MODULE 1: Introduction to Ultrasonic Testing
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Tips before getting started
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What to expect in this section? (0:44)
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How does sound help us inspect objects? (2:08)
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How does Sound travel? (1:55)
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Why you sound different on a voice recorder?
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Ultrasonic Applications: SONAR
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Ultrasonic Applications: Fishing
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Ultrasonic Applications: Levitating Objects
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Responsibilities of Level I, II and III and Qualification vs Certification (4:19)
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SNT-TC-1A Recommendations
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SNT-TC-1A Document (5:52)
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Frequency, Wavelength & Velocity using Brushing example (7:40)
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What is frequency and wavelength? (4:11)
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Velocity, frequency and wavelength equation (3:18)
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High Freq vs Low Freq
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Read Chapter 1
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Summary Lesson 1
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Review 1
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Review 1 Explained (24:34)
MODULE 2: Basic Principles of Sound
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What to expect in this section? (1:00)
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Modes of Sound Propagation (7:47)
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Modes of Sound Propagation in detail (7:58)
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Lamb Waves Visual
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Interactive: Modes of Propagation
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Civa: straight beam and angle beam animation (12:03)
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What is frequency and wavelength? (4:11)
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Velocity, frequency and wavelength equation (3:18)
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Test Your Human Hearing Range
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Blind Guy Echolocation
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What is the relationship between frequency and penetration? (1:50)
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Attenuation (loss of sound) (1:06)
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Acoustical Impedance and Impedance Ratio (3:09)
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Civa: Normal Incidence (11:07)
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Reflection vs Refraction of sound. (5:29)
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Interactive: Incident, Reflected and Refracted
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Civa : Refraction (6:35)
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Mode Conversion and Critical Angles (6:56)
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Mode Conversion Interactive Guided Exercise
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Civa: Mode conversion (18:47)
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QnA Session on Snell's Law with Animation (29:22)
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Calculating Critical Angles using Snell's Law (13:53)
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QnA Session on Critical Angles (19:15)
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Interactive: Critical Angles (Wedge drag and drop)
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Read Chapter 2
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Lesson 2 Summary
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Review 2
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Review 2 Explained (20:43)
Module 3: Equipment
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Typical UT Flaw detectors (2:18)
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What is Decible?
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Loudness Comparison in Decibels
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Decibels in details (23:19)
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Interactive: Gain (dB) vs Amplitude (%)
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Math problems on Decibels and its practical relevance. (7:07)
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DB Sample Problem Explained (11:20)
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What is A-scan, B-scan and C-scan? (2:43)
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Civa: A scan (25:37)
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Civa: B Scan (16:55)
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Civa: C Scan (22:47)
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4 types of rectifications (3:45)
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What is Calibration and what are Reference Standards? (1:40)
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What are Area Amplitude Blocks? (3:32)
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CIVA: Area Amplitiude Blocks (6:54)
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What are Distance Amplitude Blocks? (2:24)
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CIVA: Distance Amplitude Blocks (7:33)
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Distance Amplitude Correction (DAC) Curve
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More on DAC (36:14)
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Most important acronym in Ultrasonic Testing (3:02)
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FPADS Knuckle Video (2:55)
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Interactive: FPADSCRYN
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Audio Review of Modules 1 to 3
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Read Chapter 3
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Lesson 3 summary
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Review 3
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Review 3 Explained (37:04)
Module 4: About the Transducer
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What to expect in this section? (0:58)
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Piezo-electricity (4:55)
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Piezo-electric Materials (1:44)
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Civa Near far zone (7:09)
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Civa: Frequency and Beam Shape (7:10)
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Near zone, Far zone and Dead zone (4:39)
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Three Zones in detail (QnA Session) (23:18)
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Dead Zone Explained
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Beam Spread and its dependence on diameter of the transducer. (2:16)
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Civa Beam Spread and Diameter relation (7:53)
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Types of transducers (3:22)
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Dual Crystals and the Round Mound of Sound
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How to quickly check wedge contour for Shear Wave transducers
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Resolution and Sensitivity
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Civa Resolution Sensitivity (16:11)
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Sensitivity Resolution QnA
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Broadband vs Narrowband Transducers
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Damping (2:55)
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Gain and Voltage
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How to use powder couplant?
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Couplants (2:14)
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Honey vs Couplant
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UT Thickness without Couplant!
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Noncontact Transducers (5:59)
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Grating Lobes and Side Lobes
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Read Chapter 4
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Lesson 4 summary
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Review 4
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Review 4 Explained (24:14)
Module 5: The different UT techniques
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What to expect in this section? (1:40)
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Pulse-Echo, Pitch-Catch and Through Transmission (5:01)
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What is Ultrasonic Immersion Testing (6:39)
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Can you answer this Immersion UT question? (2:22)
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Wheel Type Immersion UT
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Bubbler/Squirter Immersion UT
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Read Chapter 5
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Lesson 5 Summary
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Review 5
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UT Practice Test #1
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UT Practice Test #1 Explained (44:53)
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THE END of Level I
Module 6: Reading Assignment Lesson 6
Module 7: Calibrating UT Equipment
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High Pass and Low Pass filters (3:07)
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Horizontal linearity, Vertical linearity and Amplitude linearity
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Basic equipment familiarity
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Range Interactive
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Straight Beam Calibration
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Angle-beam Calibration
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Interactive: Angle Beam Sound Path
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Interactive: Angle Beam Reflector Orientation
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Interactive: Choosing the right Wedge for the Weld-Bevel Angle
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Interactive: Angle Beam 3rd Leg Inspection
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What does a Centerline crack look like in UT?
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6 db Drop Defect Sizing Technique (Incomplete Penetration)
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6 db drop interactive exercise
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Test your sizing skills: 6 dB Drop Sizing Test
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ERVD Block
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Distance Amplitude Correction (DAC) Curve
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Read Chapter 7
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Lesson 7 Summary
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Review
Practical Demonstrations
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Thickness Calibration with Dakota Ultrasonics DFX-7 (1:48)
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How to perform UT thickness calibration using Omniscan SX? (7:09)
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Interactive Simulation: Scanning Plates
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Simple tips for using Ultrasonic Pen-Probe
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Echo to Echo technique
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High Temperature UT Thickness
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Interactive scan plan for angle beam testing of welds
Module 8: Evaluation of Base Materials
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What is an Ingot?
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What is Continuous Casting?
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UT of Tubes and Bars (4 videos)
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Detection of Laminations (Practical Demo)
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What is Forging? (2 videos)
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Casting Defects
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UT of Iron Castings (Practical Demo)
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What is a Composite?
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What does damage to a composite look like?
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Immersion UT of a Composite
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Stick Welding (or Shielded Metal Arc Welding: SMAW)
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MIG Welding (GMAW)
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TIG Welding (GTAW)
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Flux Cored Arc Welding (FCAW)
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WELDING DEFECTS!! Porosity, Arc Strikes, Undercut
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WELDING DEFECTS!! Incomplete Penetration, Spatter, Excessive Reinforcement
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Stick Welding Defects: Incomplete Fusion, Slag Inclusion, Overlap
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Read Chapter 8
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Lesson 8 Summary
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Review Chapter 8
Module 9: About discontinuities
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What to expect in this section? (0:55)
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Recapping Ultrasonic Immersion Testing (6:39)
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Can you answer this Immersion UT question? (2:22)
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Relevant and Nonrelevant Indications (4:01)
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3 stages of discontinuity detection (2:04)
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Discontinuity Orientation and its Effects
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Discontinuity vs Defects
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Defect sizing technique-6dB Drop
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Some tips on Detecting Discontinuities
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Crack Detection: Surface Waves or Shear Waves?
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Thickness Measurement of Thin Materials
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Read Chapter 9
Bonus Videos
