MT Level I-II (Online)

• 1.1 Theory of magnetic fields

• 1.2 Theory of magnetism

• 1.3 Terminology associatred with magnetic particle testing

• 2.1 Bar magnet

• 2.2 Ring Magnet

• 3.1 Surface cracks

• 3.2 Scratches

• 3.3 Subsurface defects

4.0 Magnetization by Means of Electric Current

• 4.1 Circular field

4.0 Magnetization by Means of Electric Current

• 4.2 Longitudinal field

• 5.1 Alloy, shape, and condition of part

• 5.2 Type of magnetizing current

• 5.3 Direction of magnetic field

• 5.4 Sequence of operations

• 5.5 Value of flux density

• 6.1 Wet particle

• 6.2 Dry particle

• 7.1 Residual magnetism

• 7.2 Reason doe requiring demagnetization

• 7.3 Longitudinal and circular residual fields

• 7.4 Basic principles of demagnetization

• 7.5 Retentivity and coercive force

• 7.6 Methods of demagnetization

8.0 MT

• 8.1 Equipment selection considerations

8.0 MT

• 8.2 Manual inspection equipment

8.0 MT

• 8.3 Medium-and heavy-duty equipment

8.0 MT

• 8.4   Stationary equipment

8.0 MT

• 8.5 Mechanized inspection equipment

• 8.5.1 Semiautomatic inspection equipment

• 8.5.2 Single-purpose semiautomatic equipment

• 8.5.3 Multipurpose semiautomatic equipment

• 8.5.4 Fully automativ equipment

• 9.1 Inclusions

• 9.2 Blowholes

• 9.3 Porosity

• 9.4 Flaskes

• 9.5 Cracks

• 9.6 Pipes

• 9.7 Laminations

• 9.8 Laps

• 9.9 Forging butsts

• 9.10 Void

• 10.1 Indications of nonmetallic inclusions

• 10.2 Indications of surface seams

• 10.3 Indications of Crack

• 10.4 Indications of Lamination

• 10.5 Indications of laps

• 10.6 Indications of bursts and flakes

• 10.7 Indication of porosity

• 10.8 Nonrelevant indications

• 1.1 Theory

  • 1.1.1 Flux patterns

  • 1.1.2 Frequency and voltage factors

  • 1.1.3 Current calculations

  • 1.1.4 Surface flux strength

  • 1.1.5 Subsurface effects

• 1.2 Magnets and magnetism

  • 1.2.1 Distance factors versus strength of flux

  • 1.2.2 Internal and External flux patterns

  • 1.2.3 Phenomenon action at the discontinuity

  • 1.2.4 Heat effects on magnetism

  • 1.2.5 Material hardness versus magnetic retention

• 2.1 Direct current

  • 2.1.1 Depth of penetration factors

  • 2.1.2 Source of current

• 2.2 Direct pulsating current

  • 2.2.1 Similarity to direct current

  • 2.2.2 Advantages

  • 2.2.3 Typical fields

• 2.3 Alternative current

  • 2.3.1 Cycle effects

  • 2.3.2 Surface strength characteristics

  • 2.3.3 Saety precautions

  • 2.3.4 Voltage and current factors

  • 2.3.5 Source of current

• 3.1 Design factors

  • 3.1.1 Mechanical properties

  • 3.1.2 Part use

• 3.2 Relationship to load-carrying ability

• 4.1 Circular techniques

  • 4.1.1 Current calculations

  • 4.1.2 Depth-factor considerations

  • 4.1.3 Precountions – safety and overheating

  • 4.1.4 Contact prods and yokes

    • 4.1.4.1 Requirements for prods and yokes

    • 4.1.4.2 Current-carying capabilities

  • 4.1.5 Discontinuites commonly detected

• 4.2 Longitudinal technique

  • 4.2.1 Principle of induced flux fields

  • 4.2.2 Geometry of part to be inspected

  • 4.2.3 Shapes and sizes coils

  • 4.2.4 Use of coils and cables

    • 4.2.4.1 Strength of field

    • 4.2.4.2 Current deiriection flow versus flux field

    • 4.2.4.3 Shapes, sizes, and current capacities

  • 4.2.5 Current calculations

  • 4.2.6 Discontinuites commonly detected

• 5.1 Alloy, shape, condition of part

• 5.2 Type of magnetizing current

• 5.3 Direction of magnetic field

• 5.4 Sequence of operations

• 5.5 Value of flux density

• 6.1 Need for demagnetization of parts

• 6.2 Current, frequency, and field orientation

• 6.3 Heat factors and precautions

• 6.4 Need for collapsing flux fields

7.0 Equipment

• 7.1 Portable type

  • 7.1.1 Reason for portable equipment

  • 7.1.2 Capabilities of portable equipment

  • 7.1.3 Similarity to stationary equipment

7.0 Equipment

• 7.2 Stationary type

  • 7.2.1 Capability of handing large and heavy parts

  • 7.2.2 Flexibility in use

  • 7.2.3 Need for stationary equipment

  • 7.2.4 Use of accessories and attachments

7.0 Equipment

• 7.3 Automatic type

  • 7.3.1 Requirements for automation

  • 7.3.2 Sequential operations

  • 7.3.3 Control and operation factors

  • 7.3.4 Alarm and rejection mechanisms

7.0 Equipment

• 7.4 Multidirectional units

  • 7.4.1 Capability

  • 7.4.2 Control and operation factors

  • 7.4.3 Applications

7.0 Equipment

• 7.5 Liquids and powders

  • 7.5.1 Liquid requirements as a particle vehicle

  • 7.5.2 Safety precautions

• 8.1 In casting

• 8.2 In ingots

• 8.3 In wrought sections and pats

• 8.4 In welds

9.0 Evaluations Techniques

• 9.1 Use of standards- e.g. ASTM E1444, E3024, E709

  • 9.1.1 Need for standards and references

  • 9.1.2 Comparison of known with unknown

  • 9.1.3 Specifications and certifications

  • 9.1.4 Comparison techniques

9.0 Evaluations Techniques

• 9.2 Defect appraisal

  • 9.2.1 History of part

  • 9.2.2 Manufacturing process

  • 9.2.3 Possible causes of defect

  • 9.2.4 Use of part

  • 9.2.5 Acceptance and rejection criteria

  • 9.2.6 Use of tolerances

• 10.1 Malfunctioning of equipment

• 10.2 Proper magnetic particles and bath liquid

• 10.3 Bath concentration

  • 10.3.1 Settling test

  • 10.3.2 Other bath-strength tests

• 10.4 Tests for ultraviolet radiation intensity