Ultrasonics Level 1
Course Overview
Training Objectives
This course provides a basic knowledge of ultrasonic testing fundamentals sufficient to enable the technician to carry out ultrasonic testing to established procedures under the supervision of Level 2 or Level 3 personnel.
Applicable Standards
This course meets the training syllabus requirements of CAN/CGSB-48.9712, ISO 9712 and SNT-TC-1A.
Responsibilities of Level 1 Personnel (as per CGSB)
Level 1 personnel are defined as personnel who properly perform specific calibrations and specific evaluations for acceptance or rejection determinations, according to written instructions, and record results. Level 1 carry out industrial ultrasonics under the supervision of Level 2 or Level 3 personnel and shall receive the necessary instructions from a Level 2 or Level 3 individual.
Course Outline
- Introduction
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- Historical perspective of the use of ultrasound
- Comparison with other commonly used NDT methods
- Fundamental Properties of Ultrasound
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- Definition of ultrasonic vibrations
- Relationship of frequency velocity and wavelength
- Diffraction theory
- Modes of particle vibration
- Ultrasound uses
- Generation of Ultrasonic Waves
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- Piezoelectric crystal types and characteristics
- Search unit construction
- Search unit characteristics: resolution; sensitivity
- Search unit types: single element; dual element; Angle beam
- Test Material Characteristics
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- Velocity
- Sound attenuation
- Acoustic impedance
- Sound Beam Characteristics
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- Dead zone; Near zone; Far zone
- Intensity variations
- Probe diameter and frequency effect
- Angular Incidence
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- Reflection
- Transmission
- Refraction
- Mode conversion
- Critical angles
- Snell's Law
- Ultrasonic Inspection Techniques
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- Through transmission
- Pulse echo
- Angle beam
- Contact testing
- Immersion testing
- Ultrasonic Testing Equipment
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- Basic pulse echo instrument
- Control functions and uses
- Information displays: A scan, B scan, C scan, digital readouts
- Computer enhanced displays
- Ultrasonic Reference Blocks
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- Area amplitude blocks
- Distance amplitude blocks
- International Institute of Welding (IIW) block
- Miniature angle beam calibration block
- Uses of artificial reflectors compared
- Inspected Part Variations
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- Effect of surface roughness
- Effect of surface coatings
- Surface curvature
- Parallelism
- Grain size
- Discontinuity Variations
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- Size
- Shape
- Orientation
- Distance from entry surface
Note: Participants are requested to have a calculator capable of scientific notation. Safety shoes are mandatory for all laboratory work.
This course is offered in partnership with Canadian Institute for Non-Destructive Evaluation (CINDE).
