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Ultrasonic Testing
MODULE 1: Introduction to Ultrasonic Testing
Tips before getting started
What to expect in this section? (0:44)
How does sound help us inspect objects? (2:08)
How does Sound travel? (1:55)
Why you sound different on a voice recorder?
Ultrasonic Applications: Railroad
Ultrasonic Applications: SONAR
Ultrasonic Applications: Fishing
Ultrasonic Applications: Levitating Objects
Responsibilities of Level I, II and III and Qualification vs Certification (4:19)
SNT-TC-1A Recommendations
SNT-TC-1A Document (5:52)
Read Chapter 1
Summary Lesson 1
Review
MODULE 2: Basic Principles of Sound
What to expect in this section? (1:00)
Modes of Sound Propagation (7:47)
Modes of Sound Propagation in detail (7:58)
What is frequency and wavelength? (4:11)
Velocity, frequency and wavelength equation (3:18)
Test Your Human Hearing Range
Blind Guy Echolocation
What is the relationship between frequency and penetration? (1:50)
Attenuation (loss of sound) (1:06)
Acoustical Impedance and Impedance Ratio (3:08)
Reflection vs Refraction of sound. (5:28)
Mode Conversion and Critical Angles (6:56)
Snell's Law Math Problem (8:50)
QnA Session on Snell's Law with Animation (29:22)
Calculating Critical Angles using Snell's Law (13:53)
QnA Session on Critical Angles (19:15)
Read Chapter 2
Lesson 2 Summary
Review
Module 3: Equipment
What is A-scan, B-scan and C-scan? (2:43)
Typical UT Flaw detectors (2:18)
What is Decible?
Loudness Comparison in Decibels
Math problems on Decibels and its practical relevance. (7:07)
Decibels in details (23:19)
4 types of rectifications (3:45)
What is Calibration and what are Reference Standards? (1:40)
What are Area Amplitude Blocks? (3:32)
What are Distance Amplitude Blocks? (2:24)
Audio Review of Modules 1 to 3
Read Chapter 3
Lesson 3 summary
Review
Most important acronym in Ultrasonic Testing (3:02)
Practical Demonstrations
Thickness Calibration with Dakota Ultrasonics DFX-7 (1:48)
How to perform UT thickness calibration using Omniscan SX? (7:09)
Simple tips for using Ultrasonic Pen-Probe
Echo to Echo technique
High Temperature UT Thickness
Module 4: About the Transducer
What to expect in this section? (0:58)
Piezo-electricity (4:55)
Piezo-electric Materials (1:44)
Near zone, Far zone and Dead zone (4:39)
Three Zones in detail (QnA Session) (23:18)
Dead Zone Explained
Beam Spread and its dependence on diameter of the transducer. (2:16)
Types of transducers (3:22)
Dual Crystals and the Round Mound of Sound
How to quickly check wedge contour for Shear Wave transducers
Resolution and Sensitivity
Broadband vs Narrowband Transducers
Gain and Voltage
How to use powder couplant?
Couplants (2:14)
Honey vs Couplant
UT Thickness without Couplant!
Noncontact Transducers (5:59)
Read Chapter 4
Lesson 4 summary
Review
Module 5: The different UT techniques
What to expect in this section? (1:40)
Pulse-Echo, Pitch-Catch and Through Transmission (5:01)
What is Ultrasonic Immersion Testing (6:39)
Can you answer this Immersion UT question? (2:22)
Wheel Type Immersion UT
Bubbler/Squirter Immersion UT
Read Chapter 5
Lesson 5 Summary
Review Lesson 5
Module 6: Reading Assignment Lesson 1-6
Lesson 6 Summary
Review Lesson 6
Module 7: Calibrating UT Equipment
Horizontal linearity, Vertical linearity and Amplitude linearity
Basic equipment familiarity
Straight Beam Calibration
Angle-beam Calibration
What does a Centerline crack look like in UT?
6 db Drop Defect Sizing Technique (Incomplete Penetration)
ERVD Block
Distance Amplitude Correction (DAC) Curve
Read Chapter 7
Lesson 7 Summary
Review
Module 8: Evaluation of Base Materials
What is an Ingot?
What is Continuous Casting?
UT of Tubes and Bars (4 videos)
Detection of Laminations (Practical Demo)
What is Forging? (2 videos)
Casting Defects
UT of Iron Castings (Practical Demo)
What is a Composite?
What does damage to a composite look like?
Immersion UT of a Composite
Stick Welding (or Shielded Metal Arc Welding: SMAW)
MIG Welding (GMAW)
TIG Welding (GTAW)
Flux Cored Arc Welding (FCAW)
WELDING DEFECTS!! Porosity, Arc Strikes, Undercut
WELDING DEFECTS!! Incomplete Penetration, Spatter, Excessive Reinforcement
Stick Welding Defects: Incomplete Fusion, Slag Inclusion, Overlap
Read Chapter 8
Lesson 8 Summary
Review Chapter 8
Practice Tests
UT Practice Test #1
UT Practice Test #1 Explained (44:53)
UT Practice Test #2
UT Practice Test #2 Explained (54:33)
UT Practice Test #3
UT Practice Test #3 Explained (66:33)
Bonus Videos
Tips to be a great NDT Technician Part 1 (2:54)
Tips to be a great NDT Technician Part 2 (3:34)
Final Review (45:46)
Teach online with
Simple tips for using Ultrasonic Pen-Probe
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