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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)
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)
Test Your Human Hearing Range
Velocity, frequency and wavelength equation (3:18)
Blind Guy Echolocation
What is the relationship between frequency and penetration? (1:50)
Review
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)
Calculating Critical Angles using Snell's Law (13:53)
QnA Session on Critical Angles (19:15)
QnA Session on Snell's Law with Animation (29:22)
Module 3: Equipment
What is A-scan, B-scan and C-scan? (2:43)
Typical UT Flaw detectors (2:18)
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)
Review
Audio Review of Modules 1 to 3
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
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)
Beam Spread and its dependence on diameter of the transducer. (2:16)
Types of transducers (3:22)
Resolution and Sensitivity
Broadband vs Narrowband Transducers
Gain and Voltage
How to use powder couplant?
Couplants (2:14)
Honey vs Couplant
Noncontact Transducers (5:59)
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
Review
Review Lesson 5
Module 6: Reading Assignment Lesson 1-6
Read Lesson 1-6
Keys to the quizes
Module 7: Additional useful videos
Most important acronym in Ultrasonic Testing (3:02)
High Pass and Low Pass filters (3:07)
Review Lesson 6
Module 8: Calibrating UT Equipment
Basic equipment familiarity
Straight Beam Calibration
Angle-beam Calibration
ERVD Block
Module 9: About discontinuities
3 stages of discontinuity detection (2:04)
Relevant and Nonrelevant Indications (4:01)
Module 10: 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)
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)
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How to perform UT thickness calibration using Omniscan SX?
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