equipment Checks and Calibrations
- Test Procedure
- Detectability of Defects
- Standards and Specifications
- Testing Procedures
- Interpretation and Reporting
- Post Test Procedures
- Basic Production - Crude and Finished Products
- Basic Casting Production Methods - Finished Products
- Wrought Products Forming Processes
- Basic Welding Processes
- In-Service Defects
- Stress relieving/normalizing/annealing
- Extensive practical element
Responsibilities of a Magnetic Particle Testing Level 2 NDT professional:
- Select the Magnetic technique for the test method to be used
- Define the limitations of application of the testing method
- Translate NDT codes, standards, specifications and procedures into NDT instructions adapted to the actual working conditions
- Set up and verify equipment settings
- Perform and supervise tests
- Interpret and evaluate results according to applicable standards, codes, specifications or procedures;
- Prepare Magnetic Particle Testing written instructions
- Carry out and supervise all tasks at or below Level 2
- Provide guidance for personnel at or below Level 2
- Report the results of Magnetic tests
